期刊文献+
共找到264篇文章
< 1 2 14 >
每页显示 20 50 100
Italian Ryegrass (Lolium perenne ssp. multiflorum) and Corn (Zea mays) Competition 被引量:1
1
作者 Vijay K. Nandula 《American Journal of Plant Sciences》 2014年第26期3914-3924,共11页
Italian ryegrass is an annual/biennial grass that is typically used as a pasture crop or a cover crop along roadsides, rights-of-way, and industrial areas. Glyphosate-resistant (GR) Italian ryegrass populations have b... Italian ryegrass is an annual/biennial grass that is typically used as a pasture crop or a cover crop along roadsides, rights-of-way, and industrial areas. Glyphosate-resistant (GR) Italian ryegrass populations have been documented around the world, mostly in orchard and vineyard situations. The first evidence of evolved GR Italian ryegrass in row/agronomic crops was reported from Washington County, Mississippi in 2005. GR Italian ryegrass populations can jeopardize preplant burndown options in reduced-tillage crop production systems, thereby, delaying planting operations. The effects of competition of Italian ryegrass on crop growth and yield are poorly understood. A field study was conducted in the 2012 growing season and repeated in the 2013 growing season. GR and susceptible (GS) Italian ryegrass populations were established in the greenhouse and transplanted in prepared corn row beds in the fall of 2011 and 2012 at 0, 1, 2, 3, and 4 plants·meter> of crop row. Italian ryegrass plants overwintered and developed over the following spring-summer. Glyphosate was applied at 1.26 kg·ae/ha (1.5× of labeled rate) in the spring to burndown the Italian ryegrass plants and corn was planted into the ryegrass residue 2 - 3 wk later. Current corn production practices were followed. Corn density (early and late season), height (early season), and yield and Italian ryegrass biomass (early-mid season) measurements were recorded during both years. Corn height was greater in 2012 than that in 2013 at comparable stages of the growing season, due to a cooler and wetter early season in 2013 than that in 2012. Averaged across weed densities, corn density (both early and late season) and yield were higher in the GS than those in the GR population, but Italian ryegrass biomass was similar for both populations. Averaged across Italian ryegrass populations, corn density (both early and late season), and yield were inversely proportional to Italian ryegrass density. In summary, Italian ryegrass significantly reduced corn density and yield and reduction was greater with the GR than that with the GS population. Studies are underway to study inter population competition in Italian ryegrass and investigate allelopathic effects of Italian ryegrass on selected crops. 展开更多
关键词 COMPETITION CORN Interference Italian ryegrass lolium perenne ssp. multiflorum (Lam.) Husnot Zea mays L.
下载PDF
Seed Size Effects on Early Seedling Growth and Response to Applied Nitrogen in Annual Ryegrass (<i>Lolium multiflorum</i>L.) 被引量:1
2
作者 Paul W. Bartholomew 《Agricultural Sciences》 2015年第10期1232-1238,共7页
Use of individual plants as experimental units may be necessary when resources are limited, but inter-plant variation risks obscuring differences among treatments. Experiments were undertaken to measure the effects of... Use of individual plants as experimental units may be necessary when resources are limited, but inter-plant variation risks obscuring differences among treatments. Experiments were undertaken to measure the effects of seed size on seedling size and response to applied nitrogen of annual ryegrass (Lolium multiflorum L.) harvested six or nine weeks after emergence. In two series of experiments, shoot and root dry weights of seedlings increased respectively at means of 53 - 61 and 29 - 30 mg·mg-1 increase in mean seed weight. Between the largest and smallest seed sizes used in this study, there was 83% difference in shoot weight at harvest six weeks after emergence and 22% difference with harvest nine weeks after emergence. Nitrogen (N) application, in comparison, increased shoot dry weights by averages of 69% and 77% with harvests at six or nine weeks, respectively. Dry mass response to N application was similar across seed size categories in shoots or roots. A mean 30% of total seedling-N was retained in roots. Nitrogen utilization efficiency for shoot growth (increase in shoot growth per unit increase in shoot N capture) ranged from 64 mg·mg-1 with harvest six weeks after emergence to 114 mg·mg-1 with harvest at nine weeks after emergence. Delay in seedling harvest from six to nine weeks post-emergence and use of closely-graded seed can reduce variation in individual seedling size and contribute to reduction in random variation in small-scale experiments. 展开更多
关键词 SEED Size SEEDLING Growth lolium multiflorum
下载PDF
多花黑麦草(Lolium multiflorum Lam)籽粒收获适期的研究 被引量:2
3
作者 何亚丽 胡雪华 +1 位作者 邵游 袁韶红 《上海农学院学报》 1993年第3期214-221,共8页
1990~1992年对多花黑麦草(LoLium multiflorum Lam)俄勒岗品种的3个不同生长条件的群体进行了开花后当天至花后30天内的籽粒灌浆,脱落现象的研究,结果表明:3个群体的千粒重和脱落率与花后天数的关系均符合 Logistic 理论曲线.单穗籽粒... 1990~1992年对多花黑麦草(LoLium multiflorum Lam)俄勒岗品种的3个不同生长条件的群体进行了开花后当天至花后30天内的籽粒灌浆,脱落现象的研究,结果表明:3个群体的千粒重和脱落率与花后天数的关系均符合 Logistic 理论曲线.单穗籽粒干物重最大值出现在花后18~24天.花后15~18天的种子已具有较高发芽率(64.3%~91.1%),与以后各期收获的种子间无显著差异,但以花后18~24天的种子发芽苗质较好.据此.上海地区多花黑麦草种子的最佳收获期为花后18天~24天. 展开更多
关键词 多花黑麦草 收获期
下载PDF
Effects of Nitrogen Fertilization on Some Turfgrass Characteristics of Perennial Ryegrass (Lolium perenne L.)
