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不同秸秆还田方式对玉米产量及土壤养分含量的影响
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作者 胡志兰 《农业工程技术》 2023年第10期33-33,35,共2页
为研究不同秸秆还田方式对玉米产量和土壤理化性质的影响,以秸秆不还田为对照,设置秸秆堆腐还田、机械粉碎还田和秸秆压沟还田3种秸秆还田方式,统计各处理玉米产量与土样养分含量。结果表明,秸秆还田能够显著增加玉米行粒数、百粒质量... 为研究不同秸秆还田方式对玉米产量和土壤理化性质的影响,以秸秆不还田为对照,设置秸秆堆腐还田、机械粉碎还田和秸秆压沟还田3种秸秆还田方式,统计各处理玉米产量与土样养分含量。结果表明,秸秆还田能够显著增加玉米行粒数、百粒质量和产量,同时对玉米田土壤全氮、速效磷和速效钾含量也有显著提升作用,秸秆堆腐还田是较适合巍山县的秸秆还田方式。 展开更多
关键词 玉米 秸秆还田 还田方式 产量 土样养分含量 影响 田间试验
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便携式高精度土壤养分光电比色仪研究 被引量:8
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作者 胡建东 段铁城 《计量学报》 EI CSCD 北大核心 2005年第1期77-80,共4页
介绍了一种便携式高精度土壤养分光电比色仪的结构、工作原理和实现方法。土壤养分光电比色仪与一般实验室用仪器不同,它除了完成光电比色浓度测量之外,还内置了温度传感器以便进行温度校正,从而提高对环境的适应性。实测数据表明便携... 介绍了一种便携式高精度土壤养分光电比色仪的结构、工作原理和实现方法。土壤养分光电比色仪与一般实验室用仪器不同,它除了完成光电比色浓度测量之外,还内置了温度传感器以便进行温度校正,从而提高对环境的适应性。实测数据表明便携式高精度土壤养分光电比色仪的性能指标达到和超过了国家有关标准,它体积小、重量轻和操作简单,将会在我国农村基层测土施肥中得到广泛应用。 展开更多
关键词 计量学 便携式光电比色仪 土样养分 微处理机
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精准施肥技术在土壤改良中的应用
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作者 林绍光 《中国农业综合开发》 2004年第8期57-57,共1页
精准施肥是近年来新兴推广的现代农业技术之一。采用精准施肥技术可提高农作物的产量和农产品的品质;增加农作物抗性,减少病虫害的发生;提高肥料利用率,降低生产成本;减少化肥、农药的污染,有利生态平衡,是农业向高产、优质、高... 精准施肥是近年来新兴推广的现代农业技术之一。采用精准施肥技术可提高农作物的产量和农产品的品质;增加农作物抗性,减少病虫害的发生;提高肥料利用率,降低生产成本;减少化肥、农药的污染,有利生态平衡,是农业向高产、优质、高效、安全、生态方向发展的途径。田东县从2003年起将精准施肥技术应用于农业综合开发项目的土壤改良中,取得了良好的效果。其主要技术要点如下: 展开更多
关键词 精准施肥技术 土壤改良 土壤样品采集 土样养分含量测定 施肥量 施肥方法
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Application of Matter-element Model in Soil Nutrient Evaluation of Ecological Fragile Region 被引量:2
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作者 TANG Jie WANG Chenye +3 位作者 LIN Nianfeng LI Zhaoyang LI Haiyi MAO Zilong 《Chinese Geographical Science》 SCIE CSCD 2009年第2期168-176,共9页
On the basis of the soil environment investigation in Da'an City, Jilin Province, China, 40 soil samples from main land use types were obtained and tested by standard method. Soil organic matter (SOM), total N (TN... On the basis of the soil environment investigation in Da'an City, Jilin Province, China, 40 soil samples from main land use types were obtained and tested by standard method. Soil organic matter (SOM), total N (TN), total P (TP), total K (TK), available N (AN), available P (AP) and available K (AK) were chosen as the evaluation factors. A regional soil nutrient evaluation model was developed based on the matter-element model. The results show that the soil samples with nutrient grade Ⅱ-Ⅴ respectively account for 10%, 30%, 32.5% and 27.5%, and those with grade Ⅳ and Ⅴ account for 60% in all samples. The relationship between soil nutrients and land types indicates that the nutrients of farmland are relatively good, with 41.7% of soil samples with the nutrient grade Ⅳ and Ⅴ. The nutrients of saline-alkali land and sandy land are the worst, with 100% of soil samples with the nutrient grade IV and V. And the ratios of soil samples grade IV and V in grassland and wasteland are respectively 62.5 % and 54.55%. Generally speaking, the soil nutrients status in Da'an City is poor, 60% of soil samples are in poor and extremely poor conditions, indicating that the soil has been severely eroded. Being a relatively superior evaluation method with more accurate resuits and spatial distribution consistency, matter-element analysis is more suitable for regional soil nutrient evaluation than previous models. 展开更多
关键词 soil nutrient evaluation matter-element model extension engineering theory ecological fragile region
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Differences in Tree Species Diversity and Soil Nutrient Status in a Tropical Sacred Forest Ecosystem on Niyamgiri Hill Range,Eastern Ghats,India 被引量:5
