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施N肥对会同杉木人工林N、P含量的影响
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作者 赵月 陈婵 陈安娜 《湖南林业科技》 2016年第3期49-55,共7页
以湖南会同杉木基地Ⅱ号集水区杉木人工林为研究对象,对其进行施N肥实验,并进行一年期采样,测定不同施肥处理下N肥对杉木林N、P含量的影响及杉木器官与土壤N、P含量之间的相关关系。结果表明:施肥能够提高杉木土壤、细根、叶片的N和P含... 以湖南会同杉木基地Ⅱ号集水区杉木人工林为研究对象,对其进行施N肥实验,并进行一年期采样,测定不同施肥处理下N肥对杉木林N、P含量的影响及杉木器官与土壤N、P含量之间的相关关系。结果表明:施肥能够提高杉木土壤、细根、叶片的N和P含量,其中施N肥25 g/m^2能提高土壤的N、P含量,施N肥25g/m^2比施N肥5 g/m^2和15 g/m^2更能提高土壤中细根的N、P含量,施N肥5 g/m^2比施N肥15 g/m^2和25 g/m^2对提高叶片中的N含量的效果好,施N肥并未提高凋落物N含量。会同杉木人工林氮磷含量的增加说明施肥能够促进杉木林的生长。 展开更多
关键词 施n肥 杉木人工林 氮磷含量
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不同氮肥配施方法下稻草还田短期效应研究 被引量:9
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作者 彭娜 王凯荣 +1 位作者 王开峰 谢小立 《中国生态农业学报》 CAS CSCD 2007年第4期64-67,共4页
为探索适宜稻草还田量及配合稻草还田的N、P肥施用方法,通过盆栽试验,采用树脂法和传统化学法相结合,研究了不同N肥配施方法下稻草还田对土壤N、P养分及水稻生长的短期影响。结果表明:稻草还田短期内可降低土壤氨氮浓度,提高土壤有效磷... 为探索适宜稻草还田量及配合稻草还田的N、P肥施用方法,通过盆栽试验,采用树脂法和传统化学法相结合,研究了不同N肥配施方法下稻草还田对土壤N、P养分及水稻生长的短期影响。结果表明:稻草还田短期内可降低土壤氨氮浓度,提高土壤有效磷浓度,抑制水稻生长;稻草还田的这3种效应都随稻草水平的增加而加强,但不同N肥配施下无差异。稻草还田后易引起水稻铁中毒,因此稻草还田量不宜过多;稻草还田后除需多施N、P肥外,还需通过排水等措施以解决其铁毒效应。 展开更多
关键词 稻草还田 n方法 水稻生长 土壤n P养分
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不同密肥条件下通粳981产量构成因子分析 被引量:1
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作者 周根友 杨红燕 +1 位作者 夏华 陈启康 《安徽农业科学》 CAS 2017年第28期47-49,共3页
[目的]探明不同生产条件下穗数、粒数、粒重对产量的影响。[方法]对通粳981在不同密度和肥料条件下形成的产量及其构成因子进行回归、相关和通径分析。[结果]穗数、粒数和粒重对产量均有极显著的增产效应,其增产效应从大到小依次为穗数... [目的]探明不同生产条件下穗数、粒数、粒重对产量的影响。[方法]对通粳981在不同密度和肥料条件下形成的产量及其构成因子进行回归、相关和通径分析。[结果]穗数、粒数和粒重对产量均有极显著的增产效应,其增产效应从大到小依次为穗数、粒数、粒重,其中穗数对产量起主要作用;但在基本苗较多或施N量较大的情况下,穗数和粒数的增产作用都很重要。[结论]农业生产中可针对不同生产栽培条件,从产量构成因子中明确主攻目标,合理制定栽培技术措施,提高产量。 展开更多
关键词 通粳981 基本苗 施n肥 穗数 粒数 粒重 产量
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Effect of Different Fertilization Patterns on Carbon and Nitrogen Components of Tobacco Topsoil 被引量:5
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作者 吕强 熊瑛 +2 位作者 许灵杰 赵二卫 杨双剑 《Agricultural Science & Technology》 CAS 2014年第7期1156-1159,1182,共5页
In order to explore the fertilizing ways and dynamic changes of soil carbon and nitrogen in the main producing areas of tobacco in Guizhou,research was conducted to study the variations of dissolved organic carbon and... In order to explore the fertilizing ways and dynamic changes of soil carbon and nitrogen in the main producing areas of tobacco in Guizhou,research was conducted to study the variations of dissolved organic carbon and nitrogen,total organic carbon and nitrogen and their ratio of tobacco-topsoil in organic fertilization pattern and conventional cultivation pattern (No fertilizer as control) by pot experiment.The results were as follows:(1) The effects of different fertilization patterns on soil dissolved organic carbon and nitrogen and total organic carbon and nitrogen were significantly different.The content of DOC,DON,TOC and TON in tobaccotopsoil was decreased with the advancing of growth period in conventional fertilization pattern.In the conventional fertilization pattern,the accumulation of DOC and TOC was increased first and then decreased,and the accumulation of DON and TON was decreased first and then increased.