4
作者 Hakki Akdeniz Ibrahim Hosaflioglu 《Journal of Agricultural Science and Technology(B)》 2016年第4期226-237,共12页
The paper aimed to study the effects of nitrogen fertilization on the yield and some plant characteristics of perennial ryegrass (Lolium perenne L.). The study was conducted at Agricultural Research and Application Ce... The paper aimed to study the effects of nitrogen fertilization on the yield and some plant characteristics of perennial ryegrass (Lolium perenne L.). The study was conducted at Agricultural Research and Application Center of the Faculty of Agriculture in Igdir University in 2013. In the experiment, eight levels of fertilizers: 0, 10.0, 20.0, 30.0, 40.0, 50.0, 60.0 and 70.0 kg N/ha per month were applied in perennial ryegrass (Lolium perenne L.) during the sixth growing season. A randomized complete block with three replications was used as the experimental design. Nitrogen application affected plant height, green grass yield, plant covering rate, canopy color and turfgrass quality values of perennial ryegrass positively. In both monthly and as the average of nitrogen application, times of application (spring, summer and fall) caused the most uniform turfgrass quality and establishment. Results indicated that although a significant impact was on the character investigated, such as the leaf length, green grass yield, plant cover ratio, canopy color and turfgrass quality, the doses of nitrogen fertilizer have created close to each other in groups. In the stand point of view of all characters, N1, N2 and N3 were located in first group, N4 and N5 in the second group, N6 and N7 in the third group, expect for control (N0). It can be concluded that 40.0-50.0 kg N/ha per month may be more suitable to be used in ryegrass production in the landscape. 展开更多
关键词 ryegrass lolium perenne L. NITROGEN FERTILIZATION TURFGRASS quality
下载PDF
基于生态位模型的多花黑麦草入侵风险分析 被引量:1
5
作者 陈瑜 杨毅哲 +7 位作者 陈丽丽 宋兴江 李欣迪 张献瑞 史岩 王佳 宋雅琪 刘刚 《陕西师范大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第1期70-78,共9页
外来植物多花黑麦草的入侵对陕西、河南、江苏、四川等地的农业生产造成了严重危害。为构建多花黑麦草入侵风险预警,利用主成分分析模型和最大熵模型对多花黑麦草在入侵中国后的生态位分化及在中国的入侵阶段进行分析。结果表明,多花黑... 外来植物多花黑麦草的入侵对陕西、河南、江苏、四川等地的农业生产造成了严重危害。为构建多花黑麦草入侵风险预警,利用主成分分析模型和最大熵模型对多花黑麦草在入侵中国后的生态位分化及在中国的入侵阶段进行分析。结果表明,多花黑麦草在入侵我国后发生了显著的生态位漂移;相比于其原产地种群,多花黑麦草在中国的入侵种群生态位宽度更广,适应的气候区显著扩展;在当前气候条件下,中国南方大部分区域属于多花黑麦草的稳定入侵区,而北方和西部地区存在其局域适应区和潜在拓殖区。研究结果反映出多花黑麦草在我国东中部大部分地区具有较高的入侵潜力,也暗示了多花黑麦草较高的生态位进化能力可能是其在我国广泛入侵的重要原因。研究结果为开展多花黑麦草的防控和治理提供了重要研究基础。 展开更多
关键词 多花黑麦草 MaxEnt模型 生态位漂移 入侵阶段
下载PDF
黑麦草(Lolium perenne)根际细菌多样性对Ni污染沉积物修复效果的响应 被引量:3
6
作者 吴卿 赵彩云 +2 位作者 李东梅 王美 李思聪 《农业环境科学学报》 CAS CSCD 北大核心 2012年第6期1135-1140,共6页
