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Continued No-Till and Subsoiling Improved Soil Organic Carbon and Soil Aggregation Levels

文献类型： 外文期刊

作者： Tian, Shenzhong 1 ; Wang, Yu 2 ; Ning, Tangyuan 1 ; Li, Na 1 ; Zhao, Hongxiang 1 ; Wang, Bingwen 1 ; Li, Zengjia 1 ; Chi, 1 ;

作者机构： 1.Shandong Agr Univ, State Key Lab Crop Biol, Shandong Key Lab Crop Biol, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Tai An 271018, Shandong, Peoples R China

2.Shandong Rice Res Inst, Jinan 2501

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2014 年 106 卷 1 期

页码：

收录情况： SCI

摘要： Tillage and crop residue inputs are important factors that impact soil aggregation and soil organic C (SOC) decomposition. This study evaluated the impacts of tillage and 10 yr of crop residue removal on aggregate stability, distribution, and associated C. The research was conducted in North China between 2002 and 2011. The treatments were five tillage systems that included conventional tillage (CT), subsoiling (ST), harrow tillage (HT), rotary tillage (RT), and no-till (NT) in combination with crop residue retention (P) or reccsidue removal (A). The results indicate that 74 to 82% of aggregates were macroaggregates (0.25-5 mm) and that these aggregates contained from 53 to 87% of the SOC in the 0- to 30-cm depth. Tillage and residue removal reduced macroaggregates and SOC levels, especially under the RT treatment, but residue inputs slowed down the rate of SOC depletion in the soil. The treatments of no-till with residue retention (NTP) and subsoiling with residue retention (STP), accumulated more C in stable macroaggregates and significantly increased SOC levels, which increased 13.37 and 9.59 Mg C ha(-1), respectively, in 10 yr. Crop residue input combined with an appropriate tillage system is an effective method for maintaining and improving low-quality soil and SOC levels in the widespread wheat (Triticum aestivum L.)-maize (Zea mays L.) cropping system of North China.

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