Relative contribution of maize and external manure amendment to soil carbon sequestration in a long-term intensive maize cropping system
文献类型： 外文期刊
作者： Zhang, Wenju 1 ; Liu, Kailou 2 ; Wang, Jinzhou 1 ; Shao, Xingfang 1 ; Xu, Minggang 1 ; Li, Jianwei 1 ; Wang, Xiujun 3 ; M 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Crop Nutr & Fertilizat, Beijing 100081, Peoples R China
2.Jiangxi Inst Red Soil, Natl Engn & Technol Res Ctr Red Soil Improvement, Jinxian 331717, Peoples R China
3.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA
4.Univ Western Australia, Inst Agr, Sch Earth & Environm, Soil Biol & Mol Ecol Grp, Crawley, WA 6009, Australia
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2015 年 5 卷
页码：
收录情况： SCI
摘要： We aimed to quantify the relative contributions of plant residue and organic manure to soil carbon sequestration. Using a 27-year-long inorganic fertilizer and manure amendment experiment in a maize (Zea mays L.) double-cropping system, we quantified changes in harvestable maize biomass and soil organic carbon stocks (0-20 cm depth) between 1986-2012. By employing natural C-13 tracing techniques, we derived the proportional contributions of below-ground crop biomass return (maize-derived carbon) and external manure amendment (manure-derived carbon) to the total soil organic carbon stock. The average retention of maize-derived carbon plus manure-derived carbon during the early period of the trial (up to 11 years) was relatively high (10%) compared to the later period (22 to 27 years, 5.1-6.3%). About 11% of maize-derived carbon was converted to soil organic carbon, which was double the retention of manure-derived carbon (4.4-5.1%). This result emphasized that organic amendments were necessary to a win-win strategy for both SOC sequestration and maize production.
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