应用黑麦草(Lolium perenne)对某滨海城市南排污河的重金属污染沉积物——底泥进行植物修复,并结合变性梯度凝胶电泳(DGGE)分析了黑麦草根际土壤的重金属Ni含量和细菌多样性的关系。结果表明,黑麦草对Ni的修复效果较好,种植黑麦草后根... 应用黑麦草(Lolium perenne)对某滨海城市南排污河的重金属污染沉积物——底泥进行植物修复,并结合变性梯度凝胶电泳(DGGE)分析了黑麦草根际土壤的重金属Ni含量和细菌多样性的关系。结果表明,黑麦草对Ni的修复效果较好,种植黑麦草后根际土壤Ni浓度降低了11.8%。根际土壤中Ni有效态含量与根际土壤pH值的变化呈较好的正相关关系,相关系数为0.9688。对根际土壤细菌多样性进行分析,重金属Ni含量变化能够影响土壤细菌的多样性,根际土壤细菌多样性随黑麦草的生长而不断演变,且与根际土壤中Ni浓度变化有密切联系。对DGGE电泳后回收的部分片段进行测序并建立了进化树,结果表明,测序片段与非培养方法得到的菌种的同源性较高,且其均在土壤或河道底泥的相关研究中被发现。不同时期细菌群体组成和Shan non指数随着修复时间而变化,并与细菌总数有正相关关系。 展开更多
关键词 黑麦草 污染底泥 重金属 细菌多样性
下载PDF
17份多花黑麦草品种(系)农艺性状与产量形成关系的多重分析
7
作者 余帅 冯光燕 +3 位作者 苏晓丽 张献芳 左粟田 张新全 《草地学报》 CAS CSCD 北大核心 2024年第9期2862-2874,共13页
为探究多花黑麦草(Lolium multiflorum)农艺性状与产量形成的关系,评估各性状的遗传参数,明确产量形成的主要性状因子,筛选性状综合评价指标。本试验运用变异分析、遗传参数分析、相关分析、主成分分析、线性回归分析、通径分析及聚类... 为探究多花黑麦草(Lolium multiflorum)农艺性状与产量形成的关系,评估各性状的遗传参数,明确产量形成的主要性状因子,筛选性状综合评价指标。本试验运用变异分析、遗传参数分析、相关分析、主成分分析、线性回归分析、通径分析及聚类分析对17份多花黑麦草品种(系)农艺性状与产量进行综合评价。结果表明:多花黑麦草各性状变异系数介于3.70%(开花期)~24.85%(单株种子产量)之间;多样性指数范围在1.611(倒二叶宽)~2.007(千粒重)之间;旗叶宽、茎粗、千粒重及单株种子产量广义遗传力和相对遗传进度较高,其在育种选择中的应用效果较好。回归分析及通径分析表明:旗叶宽对单株干草产量及单株种子产量的直接影响最大。聚类分析将17份多花黑麦草品种(系)分为3类,其中第Ⅰ类包含的3份材料综合性状表现优秀,可作为后续育种利用及亲本选配的备用材料。 展开更多
关键词 多花黑麦草 农艺性状 单株种子产量 单株草产量 综合评价
下载PDF
安融乐与除草剂混用对小麦田多花黑麦草的防除效果研究
8
作者 左娇 胡荣娟 +5 位作者 夏爱萍 高飞 董艳明 魏佳峰 李春林 张瑞萍 《安徽农业科学》 CAS 2024年第19期133-135,共3页
为评价安融乐与除草剂混用对小麦田恶性杂草多花黑麦草的防除效果,开展了田间试验。结果表明,安融乐可以提高除草剂的速效性。药后15 d, 5%唑啉草酯乳油用量减少300 mL/hm^(2)后,加入安融乐使多花黑麦草达到5级药害症状的比例增加55.56%... 为评价安融乐与除草剂混用对小麦田恶性杂草多花黑麦草的防除效果,开展了田间试验。结果表明,安融乐可以提高除草剂的速效性。药后15 d, 5%唑啉草酯乳油用量减少300 mL/hm^(2)后,加入安融乐使多花黑麦草达到5级药害症状的比例增加55.56%~61.69%;安融乐与5%唑啉草酯乳油+50%异丙隆可湿性粉剂+18%氟唑磺隆·炔草酯可分散油悬浮剂混用达到5级药害症状的杂草比例比除草剂单用增加125.35%~141.95%;安融乐与5%唑啉草酯乳油+30 g/L甲基二磺隆可分散油悬浮剂+18%氟唑磺隆·炔草酯可分散油悬浮剂混用达到5级药害症状的杂草比例比除草剂单用增加21.42%~35.82%。药后45 d,杂草株防效和鲜重防效均达到最高。安融乐能有效提高除草剂对多花黑麦草的作用速度及防除效果,可以进一步示范和推广。 展开更多
关键词 安融乐(3%卵磷脂·维生素E) 除草剂 多花黑麦草 防除效果
下载PDF
黑麦草种子及幼苗对镉胁迫的生理响应
9
作者 王建伟 贺晓岚 +3 位作者 王根平 欧倩 肖云娟 杨雪丽 《湖北农业科学》 2024年第5期126-135,142,共11页
为了探明不同黑麦草品种对镉(Cd)富集能力的差异及其生理机制,以6个黑麦草品种为材料,研究镉胁迫对其种子萌发、生物量、镉吸收、色素含量、光合特性及抗逆特性的影响。结果表明,与正常生长条件相比,镉胁迫对不同黑麦草品种种子萌发和... 为了探明不同黑麦草品种对镉(Cd)富集能力的差异及其生理机制,以6个黑麦草品种为材料,研究镉胁迫对其种子萌发、生物量、镉吸收、色素含量、光合特性及抗逆特性的影响。结果表明,与正常生长条件相比,镉胁迫对不同黑麦草品种种子萌发和根芽生长具有低促高抑作用。镉胁迫增加了黑麦草光合色素含量;镉胁迫增加了维纳斯、奔驰、维多利亚叶片的气孔导度、胞间CO_(2)浓度、蒸腾速率;镉胁迫增加了奔驰、维多利亚、蓝标叶片的POD活性;镉胁迫增加了卡特、维多利亚叶片的SOD活性;镉胁迫增加了维多利亚、维纳斯叶片的CAT活性。奔驰、维多利亚、维纳斯可能较其他品种具有更强的耐镉性,从而减少镉对自身的危害;镉胁迫增加了所有品种可溶性糖含量及除卡特外的5个黑麦草品种脯氨酸含量,奔驰、蓝标、维多利亚能产生较多的渗透调节物质来减轻镉胁迫对其造成的伤害;在正常生长条件下,黑麦草地上部镉含量和镉累积量都较低,品种间差异较小。镉胁迫明显增加了黑麦草地上部镉含量和镉累积量,奔驰地上部镉含量和镉累积量最高,显著高于其他品种。综上,奔驰、维多利亚抗镉性及富镉能力较强,是镉污染土壤修复的优选品种。 展开更多
关键词 镉胁迫 黑麦草(lolium perenne L.) 种子萌发 幼苗 生理响应
下载PDF
发酵鸡粪与无机肥配施对多花黑麦草产量和品质的影响
10
作者 宋善丹 田浪 +2 位作者 曹娟 张富林 肖腾标 《耕作与栽培》 2024年第5期55-58,共4页
以多花黑麦草为试验材料,探究有机肥(发酵鸡粪OF)与无机肥(尿素IF)配施对多花黑麦草产量及饲用价值的影响,本研究设置4个处理,即对照组ck(不施肥)、100%IF、50%IF+50%OF、100%OF。结果表明,3个施肥组多花黑麦草的产量和营养价值均显著高... 以多花黑麦草为试验材料,探究有机肥(发酵鸡粪OF)与无机肥(尿素IF)配施对多花黑麦草产量及饲用价值的影响,本研究设置4个处理,即对照组ck(不施肥)、100%IF、50%IF+50%OF、100%OF。结果表明,3个施肥组多花黑麦草的产量和营养价值均显著高于ck,50%IF+50%OF组具有最高的株高、产量、CP和NDF含量,并且鲜草产量高达26166.67 kg/hm^(2),比100%IF处理组和100%OF处理组分别提高了71%和55%。综合分析,在实训牧草场,尿素与发酵鸡粪配合施用能提高多花黑麦草的产量和营养价值。 展开更多