(2) The TOC content at the different growing stage and DOC content at the middle and later stage of tobacco were significantly improved in organic fertilization patterns.The accumulation of DON and TON in the conventional fertilization pattern was significantly higher than those in the organic fertilizer pattern and control at the rosette stage and vigorous stage.In the harvest period,the content of DOC,DON,TOC and TON of tobacco-topsoil in the conventional fertilization and organic fertilization pattern was significantly higher than those in the control.(3)The DOC/DON ratio and the TOC/TiON ratio was increased gradually with the advancing of growth period in conventional fertilization pattern,but they were increased first and then decreased in the organic fertilization pattern and CK.The DOC/DON and TOC/TON ratio of tobacco-topsoil in different fertilization patterns was showed as Y J> CK> CG at the different growing stage.The experiment results revealed that:The organic fertilization pattern may improve significantly the accumulation of DOC,DON,TOC and TON of tobacco-topsoil at the middle and later stage and the DOC/DON and TOC/TON ratio at the different growth stage.It contributed to the continuous and balanced supply of nutrients at the middle and later stage of tobacco and the soil fertility. 展开更多
关键词 Fertilization pattern C/n ratio Dissolved organic carbon and nitrogen Total organic carbon and nitrogen TOBACCO
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Effect Models of Nitrogen,Phosphorus and Potassium Fertilizer Formulation in Banana 被引量:1
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作者 匡石滋 田世尧 +3 位作者 李春雨 易干军 洪炎龙 万国富 《Agricultural Science & Technology》 CAS 2010年第9期130-135,共6页
[Objective] The aim was to modify the application amount of N,P and K fertilizer so as to provide a reference for establishing balanced fertilization index system of banana.[Method]The N,P and K fertilizer "3414" te... [Objective] The aim was to modify the application amount of N,P and K fertilizer so as to provide a reference for establishing balanced fertilization index system of banana.[Method]The N,P and K fertilizer "3414" test was carried out on banana,and then regression analysis was performed on the fertilizer effect.Ternary quadratic,binary quadric and one-variable quadratic regression equations for the fertilizer effect on the banana yield were constructed.[Result]Suitable amount of N,P and K fertilizer had significant yield improving effect,whereas overdose of fertilizer application led to decreasing of utilization rate of fertilizer.Therefore,suitable amount of N,P and K fertilizer should be selected in production.It could be concluded that one-variable quadratic regression equations was the best model to calculate the suitable fertilizer amount.The best yield range of banana in the tested field was 44.193-45.904 t/hm2,while the corresponding optimum application amount of N,P2O5 and K2O was 795.1,262.3 and 1 236.9 kg/hm2 respectively,and the ratio among nitrogen,phosphorus and potassium are 1∶0.33∶1.55.[Conclusion]The result in this study could provide references for the soil types similar to the tested field. 展开更多
