| 太湖地区直播稻田氮素的渗漏损失研究 |
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| 引用本文： | 程文,李勇,朱亮,顾佳,杨林章.太湖地区直播稻田氮素的渗漏损失研究[J].安徽农业科学,2009,37(6):2620-2621. |
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| 作者姓名： | 程文 李勇 朱亮 顾佳 杨林章 |
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| 作者单位： | 1. 河海大学环境科学与工程学院,江苏南京,210098
2. 中科院南京土壤研究所,江苏南京,210008 |
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| 基金项目： | 国家自然科学基金(40601050); 江苏省青蓝工程(2006) |
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| 摘 要： | 目的]研究直播稻田氮素的渗漏损失特点。方法]在丹阳市典型的直播水稻田进行田间试验研究。结果]整个稻季,土壤渗漏液中NO3^--N的浓度在0.07-14.77 mg/L变化,是氮素渗漏流失的主要形态,渗漏液中NH4^＋-N的含量普遍较低,基本低于1.0 mg/L,最高浓度2.41 mg/L,100 cm深处仍有一定浓度的NH4^＋-N存在。水稻生长前期渗漏液中TN和NO3--N的含量较高。整个稻季TN的流失负荷为11.77-35.63 kg/hm^2。硝态氮的流失负荷为5.85-25.78 kg/hm^2,占总流失量的50.12%-75.53%,占稻季总施氮量的7.96%-9.75%。结论]稻田氮素的渗漏损失以NO3^--N为主,NO3^--N的浓度变化曲线随着水稻生长呈逐渐下降的趋势;控制氮肥的施用量能减少氮素的渗漏流失量,但是不会按施肥量减少的比例而减少。
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| 关 键 词： | 直播水稻 氮素 渗漏 流失负荷 |
Research on the Loss of Nitrogen in Direct-seeding Rice Field in Taihu Lake Region |
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| CHENG Wen et al.Research on the Loss of Nitrogen in Direct-seeding Rice Field in Taihu Lake Region[J].Journal of Anhui Agricultural Sciences,2009,37(6):2620-2621. |
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| Authors: | CHENG Wen |
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| Institution: | CHENG Wen et al(College of Environmental Science , Engineering,Hohai University,Nanjing,Jiangsu 210098) |
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| Abstract: | Objective] The characteristics of the loss of nitrogen in the direct-seeding rice field was studied.Method] The experiment was carried out in the typical direct-seeding rice field in Danyang city.Results] The amount of nitrogen loss in the field in rice season was 0.07-14.77 mg/L of NO-3-N,which was the main form of nitrogen,and the form of NH+4-N was generally low(<1.0 mg/L and the maximum concentration= 2.41 mg/L).There was a certain concentration of NH+4-N in the underground soil of 100 cm.The amount ... |
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| Keywords: | Direct-seeding rice Nitrogen Leakage Load of loss |
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