关键词 多花黑麦草 产量 营养价值
下载PDF
Study on the Degradation Trend of Ryegrass-White Clover Artificial Grassland 被引量:12
11
作者 张建波 李相林 +4 位作者 万里强 陈瑞祥 赵相勇 陈伟 陈国南 《Agricultural Science & Technology》 CAS 2009年第1期26-28,88,共4页
[Objective] The study aimed to explore the degradation law and trend of artificial grassland. [Method] Taking the ryegrass (Lolium perenne) - white clover ( Trifolium repens) artificial grassland in Maiping Townsh... [Objective] The study aimed to explore the degradation law and trend of artificial grassland. [Method] Taking the ryegrass (Lolium perenne) - white clover ( Trifolium repens) artificial grassland in Maiping Township, Guizhou Province as the research object, the grassland vegetation of 40 quadrate from different areas (area around the sheep shed, hilltop, hillside, flatland at the foot of the hill) were analyzed by comparing the dominance and richness index. [ Result] Degradation of different degrees appeared in various areas of this artificial grassland. To be specific, the degradation of grassland around the sheep shed was not serious for less consumption by the sheep; however, the areas on the hilltop and hillside degenerated to the grassland types of dallis grass ( Paspalum dilatatum Poir. ) -Indian lovegrass ( Eragrostis pilosa) and dallis grass - cogongrass [ Imperata cylindrica ( Linn. ) Beauv. ], respectively, and the area at the foot of the hill degenerated to the grassland type dominated by garland chrysanthetnum ( Chrysanthemum coronarium L. ) and knotgrass ( Paspalum distichum L. ). [ Conclusion ] This study provided a basis for grassland improvement as well as the efficient and sustainable utilization of grazing-type artificial grassland in South China. 展开更多
关键词 ryegrass lolium perenne) White clover( Trifolium repens) Artificial grassland DEGRADATION
下载PDF
Cu^2+胁迫对黑麦草(Lolium perenne L.)去除富营养化水体中氮、磷效果的影响 被引量:5
12
作者 江凤娟 孙庆业 +1 位作者 李淼 俞汉青 《环境科学》 EI CAS CSCD 北大核心 2008年第6期1626-1631,共6页
为探讨不同浓度Cu2+胁迫对黑麦草去除富营养化水体中N、P营养盐效果的影响,采用小试培养的方法,研究了Cu2+存在条件下黑麦草对水体中N、P去除的动力学过程及黑麦草植株对不同浓度Cu2+胁迫的生态响应.结果表明,0.1~2.0 mg/LCu2+胁迫均降... 为探讨不同浓度Cu2+胁迫对黑麦草去除富营养化水体中N、P营养盐效果的影响,采用小试培养的方法,研究了Cu2+存在条件下黑麦草对水体中N、P去除的动力学过程及黑麦草植株对不同浓度Cu2+胁迫的生态响应.结果表明,0.1~2.0 mg/LCu2+胁迫均降低了黑麦草对水中N、P营养盐的去除速率,其去除过程符合二阶动力学模型.黑麦草对水体中Cu2+亦有良好的去除作用,根部是积累重金属Cu的主要部位,其对Cu2+的吸收速率符合米氏动力学方程.较低浓度Cu2+(≤0.2 mg/L)胁迫对黑麦草去除N、P的效果影响不大,并且能促进黑麦草生物量的增加,而较高浓度Cu2+(≥0.5 mg/L)胁迫虽有促进根系数量增加的趋势,但明显抑制了黑麦草根伸长和叶片生长等作用,因而严重影响了黑麦草对水体中N、P的去除. 展开更多
关键词 重金属CU 黑麦草 富营养化
下载PDF
Revegetation of Copper Mine Tailings with Ryegrass and Willow 被引量:20
13
作者 HAOXiu-Zhen ZHOUDong-Mei SIYou-Bin 《Pedosphere》 SCIE CAS CSCD 2004年第3期283-288,共6页