关键词 BAnAnA nITROGEn Phosphorus and potassium fertilization Fertilizer application model Optimum application amount
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Effects of Density, Fertilizer and Chemical Control on Yield of Japonica Variety 'Tongyoujing 1' and Technology Optimization
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作者 周根友 夏华 陈启康 《Agricultural Science & Technology》 CAS 2017年第7期1222-1227,共6页
The effects of different basic seedlings, N application rates and paclobutrazol measures on the development and yield of Tongyoujing 1 population were studied through the D-saturated optimum regression design tests. T... The effects of different basic seedlings, N application rates and paclobutrazol measures on the development and yield of Tongyoujing 1 population were studied through the D-saturated optimum regression design tests. The results showed thatthe effects of various factors on yield under the experimental conditions were in order of N application rate basic seedlings paclobutrazol dosage. The increases of basic seedlings and N application rate are beneficial to the increases of population quantity and tiller density, and could improve number of panicles per unit area and increase the population leaf area and accumulated amount of dry matter.However, too-high basic seedlings and N application rate would reduce reproductive tiller percentage and economic coefficient, and prolong growth duration. Proper basic seedlings could coordinate the correlation between tiller density and productive tiller percentage, ensure higher leaf area and dry matter accumulation at filling stage,and improve yield of Tongyoujing 1. According to the multivariate nonlinear regression analysis of yield with various factors, Tongyoujing 1 could reach its maximum yield potential of 12 606.0 kg/hm2 under the basic seedlings of 55.2×104/hm2, N application rate at 339.2 kg/hm2, and paclobutrazol dosage of 97.9 g/hm2. The comprehensive agricultural measures for a yield higher than 11 250 kg/hm2were: basic seedlings 52.6 ×10^4-60.1 ×10^4/hm2, N application rate 328.0-356.1 kg/hm2, and paclobutrazol dosage 87.6-104.6 g/hm2. 展开更多
关键词 Tongyoujing 1 Basic seedling n application rate PACLOBUTRAZOL YIELD
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Analysis of Yield Components of Japonica Rice Tong Jing 981 under Different Density and Fertilization Conditions
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作者 Genyou ZHOU Hongyan YANG +1 位作者 Hua XIA Qikang CHEN 《Agricultural Science & Technology》 CAS 2017年第10期1921-1924,共4页
The yield and yield components of Japonica variety Tongjing 981 under different density and fertilization levels were studied through regression and correlation and path analysis. The results showed that the number of... The yield and yield components of Japonica variety Tongjing 981 under different density and fertilization levels were studied through regression and correlation and path analysis. The results showed that the number of panicles per unit area, number of filled grains per panicle and 1 000-grain weight all had very