Testing the modified Rothamsted Carbon Model for paddy soils against the results from long-term experiments in southern China(Soil carbon sequestration)
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概要
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We compared predictions of the modified Rothamsted Carbon Model (RothC) for paddy soils (RothC-26.3_p), with decomposition rate constants set at 0.2 and 0.6 times the values in the original RothC-26.3 for submerged and drained periods, respectively, with the results of five long-term field studies in southern China. These field studies included two paddy-upland rotation sites (Chongqing and Wuchang) and three double rice cropping sites (Wangcheng, Nanchang, and Jinxian). Several treatments (no fertilizer, inorganic fertilizer, and inorganic fertilizer with organic amendments such as straw, green manure, and farmyard manure) were tested at each site. RothC-26.3_p satisfactorily simulated the observed changes in soil organic carbon (SOC) at all paddy-upland rotation sites and in all plots without organic matter application at the double rice cropping sites, but overestimated SOC in plots with organic matter application at double rice cropping sites. We conclude that RothC-26.3_p is suitable for use in China with paddy-upland rotation management and with the regime based on relatively low carbon input at double rice cropping sites. However, for systems with large carbon inputs, RothC needs further modification.
- 一般社団法人日本土壌肥料学会の論文
著者
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Shirato Yasuhito
National Inst. Agro‐environmental Sci. Tsukuba Jpn
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Shi Xiaojun
Southwest Univ. China
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Yagasaki Yasumi
National Institute For Agro-environmental Sciences
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JIANG Guiying
Ministry of Agriculture, Key Laboratory of Crop Nutrition and Fertilization, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences:National Institute for Agro-Environmental Sciences
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NIE Jun
Soil and Fertilizer Institute of Hunan Province
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XU Minggang
Ministry of Agriculture, Key Laboratory of Crop Nutrition and Fertilization, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences
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HUANG Qinghai
Institute of Red Soils of Jiangxi Province
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LI Zuzhang
Institute of Soils, Fertilizers and Agricultural Resources, Jiangxi Academy of Agricultural Sciences
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