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[1]杨莉琳,胡春胜.施肥对华北高产区土壤NO-3-N淋失与作物NO-3-N含量及产量的影响[J].应用与环境生物学报,2003,9(05):501-505.
 SUN Chunyun,et al..Cloning ang sequence analysis of ps1A1 and ps1A2 genes amplified specifically from the chloroplast DNA of maintainer of CMS sorghum[J].Chinese Journal of Applied & Environmental Biology,2003,9(05):501-505.
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施肥对华北高产区土壤NO-3-N淋失与作物NO-3-N含量及产量的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
9卷
期数:
2003年05期
页码:
501-505
栏目:
综述
出版日期:
2003-10-25

文章信息/Info

Title:
Cloning ang sequence analysis of ps1A1 and ps1A2 genes amplified specifically from the chloroplast DNA of maintainer of CMS sorghum
作者:
杨莉琳胡春胜
(2农业部植物营养学重点开放实验室; 教育部植物-土壤相互作用重点实验室;中国农业大学植物营养系北京100094)
Author(s):
SUN Chunyunet al.
(1Research Center Agricultural Resources, Chinese Academy of Sciences, Shijiazhuang050021, China) (2 Key Laboratory of Plant Nutrition, MOA; Key Laboratory of Plant Nutrition, MOE; Department of Plant Nutrition, China Agricultural University, Beijing100094, China)
关键词:
关键词 硝态氮淋失 环境友好 养分管理 营养平衡
Keywords:
Keywords nitrate leaching loss environment protection nutrient management nutrient balance
摘要:
摘要 利用4 a的平衡施肥定位试验,研究太行山山前平原高产区冬小麦、夏玉米轮作制度下施肥对潮褐土中硝态氮的分 布、移动、积累、植株吸收以及作物产量的影响.结果表明,土壤剖面中硝态氮含量与施肥量直接相关,过量施用氮肥使硝 态氮在土壤中大量积累并向下层快速移动;氮磷对作物的养分供应存在着既相互促进又相互竞争的关系,施用适量磷肥可 以促进小麦、玉米对氮素的吸收,提高作物产量,减少氮素在土壤中积累和淋失,但施磷量太高,由于氮磷之间的竞争作 用,作物吸氮量反而下降,从而导致土壤中硝态氮的积累和淋失加剧.施用钾肥抑制了土壤硝态氮积累.促进了两季作物植 株对氮素的吸收.从减少土壤硝态氮积累和淋失的角度,提出该区合理的施肥配比为组合N2P2K2,即ρA(N)=200 kg hm-2, ρA(P)=32.5 kg hm-2,ρA(K)=150 kg hm-2. 图6 参13
Abstract:
Abstract A fouryear experiment was conducted in the meadowcinnamon soil in the field and lysimeters of farmland on the foot of Mt. Taihang in North China to study the effects of fertilization on the distribution, dynamics and accumulation of nitrate in soil, nitrogen uptake by crops and the yields of winter wheat and summer maize that were rotated in this region. The results indicated: the nitrate content and its dynamics were directly correlated with the content of applied nitrogen, i.e, over applied nitrogen could easily lead to accumulation and leaching of nitrate in soil profile; the relationship between nitrogen and phosphorus was of both promotion and competition, i.e., proper application of phosphorus could improve nitrogen absorption by crops and reduce nitrate accumulation and leaching loss in root layers in soil. However, excessive appication of phosphorus could easily lead to nitrate accumulation and leaching loss in soil, especially in the lower layer of the soil. The competition between nitrogen and phosphorus was confined by the results of nitrate absorption by plants. Applying potassium remarkably reduced the nitrate accumulation and leaching loss in soil and improved the nitrogen uptake and yields of winter wheat and summer maize. Thus, the fertilizer contents and ratio of nitrogen, phosphorus and potassium are the key measures for reducing the nitrate accumulation and leaching loss in soil and improving crop yield in this area. The annual fertilization for winter wheat-summer maize were recommended as N2P2K2〔ρA(N)=200 kg hm-2,ρA(P)=32.5 kg hm-2,ρA(K)=150 kg hm-2〕 in this region. Fig 6, Ref 13
更新日期/Last Update: 2001-10-23