To restore vegetation on metal mine tailings is very difficult because theyoften contain high concentrations of heavy metals, low nutrient content and low water retentioncapacity. This study involved 3 experiments tha... To restore vegetation on metal mine tailings is very difficult because theyoften contain high concentrations of heavy metals, low nutrient content and low water retentioncapacity. This study involved 3 experiments that evaluated the effects of 4 treatment amendments:montmorillonite, rice straw, organic manure and chemical fertilizer on the growth of ryegrass(Lolium perenne L.) and willow (Salix viminalis L.) with Cu and Zn mine tailings from two miningareas. The results showed that ryegrass was the most tolerant of 4 crops to Cu toxicity. Also whenorganic manure, which contained high concentrations of inorganic salts, was added to the minetailings, it significantly hindered ryegrass growth (P = 0.05). Meanwhile, with ryegrass organicmanure significantly increased (P = 0.05) the extractable Cu concentration in both mine tailings.When montmorillonite was used as a mine tailings amendment with willow, the height and tress numberat the 1st cut were significantly greater (P = 0.05) than a control without montmorillonite. Howeverthere was no significant difference for height, tress number, dry weight or root dry weight at the2nd cut. So, amendment applications to reduce metal toxicity and increase nutrients retention inmine tailings were essential during revegetation of mine tailings. 展开更多
关键词 amendment copper mine tailings ryegrass (lolium perenne L.) willow (salixviminalis L.) zinc mine tailings
下载PDF
Phosphorus fractions of fertiliser-derived P in an allophanic soil under Pinus radiata seedlings grown with broom and ryegrass 被引量:1
14
作者 Achmad Arivin Rivaie Russ Williams Tillman 《Journal of Forestry Research》 SCIE CAS CSCD 2009年第3期229-236,共8页
Changes in phosphorus (P) fractions in a P deficient allophanic soil under P. radiata seedlings grown with broom (Cytisus scoparius L.) and ryegrass (Lolium multiflorum) in pots were studied 14 months after the ... Changes in phosphorus (P) fractions in a P deficient allophanic soil under P. radiata seedlings grown with broom (Cytisus scoparius L.) and ryegrass (Lolium multiflorum) in pots were studied 14 months after the application of triple superphosphate at the rates of 0, 50, and 100 pg.g^-1, to determine the fate of fertiliser-derived P in the rhizosphere soils. Application of P fertiliser increased NaOH-Pi, NaOH-Po, and H2SO4-Pi concentrations in the soil, but decreased the residual-P concentration. The resin-Pi concentration, which is ex- tremely low in this soil (1 to μgg^-1 ), remained the same. The majority of the added