| 稻田土壤中氮素淋失的研究 |
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| 引用本文： | 王家玉,王胜佳,陈义,郑纪慈,李超英,计小江.稻田土壤中氮素淋失的研究[J].土壤学报,1996,33(1):28-36. |
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| 作者姓名： | 王家玉 王胜佳 陈义 郑纪慈 李超英 计小江 |
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| 作者单位： | 浙江省农业科学院, 310021;浙江省农业科学院, 310021;浙江省农业科学院, 310021;浙江省农业科学院, 310021;浙江省农业科学院, 310021;浙江省农业科学院, 310021 |
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| 基金项目： | * 国家计委基金;浙江省自然科学基金 |
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| 摘 要： | 本文应用稻田大型原状土柱渗漏计，研究了双季稻田土壤中氮素随渗漏水流淋失的形态、数量、季节性变化以及若干农化因子的影响。明确了稻田中氮素淋失的基本形态是硝态氮（ＮＯ３＾－－Ｎ），估算出双季稻田中氮素淋失总量可接近３０ｋｇＮ／ｈａ，同时肯定了农田施用氮肥对地下水体环境可能的ＮＯ３＾－－Ｎ污染，建议双季稻田中每季水稻的氮肥用量宜控制在１５０ｋｇＮ／ｈａ；本文还证实氮肥用量对氮素淋失有明显影响，不同氮肥品
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| 关 键 词： | 氮素淋失 渗漏计 环境保护 稻田土壤 |
| 收稿时间： | 1995/7/31 0:00:00 |
STUDY ON THE NITROGEN LEACHING IN RICE FIELDS |
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| Wang Jiayu,Wang Shengji,Chen Yi,Zheng Jici,Li Chaoying and Ji Xiaojiang.STUDY ON THE NITROGEN LEACHING IN RICE FIELDS[J].Acta Pedologica Sinica,1996,33(1):28-36. |
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| Authors: | Wang Jiayu Wang Shengji Chen Yi Zheng Jici Li Chaoying and Ji Xiaojiang |
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| Institution: | Institute of Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021;Institute of Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021;Institute of Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021;Institute of Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021;Institute of Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021;Institute of Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021 |
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| Abstract: | Nitrogen leaching loss from double cropping rice fields was observed using a lysimeter system during 1991-1994. The main results are summarized as follows:1.The basic form of nitrogen leached from rice fields-was nitrate nitrogen(NO3--N) rather than ammonium nitrogen (NH4+-N),so the N fertilizer applied in rice fields could result in the nitrate pollution to underground water due to N leaching.2. N application showed an obvious effect on NH4-N concentrations in the percolateing soil depth of at 10-16cm, and a rather high NH4+-N concentration occurred in urea plot compared with the NH4HC03 plot, suggesting the possibility of more N-leaching in NH4HC03 plot than in urea plot.3. The NO3--N level in the percolating at water soil depth of 90-96cm was consistently higher in the NH4HCO3 plot than in the urea plot, which may be ascribed to the obvious dif ference of transformation dynamics between NH4HCO3 and urea. 4. Under the conditions of an application rate of 300 kg urea-Nha-1 and a percolation of 540 mm, a NO3--N leaching of about 23 kg ha-1 and a NO3--N+NH4+-N leaching load of nearly 27 kg ha-1 were estimated for double-rice cropping paddy. 5. Based on the observed peak levels of 9 to 11 mg NO3--N L-1 during a certain period of time and the limit of 10 mg NO3--N L-1 in drinking water derived from underground water, we recommended a application limit of 150 kg Nha-1 per rice-cropping season. |
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| Keywords: | Nitrogen leaching Lysimeter Urea Ammonium bicarbonate Environmental quality |
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