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| 灌溉与施氮对留茬免耕春小麦氮素吸收和氮肥损失的影响 | |
| 引用本文： | 刘青林,张恩和,王琦,王田涛,刘朝巍,尹辉,俞华林. 灌溉与施氮对留茬免耕春小麦氮素吸收和氮肥损失的影响[J]. 水土保持学报, 2011, 25(4): 104-109 |
| 作者姓名： | 刘青林 张恩和 王琦 王田涛 刘朝巍 尹辉 俞华林 |
| 作者单位： | 1. 甘肃农业大学农学院,兰州,730070 2. 甘肃农业大学草业学院,兰州730070／中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室和青藏高原冰冻圈观测试验研究站,兰州730000 3. 甘肃农业大学草业学院,兰州,730070 |
| 基金项目： | 西北内陆灌区农田循环生产技术集成研究与示范(2007BAD89B17) |
| 摘 要： | 在甘肃省石羊河流域绿洲灌区,采用裂区设计大田试验,研究不同灌溉量（常规灌溉（327 mm）、节水20%灌溉（261 mm）、节水40%灌溉（196 mm））和施氮量（0,140,221,300 kg/hm^2）对留茬免耕春小麦植株吸氮量、收获期土壤硝态氮（NO3^--N）含量和氮肥损失的影响。结果表明,在留茬免耕农田中,灌溉量从196 mm增加到327 mm,小麦籽粒含氮量从1.55%增加到1.71%,植株吸氮量从134 kg/hm^2增加到190kg/hm^2。当施氮量超过221 kg/hm^2时,籽粒含氮量、秸秆含氮量、植株吸氮量不再显著增加。施氮300,221,140 kg/hm^2处理的植株吸氮量比不施氮处理的分别提高47%,37%和18%;在春小麦收获期,土壤表层（0-60 cm）NO3^--N含量随灌溉量增加而减少,随施氮量增加而增加,灌溉和施氮对60 cm以下土壤NO3^--N含量影响不明显。与不施氮处理相比,施氮300,221,140 kg/hm^2的氮肥损失分别为186,137,94 kg/hm^2。 |
| 关 键 词： | 灌溉 施氮 植株吸氮量 土壤硝态氮 氮肥损失 |
Effects of Irrigation and Nitrogen Supply Levels on Nitrogen Uptake and Fertilizer Nitrogen Loss of Spring Wheat on No-tillage with Stubble Standing Farmland |
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| LIU Qing-lin,ZHANG En-he,WANG Qi,WANG Tian-tao,LIU Chao-wei,YIN Hui,YU Hua-lin. Effects of Irrigation and Nitrogen Supply Levels on Nitrogen Uptake and Fertilizer Nitrogen Loss of Spring Wheat on No-tillage with Stubble Standing Farmland[J]. Journal of Soil and Water Conservation, 2011, 25(4): 104-109 | |
| Authors: | LIU Qing-lin ZHANG En-he WANG Qi WANG Tian-tao LIU Chao-wei YIN Hui YU Hua-lin |
| Affiliation: | LIU Qing-lin1,ZHANG En-he1,WANG Qi2,3,WANG Tian-tao1,LIU Chao-wei1,YIN Hui2,YU Hua-lin1(1.Agronomy College,Gansu Agricultural University,Lanzhou 730070,2.College of Grassland Science,3.Cryosphere Research Station of Qinghai-Xizang Plateau,Cold and Arid RegionsEnvironmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000) |
| Abstract: | A combination of careful irrigation and nitrogen(N) management is needed to improve N uptake efficiency and to minimize fertilizer N loss in the arid oasis agricultural area of northwest China.A field experiment was conducted to investigate the effects of different irrigation and N application rates on plant N uptake,soil nitrate nitrogen(NO-3-N) distribution in soil profile and fertilizer N loss on no-tillage farmland with standing stubble in the oasis region of Shiyang river basin,Gansu province.The exper... |
| Keywords: | irrigation nitrogen supply plant nitrogen uptake soil nitrate nitrogen fertilize nitrogen loss |
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