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作者 Sudam Charan SAHU Nabin Kumar DHAL +1 位作者 Brij LAL Rama Chandra MOHANTY 《Journal of Mountain Science》 SCIE CSCD 2012年第4期492-500,共9页
We have quantitatively analyzed the tree species diversity with respect to soil nutrient status in three sites of a sacred forest ecosystem of Niyamgiri hill range, Eastern Ghats, India. Extensive field surveys and sa... We have quantitatively analyzed the tree species diversity with respect to soil nutrient status in three sites of a sacred forest ecosystem of Niyamgiri hill range, Eastern Ghats, India. Extensive field surveys and sampling were conducted in 3 sites of the hill range: Site 1 Pterocarpus dominated forest (PTF) (19°40'02.2'' N and 83°21'23.1'' E), Site 2 Mangifera dominated forest (MAF) (19°40'02.8'' N and 83°21'40.8'' E) and Site 3 Mixed forest (MIF) (19°36'47.1" N and 83°21'02.7'' E). A total of 28 families, 42 genera, 46 tree species, and 286 individual trees were recorded on an area of0.6 ha. Tree density varied between 470 and 49o individuals ha and average basal area between 3.16 and l0.04 m2 ha-1. Shannon Index (H') ranged from 2.34 to 4.53, Simpson's Index ranged from 0.07 to o.09, and equitability Index ranged from 0.7 to 1.34. The number of individuals was highest in the girth at breast height (GBH) class of 50-7o cm. The soil nutrient status of the three forest types was related to tree species diversity. The soil pH value of the three sites reflected the slightly acidic nature of the area. Species diversity was positively correlated with organic carbon and phosphorus and negatively with nitrogen, EC and pH. The results of the current study may be helpful to further develop a conservation planfor tree species in tropical sacred forest ecosystems. 展开更多
关键词 Tree species diversity Sacred forestecosystem Soil nutrient status Eastern Ghats
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The Facilitation of Restoration by Cushion Plant Androsace tapete in a Degraded Alpine Grassland 被引量:6
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作者 HE Yongtao WANG Fang +4 位作者 NIU Ben WANG Zhipeng LI Meng SHI Peili ZHANG Xianzhou 《Journal of Resources and Ecology》 CSCD 2022年第1期107-112,共6页
The cushion plant Androsace tapete is an endemic species that is widely distributed in the Qinghai-Tibetan Plateau, and also predominant in the alpine grassland that is locally degraded due to overgrazing and other re... The cushion plant Androsace tapete is an endemic species that is widely distributed in the Qinghai-Tibetan Plateau, and also predominant in the alpine grassland that is locally degraded due to overgrazing and other reasons. As an ecosystem engineer cushion plant, its ability to facilitate the restoration of degraded alpine grassland was studied in a degraded alpine grassland at an elevation of 4500 m on the southern slope of the Nyainqentanglha Mountains in Damxung. The species diversity, soil nutrients and water content underneath and outside the cushion plant A. tapete were investigated. The results showed that soil nutrients underneath the A. tapete cushion were significantly increased by about 16%-48% compared to outside the cushion, of which the organic matter and total N were increased by 16.2% and 18.9% respectively, and the soil water content was increased about 12%. The index of species diversity of richness(S), Shannon-Wiener’s H and Simpson’s D all increased with the coverage of cushion plant A. tapete. Our results suggested that this cushion plant can facilitate restoration of the degraded alpine grassland by modifying the local soil environment and increasing the community diversity, so it should be conserved for the restoration of degraded alpine grasslands on the Qinghai-Tibetan Plateau. 展开更多
关键词 cushion plant FACILITATION degraded alpine meadow species diversity soil nutrients
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