fertiliser P was however recovered in the NaOH-Pi fraction (40%-49%). This is due to the high P fixation in this soil (92%). The second highest P recovery was in NaOH-Po fraction (7%-19%). Under P deficient condition or addition at the rate of 0 μg.g^-6, the NaOH-Pi concentration in the radiata rhizosphere soil was lower than that in the bulk soil and broom and grass rhizosphere soils. This may be due to higher oxalate production by the roots and mycorrhiza under P deficient conditions which released some &the P fixed to the soils in the rhizosphere, which needs to be tested in future studies. 展开更多
关键词 Cytisus scoparius lolium multiflorum phosphorus fertiliser Pinus radiate RHIZOSPHERE soil phosphorus fractions
下载PDF
Genetic Diversity of Italian Ryegrass Diploid Cultivars, Revealed by Electrophoretically Detected Genotypes in Phosphoglucose Isomerase (PGI) 被引量:1
15
作者 M. Krzakowa 《Journal of Agricultural Science and Technology(B)》 2011年第5期778-782,共5页
Nine diploid cultivars of Italian ryegrass (Lolium multiflorum Lain.) from France (Fortyl, Vertyl and Jericho), Germany (Ligrande), United Kingdom (Aber Epic and Aber Mario), Denmark (Cordelia), Netherlands ... Nine diploid cultivars of Italian ryegrass (Lolium multiflorum Lain.) from France (Fortyl, Vertyl and Jericho), Germany (Ligrande), United Kingdom (Aber Epic and Aber Mario), Denmark (Cordelia), Netherlands (Alamo) and Poland (Tur) were tested with horizontal gel electrophoresis according to one locus (with four alleles) of the PGI enzyme system. One of them, named P4 is typical for the species, therefore can serve as a good marker for hybrids identification. Each cultivar was characterized by frequencies of different phenotypes. They were highly polymorphic (Pg = 0.58 - 0.78) and showed differences in heterozygosity level. The variability within populations (GST = 0.055) was higher than among populations (DST = 0.032). 展开更多
关键词 lolium multiflorum diploid cultivars genetic structure phosphoglucose isomerase (PGI) ELECTROPHORESIS
下载PDF
Phosphorus fractions of fertiliser-derived P in an allophanic soil under Pinus radiata seedlings grown with broom and ryegrass
16
作者 Achmad Arivin Rivaie Russ Williams Tillman 《Journal of Forestry Research》 SCIE CAS CSCD 2009年第A3期229-236,286,共9页
Changes in phosphorus (P) fractions in a P deficient allophanic soil under P. radiata seedlings grown with broom (Cytisus scoparius L.) and ryegrass (Lolium multiflorum) in pots were studied 14 months after the applic... Changes in phosphorus (P) fractions in a P deficient allophanic soil under P. radiata seedlings grown with broom (Cytisus scoparius L.) and ryegrass (Lolium multiflorum) in pots were studied 14 months after the application of triple superphosphate at the rates of 0, 50, and 