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Effect of optimal irrigation, Different fertilization, And reduced tillage on soil organic carbon storage and crop yields in the North China Plain

文献类型： 外文期刊

作者： Zhao, Xiaoning 1 ; Hu, Kelin 2 ; Li, Kejiang 3 ; Wang, Pu 4 ; Ma, Yongliang 2 ; Stahr, Karl 1 ;

作者机构： 1.Univ Hohenheim, Inst Soil Sci & Land Evaluat, D-70593 Stuttgart, Germany

2.China Agr Univ, Dept Soil & Water Sci, Beijing 100193, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Dry Land Farming Inst, Hengshui 053000, Peoples R China

4.China Agr Univ, Dept Agron, Beijing 100193, Peoples R China

关键词： C sequestration;Fertilization;Irrigation;Residue return;SOC storage;The North China Plain;Tillage;Yield

期刊名称：JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE （ 影响因子：2.426； 五年影响因子：3.029 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The objective was to evaluate the effect of different agricultural managements on soil organic C (SOC) storage and crop yields in the North China Plain (NCP). The study was conducted at five experimental stations. Different agricultural managements were designed, including optimal (OPT) and conventional (CON) irrigation and fertilization treatments, different amounts of fertilization application and residue-return treatments, and different tillage practices. Compared to the CON treatment, SOC storage in the 1 m soil profile under the OPT treatment increased by 2 t ha~(-1), 8 t ha~(-1), and 4 t ha~(-1) at Quzhou, Wuqiao, and Dongbeiwang sites, respectively. The annual increasing rate of SOC storages in the topsoil (0-30cm) under the OPT treatments at Wuqiao (0.88 t ha~(-1) y~(-1)), Quzhou (0.93 t ha~(-1) y~(-1)), and Dongbeiwang (1.86 t ha~(-1) y~(-1)) were higher than those in the CON treatments at Wuqiao (0.15 t ha~(-1) y~(-1)), Quzhou (0.54 t ha~(-1) y~(-1)), and Dongbeiwang (0.28 t ha~(-1) y~(-1)), but the difference of grain yields between the two treatments was not significant. The SOC storage in 1 m soil profile in the no-tillage treatment with standing residue return (NT1) at Luancheng increased by 5 t ha~(-1) and 7?t?ha~(-1) compared with rotary-tillage (RT) and conventional-tillage (CT) treatments, respectively, but the crop yield under no-tillage treatment was the lowest. While at Quzhou site, it increased by 3 t ha~(-1) in the top 40cm soil under the NT treatment compared to the CT treatment. The annual increasing rate of SOC storage in the top 30cm under NT treatment was also the highest (1.08 t ha~(-1) y~(-1) at Luancheng, 1.86 t ha~(-1) y~(-1) at Quzhou), compared to the other tillage treatments. At Henghsui site, the combination of the highest fertilization application and highest residue-return treatments got the highest SOC storage and the highest crop yields. We concluded that the agricultural management practices, such as optimal irrigation and fertilization treatment, the higher fertilization, residue return and RT, has significant impact on the SOC storage and agricultural sustainability in the NCP.

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