| 秸秆还田下氮肥用量对稻田养分淋洗的影响 |
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| 引用本文： | 汪 军,王德建,张 刚.秸秆还田下氮肥用量对稻田养分淋洗的影响[J].中国生态农业学报,2010,18(2):316-321. |
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| 作者姓名： | 汪 军 王德建 张 刚 |
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| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008;中国科学院研究生院,北京,100049
2. 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 中国科学院知识创新工程项目(KSCX2-YW-N-038和KSCX-YW-440)、国家科技支撑计划课题(2006BAJ10B06)资助 |
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| 摘 要： | 通过田间试验,研究秸秆还田配施氮肥对稻田土壤养分淋洗的影响。结果表明,随氮肥用量增加,田间渗漏水中NH4+-N、NO3--N、全氮浓度随之增加;与秸秆未还田相比,秸秆还田降低了田面水与渗漏水中NH4+-N、NO3--N的浓度;秸秆还田下各处理30cm土层渗漏水中全氮和NO3--N浓度最高,其浓度范围分别为1.09~12.76mg·L-1和0.76~3.74mg·L-1;全磷浓度范围为0.02~0.79mg·L-1,田面水中全磷浓度随施氮量增加而增加,30cm渗漏水中全磷浓度大于60cm渗漏水。氮肥用量180kg·hm-2时,施肥后5~10d内30cm、60cm渗漏水中的养分以NH4+-N为主,其后均以NO3--N为主。氮肥与秸秆配合施用,可降低田面水和渗漏水中的氮磷浓度,改善肥料利用效率。
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| 关 键 词： | 秸秆还田 氮肥 稻田土壤 养分淋洗 |
| 收稿时间： | 2009/3/16 0:00:00 |
| 修稿时间： | 2009/7/27 0:00:00 |
Effect of incorporated straw-nitrogen fertilizer on nutrient leaching in paddy soils |
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| WANG Jun,WANG De-Jian and ZHANG Gang.Effect of incorporated straw-nitrogen fertilizer on nutrient leaching in paddy soils[J].Chinese Journal of Eco-Agriculture,2010,18(2):316-321. |
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| Authors: | WANG Jun WANG De-Jian and ZHANG Gang |
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| Institution: | 1. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | In a field experiment in Changshu Municipality of Jiangsu Province, the effect of incorporated straw-nitrogen fertilization on nutrient leaching in paddy soils was determined. The study shows that NH4+-N, NO3--N and total N concentrations in leachate increase with increasing rates of nitrogen fertilizer. Compared with no-straw treatment, straw treatment presents lower NH4+-N and NO3--N concentrations in surface water and leachate. Total N and NO3--N concentration in leachate collected from 30 cm soil depth ... |
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| Keywords: | Straw treatment Nitrogen fertilizer Paddy soil Nutrient leaching |
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