Effects of Planting Methods and Tillage Systems on Soil Structure and Water Use Efficiency

被引：0
|
作者：
Zhang X. [1 ]
Zhang Y. [1 ]
Liu D. [1 ]
Du H. [1 ]
Li J. [2 ]
Wang X. [1 ]
机构：
[1] College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi
[2] College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2019年 / 50卷 / 03期
关键词：
Planting methods; Soil organic carbon; Tillage systems; Water use efficiency; Water-stable aggregate;
D O I：
10.6041/j.issn.1000-1298.2019.03.027
中图分类号：
学科分类号：
摘要：
Based on a 9-year field experiment, the effects of tillage systems on water-stable aggregate content, soil organic carbon (SOC) content, wheat yield and soil water use efficiency (WUE) were investigated under the two planting methods (wheat continuous cropping and wheat/maize rotation ) in dark loess of Weibei Highland. The results showed that the content of water stable macroaggregate with diameter lager than 0.25 mm (R0.25), mean weight diameter (MWD), SOC content, the aggregate-associated organic carbon of all size classes and water use efficiency (WUE) under wheat/maize rotation were mostly higher than those under the wheat continuous cropping in 0~20 cm soil layer. Compared with the conventional tillage, the measures of no-tillage (NN), subsoiling (SS) and no-tillage-subsoiling (NS) mainly increased soil R0.25, SOC, the aggregate-associated organic carbon of all size classes and the contribution of soil organic carbon in water stable macroaggregate with a diameter lager than 0.25 mm to total soil organic carbon (ISOC0.25) in 0~10 cm soil layer. In the soil layer below 10 cm, the SOC content of NS treatment was increased, and the measures of NS also increased soil R0.25, the aggregate-associated organic carbon of all size classes and ISOC0.25 in soil layer of 35~50 cm. Compared with the conventional tillage, the measures of NS increased wheat yield and WUE significantly, by 14.25% and 19.30% for wheat yield, by 24.98% and 9.89% for WUE in wheat continuous cropping and wheat/maize rotation, respectively. Generally, compared with the wheat continuous cropping, wheat/maize rotation was more beneficial to improving soil structure, increasing SOC content and WUE;and the tillage of NS was the most suitable measure for the local soil conditions. © 2019, Chinese Society of Agricultural Machinery. All right reserved.
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页码：250 / 261
页数：11
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