Maize straw effects on soil aggregation and other properties in arid land

文献类型： 外文期刊

第一作者： Wang, Xiaojuan

作者： Wang, Xiaojuan;Jia, Zhikuan;Yang, Baoping;Ding, Ruixia;Nie, Junfen;Wang, Junpeng;Wang, Xiaojuan;Jia, Zhikuan;Yang, Baoping;Ding, Ruixia;Nie, Junfen;Wang, Junpeng;Liang, Lianyou

作者机构：

关键词： Straw incorporation;Water-stable aggregates;Aggregate stability;Semi-arid region

期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：5.374； 五年影响因子：6.368 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Soil structure has been destroyed due to long-term application of inorganic fertilizer in the Loess Plateau of China. Our objective was to determine how incorporation of three different rates of maize (Zea mays L) straw affected soil aggregate size and stability within the top 30 cm of arid soil on the Loess Plateau of China to provide basic theory of land utilization. Three rates of maize straw (4.5, 9.0, or 13.5 Mg ha(-1), hereafter referred to as LS, MS, and HS) were incorporated with 255 and 90 kg/ha of inorganic N and P fertilizer, respectively, 2 times in a 4-year field experiment. Water stability of five aggregate size classes (>5, 2-5,1-2, 0.5-1, and 0.25-0.5 mm) in the 0-10,10-20, and 20-30 cm depth increments was measured 3 times for each treatment and a check (CK) that received only the inorganic fertilizers. Incorporation of 13.5 Mg ha(-1) of straw significantly increased water stability of three aggregate classes (>5, 1-2, 0.5-1 mm) compared with CK and LS treatments within the surface 10 cm and for aggregates >0.5 mm in the 10-20 cm depth increment. Within the 20-30 cm depth increment water-stablity of aggregates in the 0.25-0.5 mm class increased significantly as the rate of straw incorporation increased. Overall, aggregate stability was primarily increased through changes in microaggregate size distribution, especially for aggregate classes >5, 0.5-1, 0.25-0.5 mm within the 0-10,10-20, 20-30 cm soil depth, respectively. Straw incorporation is a positive and effective agriculture measure to improve soil structure. (C) 2015 Elsevier B.V. All rights reserved.

分类号： S1

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