significant yield increasing effects, and the number of panicles per unit area played a leading role. However, the yield increasing effects of the number of panicles per unit area and number of filled grains per panicle are equally important when the basic seedlings are more or the N fertilizer application rate is large. In practical production, a major factor should be determined among the yield components, and rational cultivation measures should be taken accordingly, to improve yield. 展开更多
关键词 Tongjing 981 Basic seedling n application rate number of panicle per unit area number of filled grains per panicle 1 000-grain weight Yield
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施氮肥对落叶松和水曲柳人工林土壤动物群落的影响 被引量:11
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作者 庄海峰 孙玥 +2 位作者 谷加存 许旸 王政权 《生物多样性》 CAS CSCD 北大核心 2010年第4期390-397,429-430,共8页
土壤动物对环境变化反应敏感,全球变化导致土壤氮(N)有效性增加将影响土壤动物群落结构和功能。本文以落叶松(Larix gmelinii)和水曲柳(Fraxinus mandshurica)人工林为研究对象,通过施肥处理,在不同季节和土层取样,研究土壤N有效性增加... 土壤动物对环境变化反应敏感,全球变化导致土壤氮(N)有效性增加将影响土壤动物群落结构和功能。本文以落叶松(Larix gmelinii)和水曲柳(Fraxinus mandshurica)人工林为研究对象,通过施肥处理,在不同季节和土层取样,研究土壤N有效性增加对土壤动物的数量、类群数和不同功能团的影响。结果表明:(1)施肥影响两林分土壤动物密度,导致当年密度增加,翌年则下降,这种先增加后降低的趋势在不同土层中均表现出来;(2)施肥增加了两林分土壤动物类群数,其中落叶松林分从34类增加到43类,水曲柳林分从43类增加到48类;(3)施肥改变了两林分不同食性土壤动物的密度,腐食性土壤动物数量降低、植食性数量增加、捕食性数量变化不明显。这些结果说明:土壤N有效性增加显著影响两林分土壤动物群落结构,可能改变地下碳分配格局和养分循环过程。 展开更多
关键词 施n肥 土壤动物密度 类群数 食性 土钻法
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“台南13”秋播高产因素与产量的相关性的研究
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作者 卢建坤 卢春生 《龙岩学院学报》 2006年第3期74-77,共4页
对加工型花生“台南13”进行播期(A)、穴粒数(B)、密度(C)、及施氮量(D)四因素正交高产试验表明:最优组合为A_1B_3C_1D_3,播期和密度的极差R′分居第一、二位是影响花生产量的关键因子。其次是穴粒数,影响最小的是施肥。同时,还就各因... 对加工型花生“台南13”进行播期(A)、穴粒数(B)、密度(C)、及施氮量(D)四因素正交高产试验表明:最优组合为A_1B_3C_1D_3,播期和密度的极差R′分居第一、二位是影响花生产量的关键因子。其次是穴粒数,影响最小的是施肥。同时,还就各因素对产量结构、植株性状等生理特性的影响,作了简要分析。 展开更多
关键词 台南13 播期 密度 穴粒数 施n肥
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几种培育措施对河西走廊盐化草地影响的研究 被引量:4
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作者 沈禹颖 李昀 阎顺国 《中国草地》 CSCD 1998年第6期7-11,20,共6页
在连续3年的定位研究中:(1)对以芦苇+海韭菜为主要的草地进行施肥、划破草皮和刈割等培育措施。结果表明,施肥可提高草地质量,当施N量不超过300kg/hm2时,草地产量随施N量的增加而增加;最佳的刈割时间为秋季;采用... 在连续3年的定位研究中:(1)对以芦苇+海韭菜为主要的草地进行施肥、划破草皮和刈割等培育措施。结果表明,施肥可提高草地质量,当施N量不超过300kg/hm2时,草地产量随施N量的增加而增加;最佳的刈割时间为秋季;采用的划破草皮的方法对草地质量无显著的影响。(2)在芦苇+赖草为主的草地中,研究了3个不同的灌溉频率处理对草地植被和土壤水盐含量的影响。草地土壤含盐量随灌溉次数的增加而降低;连续灌溉第3年时,草地产量随灌溉次数的增加而增加,年灌溉1次、2次、3次的草地产量分别为141g/m2、178g/m2和211g/m2,年灌溉3次使某些一年生盐生植物如盐角草的数量有所增加,表明灌水在造成土壤水盐含量变化的同时进一步引起了植被的演替变化。 展开更多
关键词 施n肥 盐化草地 划破草地 灌溉
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矮嵩草草甸氮素利用率对养分添加与冬季增雪的短期响应 被引量:8
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作者 魏晴 周华坤 +3 位作者 姚步青 王文颖 刘泽华 赵新全 《生态学杂志》 CAS CSCD 北大核心 2015年第2期491-496,共6页
研究设4个实验处理[冬季增雪(W)、施N肥、施P肥和对照],通过15N稳定性同位素标记研究短期内增施氮磷肥及水分对青藏高原矮嵩草(Kobresia humilis)草甸氮素利用率的影响。结果表明:群体水平上,植物地上部分15N绝对浓度最高;土壤中氮素残... 研究设4个实验处理[冬季增雪(W)、施N肥、施P肥和对照],通过15N稳定性同位素标记研究短期内增施氮磷肥及水分对青藏高原矮嵩草(Kobresia humilis)草甸氮素利用率的影响。结果表明:群体水平上,植物地上部分15N绝对浓度最高;土壤中氮素残留量较高,说明短期内氮素未被充分吸收利用,且活体植物氮素的吸收利用大于凋落物;氮素利用率为P处理>N处理>W处理>CK。说明养分与水分是限定矮嵩草草甸的氮素利用率的因子,其中养分是最关键因子。 展开更多
关键词 15n标记 冬季增雪 施n肥 P 矮嵩草草甸
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