100 μg·g-1, to determine the fate of fertiliser-derived P in the rhizosphere soils. Application of P fertiliser increased NaOH-Pi, NaOH-Po, and H2SO4-Pi concentrations in the soil, but decreased the residual-P concentration. The resin-Pi concentration, which is extremely low in this soil (1 to 3 μg·g-1 ), remained the same. The majority of the added fertiliser P was however recovered in the NaOH-Pi fraction (40%?49%). This is due to the high P fixation in this soil (92%). The second highest P recovery was in NaOH-Po fraction (7%?19%). Under P deficient condition or addition at the rate of 0 μg·g-1, the NaOH-Pi concentration in the radiata rhizosphere soil was lower than that in the bulk soil and broom and grass rhizosphere soils. This may be due to higher oxalate production by the roots and mycorrhiza under P deficient conditions which released some of the P fixed to the soils in the rhizosphere, which needs to be tested in future studies. 展开更多
关键词 Cytisus scoparius lolium multiflorum phosphorus fertiliser Pinus radiate RHIZOSPHERE soil phosphorus fractions
下载PDF
Madagascar High Lands Dry Season Forages: Lofium multiflorum (Italian Ray Grass) and Avena sativa (Oat)
17
作者 Isabelle Herisoa Hantanirina Olivier Jean Rakotonirina Rivo Nirina Rabearimisa Jean de Neupomuscene Rakotozandriny 《Journal of Environmental Science and Engineering(B)》 2014年第6期316-324,共9页
Italian ray grass and oat are two grass species characterized by their ability to adjust tropical climate conditions. This study proposed to assess forage productivities to allow an appropriate mowing period determina... Italian ray grass and oat are two grass species characterized by their ability to adjust tropical climate conditions. This study proposed to assess forage productivities to allow an appropriate mowing period determination in their use as dairy female feed in Madagascar. A test on small plots has been set up in the southern part of the capital city Antananarivo during one dry period (4 months). Live observations followed by laboratory proximate analyses have been performed for forage productivity and feeding value determination. Cultivated on tanety (hill), irrigated in counter season, results show that: (I) oat higher height (H = 96.7 cm) than Italian ray grass (H= 69.4 cm) at 99 days of age; (2) similar biomass productivity; (3) dry matter yields significantly different (p = 0.05); (4) certain similarity between dry matter yields and FMU (fodder milk unit) score evolution; (5) leafy stage of Italian ray grasses at 99 days of age; (6) mid-flowering stage for oats during the same period. Cell wall content, crude fiber and dry matter contents increased with age (p = 0.05). Crude proteins and minerals evolved in opposite directions. Gross energy content did not present precise variation with age. This study allowed that for an acceptable quantitative and qualitative production during dry seasons, good mowing period for Italian ray grass could start at 76 days age, while oat could start being harvested at 68 days. 展开更多
