Maize (Zea mays L.) and Cotton (Gossypium hirsutum L.) Straw Decomposition in Soil: Effect of Straw Placement, Mineral Nitrogen and Tillage

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Maize (Zea mays L.) and Cotton (Gossypium hirsutum L.) Straw Decomposition in Soil: Effect of Straw Placement, Mineral Nitrogen and Tillage

机译：土壤中的玉米（Zea mays L.）和棉花（Gossypium hirsutum L.）秸秆分解：秸秆放置，矿质氮和耕作的影响

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With the present understanding that decomposing straw may not only affect soil properties, but pos-sibly greenhouse gas emissions as well, focus among environmental researchers has gradually expanded toinclude understanding of decomposition rate and stability of straw of different plants in different soils underdifferent management conditions. Against such a background, a short-term (60 days) greenhouse simulationexperiment was carried out to study the effects of straw placement, external mineral N source and tillageon straw decomposition of maize and cotton in two contrasting soils, a red soil (Ferrasol) and a black soil(Acrisol). The treatments included straw addition only (T1); straw addition + mineral N (T2); and strawaddition + tillage (T3). Straw was either buried in the soil or placed on the surface. Sampling was doneevery 15 days. Placement, addition of external mineral N sources (urea, 46% N), straw type, soil type andexposure duration (15, 30, 45 and 60 days) affected straw decomposition. Decomposition was more in buriedstraw than in surface-placed straw at all sampling dates in red soil. The addition of an external N sourcesignificantly increased decomposition. The study could not, however, fully account for the effect of tillageon straw decomposition because of the limited effect of our tillage method due to the artificial barrier tomechanical interference supplied by the mesh bags.

机译：基于目前的理解，分解秸秆不仅会影响土壤特性，而且还可能影响温室气体的排放，环境研究人员的关注点已逐渐扩大，包括了解在不同管理条件下不同土壤中不同植物的秸秆的分解速率和稳定性。在这种背景下，进行了短期（60天）温室模拟实验，研究了秸秆放置，外部矿质氮源和耕作对两种对比土壤中的玉米和棉花秸秆分解的影响，这两种土壤是红色土壤（Ferrasol）和黑色土壤（Acrisol）。处理包括仅添加秸秆（T1）;秸秆添加+矿质氮（T2）;和秸秆加成+耕作（T3）。秸秆被埋在土壤中或放在地表。每15天进行一次抽样。放置，外部矿质氮源（尿素，46％N）的添加，秸秆类型，土壤类型和暴露时间（15、30、45和60天）都会影响秸秆的分解。在所有采样日期，在红壤中，地下秸秆中的分解都比表层秸秆中的分解更多。添加外部氮源显着增加了分解。但是，由于网眼袋对机械干扰的人工屏障，我们的耕作方法的效果有限，因此该研究无法完全说明耕作对秸秆分解的影响。

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《土壤圈（英文版）》 |2002年第4期|353-364|共12页
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College of Natural Resources and Environment, Zhejiang University, Hangzhou 310029 China;

College of Natural Resources and Environment, Zhejiang University, Hangzhou 310029 China;

College of Natural Resources and Environment, Zhejiang University, Hangzhou 310029 China;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类土壤学;
关键词
cotton; maize; mineral N; straw decomposition; tillage;

机译：棉花;玉米;矿质氮;秸秆分解;耕作;

Maize (Zea mays L.) and Cotton (Gossypium hirsutum L.) Straw Decomposition in Soil: Effect of Straw Placement, Mineral Nitrogen and Tillage

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