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This article in SSSAJ

  1. Vol. 76 No. 1, p. 230-240
     
    Received: Mar 23, 2011


    * Corresponding author(s): ouyz@igsnrr.ac.cn
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doi:10.2136/sssaj2011.0107

Effects of Tillage and Residue Management on Soil Organic Carbon and Total Nitrogen in the North China Plain

  1. Ruixing Houa,
  2. Zhu Ouyang *b,
  3. Yunsheng Lib,
  4. Donald D. Tylerc,
  5. Fadong Lid and
  6. Glenn V. Wilsone
  1. a Key Lab. of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China, and, Yucheng Comprehensive Exp. Station, China Academy of Science, Beijing 100101, Chinaand, Graduate Univ. of Chinese Academy of Sciences, Beijing 100049, China
    b Key Lab. of Ecosystem Network Observation and Modeling, Institute of Geographic, Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China, and, Yucheng Comprehensive Exp. Station, China Academy of Science, Beijing 100101, China
    c Dep. of Biosystems Eng. and Soil Sci., Univ. of Tennessee. 605 Airways Blvd, Jackson, TN 38301
    d Key Lab. of Ecosystem Network Observation and Modeling, Institute of Geographic, Sciences and, Natural Resources Research, Chinese Academy of Sciences, Beijing , 100101, China, and, Yucheng Comprehensive Exp. Station, China Academy of Science, Beijing 100101, China
    e USDA-ARS, National Sedimentation Lab. Oxford, MS 38655

Abstract

A suitable tillage-residue management system is needed in the North China Plain (NCP) that sustains soil fertility and agronomic productivity. The objectives of this study were to determine the effects of different tillage-residue managements for a winter wheat (Triticum aestivum L.) and summer maize (Zea mays L.) double-crop system on soil organic carbon (SOC) and total N pools. No-tillage with residue cover (NTR), no-tillage with residue removed and manure applied (NTRRM), and conventional tillage with residue removed (CTRR) were investigated for 6 yr, based on a uniform N application among treatments. Soil samples were collected at six depths and changes in SOC and total N pools were analyzed. Treatments of NTRRM and NTR sequestered more SOC and total N in the 0- to 5-cm depth than CTRR. In the subsoil (5–60 cm), annual SOC sequestration was 0.01 and −0.40 Mg ha−1 yr−1 for NTRRM and NTR, respectively, while CTRR exhibited a significantly positive SOC pool trend. In the whole soil profile (0–60 cm), NTRRM, NTR, and CTRR sequestered SOC at the rates of 0.66, 0.27 and 2.24 Mg ha−1 yr−1. When manure was applied to substitute for the N lost from residue removal, the NTRRM tended to accumulate more SOC than NTR, and had similar accumulation as NTR in total N pools, grain yield, and aboveground biomass. Crop residue could be substituted by manure in this double-crop, irrigated system. Conventional tillage, with residue removed, was suitable in soil fertility and agronomic productivity relative to NTRRM and NTR in the NCP.

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