Crop yield and soil carbon responses to tillage method changes in North China

文献类型： 外文期刊

第一作者： Tian, Shenzhong

作者： Tian, Shenzhong;Ning, Tangyuan;Liu, Zhen;Li, Geng;Li, Zengjia;Tian, Shenzhong;Ning, Tangyuan;Lal, Rattan;Wang, Yu

作者机构：

关键词： Conservation tillage;Deep tillage;Tillage conversion;Crop yield;Soil organic carbon

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： Subsoil compaction at 15-30 cm depths due to the increase of bulk density or decrease in porosity after long-term no tillage or reduced tillage (e.g. rotary tillage or harrow tillage) is of growing concern. Deep tillage is generally regarded as an important method to reduce subsoil compaction due to long-term conservation tillage and thereby improve crop production and soil conditions. We compared the responses of crop yield and soil carbon (C) among 10-year no tillage (NT), rotary tillage (RT), and harrow tillage (HT) treatments, and their conversions to deep tillage (DT) for 4 years involving NT-DT, RT-DT and HT-DT treatments. The soil organic carbon (SOC) pool under the NT treatment was 29 and 91% higher than the SOC pools of the HT and RT treatments, respectively, whereas the NT annual yield decreased by 0.6 Mg ha(-1) yr(-1) over 10 years. The NT-DT, RT-DT and HT-DT treatments increased crop yield by 35, 24 and 24% and altered the SOC pool by-1.5,15.6 and 13.2 Mg ha(-1) over the 4 years of deep tillage compared with the corresponding values for NT, RT, and HT, respectively. Therefore, conversion to DT after long-term NT, RT, and HT use can benefit crop yield and play an important role in improving soil carbon sequestration following the long-term adoption of RT and HT systems in North China. (C) 2016 Elsevier B.V. All rights reserved.

分类号： S1

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