Effect of Different Rice-Crab Coculture Modes on Soil Carbohydrates
查看参考文献34篇
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文摘
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Traditional agricultural systems have contributed to food and livelihood security. Rice-crab coculture (RC) is an important eco-agricultural process in rice production in northern China. Recognizing the soil fertility in RC may help develop novel sustainable agriculture. Soil carbohydrates are important factors in determining soil fertility in different culture modes. In this study, soil carbohydrates were analyzed under three different culture modes including rice monoculture (RM), conventional rice-crab coculture (CRC) and organic rice-crab coculture (ORC). Results showed that the contents of soil organic carbon and carbohydrates were signiifcantly higher in the ORC than those in RM. The increasing effect was greater with increased organic manure. Similar tendency was found in CRC, but the overall effect was less pronounced compared with ORC. Carbohydrates were more sensitive to RC mode and manure amendment than soil organic carbon. Compare to RM, the (Gal+Man)/(Ara+Xyl) ratio decreased in all the RC modes, indicating a relative enrichment in plant-derived carbohydrates due to the input of crab feed and manure. While the increasing (Gal+Man)/(Ara+Xyl) ratio in ORC modes with increased organic manure suggested that crab activity and metabolism induced microbially derived carbohydrates accumulation. The lower GluN/MurA ratio in ORC indicated an enhancement of bacteria contribution to SOM turnover in a short term. The ifndings reveal that the ORC mode could improve the quantity and composition of soil carbohydrates, effectively, to ensure a sustainable use of paddy soil. |
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来源
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Journal of Integrative Agriculture
,2014,13(3):641-647 【核心库】
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DOI
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10.1016/s2095-3119(13)60722-4
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关键词
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rice monoculture
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rice-crab coculture
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manure
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carbohydrates
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地址
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1.
College of Land and Environmental Science, Shenyang Agricultural University, Shenyang, 110866
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College of Sciences, Shenyang Agricultural University, Shenyang, 110866
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Institute of Applied Ecology, Chinese Academy of Sciences, State Key Laboratory of Forest and Soil Ecology, Shenyang, 110164
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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2095-3119 |
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学科
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农业基础科学;环境科学基础理论 |
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基金
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was supported by the National Natural Science Foundation of China
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文献收藏号
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CSCD:5097635
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