关键词 Counter season forages productivity feeding values lolium multiflorum Avena sativa Madagascar.
下载PDF
氮肥对多花黑麦草产量与品质的影响 被引量:1
18
作者 刘杰 江生泉 《信阳农林学院学报》 2023年第3期87-92,共6页
研究了不同氮肥组合对多花黑麦草(Lolium multiflorum)生长发育、种子产量、草产量及品质的影响,旨在探索最佳氮肥施用方法,提高多花黑麦草的种子产量和草产量。试验结果表明:在参试氮肥组合中,处理T_(10)、T_(11)、T_(12)、T_(13)具有... 研究了不同氮肥组合对多花黑麦草(Lolium multiflorum)生长发育、种子产量、草产量及品质的影响,旨在探索最佳氮肥施用方法,提高多花黑麦草的种子产量和草产量。试验结果表明:在参试氮肥组合中,处理T_(10)、T_(11)、T_(12)、T_(13)具有最高的种子产量,分别为2218.4 kg/hm^(2)、2273.1 kg/hm^(2)、2228.8 kg/hm^(2)、2192.5 kg/hm^(2),与其他处理达到显著差异(P<0.05),处理T_(11)的经济效益最高。多花黑麦草种子产量与各时期氮肥用量的回归方程为y(种子产量)=690.012+6.986x_(1)(三叶期氮肥量)+6.537x_(2)(分蘖期氮肥量)+4.644x 3(抽穗期氮肥量),其增产效应大小为三叶期氮肥>分蘖期氮肥>抽穗期氮肥。各阶段的草产量随着施氮总浓度增大而增大,处理T_(11)在抽穗期、种子成熟期的草产量最大,分为603.24g/m^(2)、1047.92g/m^(2),与其他处理达到显著差异(P<0.05)。粗蛋白最大是处理T_(12)、T_(13),粗脂肪最大是处理T_(10)、T_(11)、T_(12)、T_(13),粗纤维最小是处理T_(11)、T_(13),粗灰分最小是处理T_(10)、T_(11)、T_(12)、T_(13),与其他处理达到显著差异(P<0.05)。综合以上结论,处理T_(11)为最佳氮肥施用方式,所得结论可为多花黑麦草生产的氮肥管理提供技术参考。 展开更多
关键词 多花黑麦草 氮肥 产量 品质
下载PDF
紫花苜蓿根浸提液对3种牧草种子萌发过程的化感作用 被引量:3
19
作者 朱亦朴 李玉萌 +2 位作者 王占彬 赵凌平 赵芙蓉 《草业科学》 CAS CSCD 北大核心 2023年第3期761-768,共8页
以紫花苜蓿(Medicago sativa)为供体植物,采用室内生物学测定法,研究不同浓度(0、2.5、5.0、10.0和20.0g·L^(-1))紫花苜蓿根浸提液对多年生黑麦草(Lolium perenne)、一年生黑麦草(L.multiflorum)和梯牧草(Phleum pratense)3种禾本... 以紫花苜蓿(Medicago sativa)为供体植物,采用室内生物学测定法,研究不同浓度(0、2.5、5.0、10.0和20.0g·L^(-1))紫花苜蓿根浸提液对多年生黑麦草(Lolium perenne)、一年生黑麦草(L.multiflorum)和梯牧草(Phleum pratense)3种禾本科牧草种子萌发过程的化感作用,为探索合理的牧草混播方式提供理论依据。结果表明:在供试浓度范围内,不同浓度的紫花苜蓿根浸提液对3种禾本科牧草种子发芽率、发芽势、发芽指数、活力指数均有明显的抑制作用[化感效应指数(RI)<0],对根长和苗高有低浓度促进、高浓度抑制的作用。3种禾本科牧草对紫花苜蓿化感作用的相应有一定差异,在根浸提液的作用下,多年生黑麦草和一年生黑麦草的化感综合效应指数均为负值,表现为明显的抑制作用[化感综合效应指数(SE)<0];而梯牧草种子萌发生长呈低浓度促进、高浓度抑制趋势。研究结果表明,相较于多年生黑麦草和一年生黑麦草,梯牧草对紫花苜蓿化感抑制作用的适应性和抵抗能力更强,更适合与紫花苜蓿混播。 展开更多
关键词 紫花苜蓿 浸提液 化感作用 多年生黑麦草 一年生黑麦草 梯牧草
下载PDF
两种草坪草混播青绿苔草对草皮质量的影响 被引量:2
20
作者 刘炀 韩朝 +3 位作者 王晔 武菊英 滕文军 范希峰 《北方园艺》 CAS 北大核心 2023年第15期51-58,共8页
以青绿苔草(Carex breviculmis)、一年生黑麦草(Lolium multiflorum)、草地早熟禾(Poa pratensis)为试材,采用温室直播的草皮生产方法,研究了不同播种量(4、8、12 g·m^(-2))的一年生黑麦草、草地早熟禾分别与10 g·m^(-2)的青... 以青绿苔草(Carex breviculmis)、一年生黑麦草(Lolium multiflorum)、草地早熟禾(Poa pratensis)为试材,采用温室直播的草皮生产方法,研究了不同播种量(4、8、12 g·m^(-2))的一年生黑麦草、草地早熟禾分别与10 g·m^(-2)的青绿苔草混播,以期确定二者与青绿苔草混播生产草皮的适宜播种量。结果表明:一年生黑麦草播种量由4 g·m^(-2)上升至12 g·m^(-2),混播草皮的成卷时间、盖度、均一度、地下部生物量等指标均显著提升(P<0.05);草地早熟禾播种量在达8 g·m^(-2)后,进一步增加其用量混播草皮的各项指标除青绿苔草分蘖数比重外均无显著变化。综合生产成本考虑,在该研究条件下2种冷季型草与青绿苔草混播适宜播量分别为青绿苔草10 g·m^(-2)+一年生黑麦草12 g·m^(-2);青绿苔草10 g·m^(-2)+草地早熟禾8 g·m^(-2)。 展开更多
关键词 青绿苔草 一年生黑麦草 草地早熟禾 无土草皮 混播
原文传递
上一页 1 2 14 下一页 到第
使用帮助 返回顶部