| 减施氮肥对稻田土壤剖面养分分布特征的影响 |
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| 引用本文： | 李娟,彭金灵,康娟,周立军,林位夫.减施氮肥对稻田土壤剖面养分分布特征的影响[J].热带作物学报,2012,33(8):1378-1383. |
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| 作者姓名： | 李娟 彭金灵 康娟 周立军 林位夫 |
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| 作者单位： | 1. 中国热带农业科学院橡胶研究所,海南儋州,571737
2. 新疆柯坪县气象局,新疆柯坪,843600 |
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| 基金项目： | 中国热带农业科学院橡胶研究所基本科研业务费专项（No. 1630022011006）；现代农业产业技术体系建设专项（No. CARS-34）。 |
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| 摘 要： | 为探讨减施氮肥对养分在剖面垂直的分布与迁移的影响,采用大田试验,探讨了减施氮肥对稻田剖面养分累积和分布的影响.结果表明:3个处理下土壤剖面养分累积的趋势是:有机质、全氮、全磷、碱解氮、速效磷含量随土层深度的增加而降低,而全钾及速效钾含量则随土层深度的增加而提高.T3(80％的习惯施氮量)处理中除耕层的有效氮、速效磷及速效钾含量较T2(习惯施氮量)处理降低外,土壤其它各层有机质、全氮、全磷、全钾、有效氮、速效磷以及速效钾含量均较T2处理有所增加.T3处理有机质的增加主要集中在0～60 cm土层中,氮素主要集中在0～40 cm土层中,钾素则主要集中在0～20 cm土层中,土壤中各层的磷素在两个施肥处理中无显著差异,说明T3处理增加的养分主要集中在作物能吸收的范围内,这意味着对土壤培肥和作物生产更有利.
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| 关 键 词： | 减施氮肥 土壤养分 剖面分布 水稻田 |
Effects of Nitrogen-reduction on the Soil profile Nutrient Distribution in Paddy Fields |
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| LI Juan,PENG Jinling,KANG Juan,ZHOU Lijun and LIN Weifu.Effects of Nitrogen-reduction on the Soil profile Nutrient Distribution in Paddy Fields[J].Chinese Journal of Tropical Crops,2012,33(8):1378-1383. |
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| Authors: | LI Juan PENG Jinling KANG Juan ZHOU Lijun and LIN Weifu |
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| Institution: | 1 Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,Danzhou,Hainan 571737,China 2 The weather bureau of Keping county,Keping,Xinjiang,843600,China |
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| Abstract: | A field experiment was used to investigate the effects of nitrogen-reduction on the accumulation and distribution of nutrients in paddy field profile.The results indicated that the content of organic matter,total nitrogen,total phosphorus,available nitrogen and phosphorus were decreased with the increase of the soil depth in T1(no nitrogen fertilizer added),T2(conventional fertilization level of local farmers)and T3(80 percentage conventional fertilization level of local farmers)treatments,respectively,while total potassium and available potassium were increased with the increase of the soil depth.Except for available nitrogen,phosphorus and potassium of the top layer soil(0～20 cm),the organic matter,total nitrogen,total phosphorus,total potassium,available nitrogen,phosphorus and potassium of 0～20 cm,20～40 cm,40～60 cm,60～80 cm,80～100 cm soil layer in the profile of 0～100 cm were increased in T3 treatment compared with T2 treatment.The marked increasing quantity of organic matter was mainly on the 3 soil layers at the depth of 0～60 cm,and nitrogen was mainly on the 2 soil layers at the depth of 0～40 cm,and potassium was mainly on the top layer soil(0～20 cm),while T3 and T2 treatment had no significant effect on phosphorus.These results demonstrated that T3 treatment increased the nutrient content that was concentrated primarily in the absorption region of crop.This is important to improve soil fertility and enhance the crop production. |
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| Keywords: | Ntrogen-reduction Soil nutrients Profile distribution Paddy field |
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