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首页> 外文期刊>Nutrient Cycling in Agroecosystems >Crop residue, manure and fertilizer in dryland maize under reduced tillage in northern China: II nutrient balances and soil fertility
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Crop residue, manure and fertilizer in dryland maize under reduced tillage in northern China: II nutrient balances and soil fertility

机译：中国北方减耕的旱地玉米的作物残留，肥料和肥料：II养分平衡和土壤肥力

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摘要

A long-term experiment was carried out in the dryland of northern China to assess the effects of applications of maize stover, cattle manure and NP (1:0.44) fertilizer on partial nitrogen (N), phosphorus (P) and potassium (K) balances, extractable soil N (SEN), P and K, and soil organic matter (SOM) in a spring maize cropping system, under reduced tillage conditions. The experiment was set-up according to an incomplete, optimal design, with three factors at five levels and 12 treatments, including a control with two replications. Statistical analyses using multiple regression models showed that the partial N, P and K balances were strongly influenced by annual variations in the amounts of soil water at seeding (SWS) and growing season rainfall (GSR). Most treatments had positive P but negative N and K balances. Cumulative P and K balances were reflected in extractable soil P (P-Olsen) and K (exchangeable K), but the weak relationships indicated that the sorption of P and buffering of K were strong. Cumulative balances of effective organic carbon (C) were weakly related to soil organic C (SOC) content after 12 years. Negative C balances were related to decreases in SOC, but positive C balances were not translated into increases in SOC. The analysis of nutrient balances and soil fertility indices revealed that nutrient inputs in most treatments were far from balanced. It is concluded that the concepts of ‘ideal soil fertility level’ and ‘response nutrient management’ provide practical guidelines for improving nutrient management under the variable rainfall conditions of dry land areas in northern China.
机译：在中国北方的干旱地区进行了一项长期试验，以评估玉米秸秆，牛粪和NP（1：0.44）肥料对部分氮（N），磷（P）和钾（K）施用的影响减少耕作条件下春季玉米种植系统中的平衡，可提取的土壤氮（SEN），磷和钾以及土壤有机质（SOM）。实验是根据不完全，最佳的设计进行的，其中三个因素分五个级别和12种处理方法，其中包括一个具有两次重复的对照。使用多元回归模型进行的统计分析表明，部分N，P和K平衡受播种期（SWS）和生长季降雨量（GSR）的土壤水量年变化的强烈影响。大多数疗法的P值为正，而N和K值为负。累积性P和K平衡反映在可萃取土壤P（P-Olsen）和K（可交换K）中，但弱的关系表明P的吸附和K的吸收很强。 12年后，有效有机碳（C）的累积平衡与土壤有机碳（SOC）含量之间的关系微弱。负C平衡与SOC降低有关，但正C平衡未转化为SOC升高。对养分平衡和土壤肥力指数的分析表明，大多数处理中的养分投入远未达到平衡。结论是，“理想土壤肥力水平”和“响应养分管理”的概念为改善中国北方干旱地区降雨条件变化下的养分管理提供了实用指南。

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  • 来源
    《Nutrient Cycling in Agroecosystems》 |2007年第1期|17-34|共18页
  • 作者

    Xiaobin Wang; Willem B. Hoogmoed; Dianxiong Cai; Udo D. Perdok; Oene Oenema;

  • 作者单位

    Institute of Agricultural Resources and Regional Planning and Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling Chinese Academy of Agricultural Sciences 12 Zhongguancun Nandajie 100081 Beijing China;

    Farm Technology Group Wageningen University P.O. Box 43 6700 AA Wageningen The Netherlands;

    Institute of Agricultural Resources and Regional Planning and Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling Chinese Academy of Agricultural Sciences 12 Zhongguancun Nandajie 100081 Beijing China;

    Farm Technology Group Wageningen University P.O. Box 43 6700 AA Wageningen The Netherlands;

    Environmental Sciences Wageningen University P.O. Box 8005 Wageningen The Netherlands;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Crop residue; Dryland; Fertilizer; Maize; Manure; Nitrogen; Nutrient balances; Nutrient management; Soil fertility; Soil organic carbon;

    机译：作物残渣;旱地;肥料;玉米;肥料;氮;养分平衡;养分管理;土壤肥力;土壤有机碳;

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