水土保持学报2017，Vol.31Issue(6)：170-175,6.DOI:10.13870/j.cnki.stbcxb.2017.06.028
有机物料对稻田土壤团聚体及有机碳分布的影响
Effect of Organic Materials Application on Soil Aggregate and Soil Organic Carbon in Rice Fields
摘要
Abstract
By using a combination of multiple soil fractionation methods which does not destroy the basic structure of organic carbon physics group,a five consecutive years experiment was conducted to evaluate the effects of various types of organic materials,such as milk vetch,rice straw and organic poultry manure on soil organic carbon and its physical componets in paddy fields.The results shows that,soil aggregate was mainly distribution in the grade 2～0.25 mm and 0.25～0.053 mm,and the aggregate particle organic carbon concentration decreased with the decrease of particle size.The organic carbon storage in the 0.25～0.053 mm and ＜0.053 mm particle size aggregates increased by using different organic materials,and the treatment with milk vetch,straw and organic fertilizer all increased the amount of soil organic carbon.The results indicate that the organic material returning to the paddy soil can greatly increase the carbon storage in the soil micro aggregates.Returning organic material to the paddy soil increased the concentration oflight fraction particles and reduced the concentration of the heavy fraction particles in soil.Organic materials application in the paddy soil is helpful for the formation of light fraction particles in soil.Among the different physical fractions in soil used for rice cultivation,light fraction organic carbon correlated significantly with ＞0.25 mm aggregate organic carbon and ＜ 0.053 mm aggregate organic carbon and highly significantly with aggregate organic carbon in the 2～0.25 mm size fraction.Returning organic material in the paddy soil can promote the formation and development of soil aggregates and the fixation of organic carbon,effectively improve the soil micro aggregates and light fraction content,and increase the soil carbon storage in micro aggregates and light fraction organic carbon reserves,change the composition characteristics of organic carbon in paddy soil.关键词
稻田土壤/有机碳/土壤团聚体/水稻秸秆/紫云英/有机肥Key words
paddy soil/organic carbon/soil aggregate/rice straw/milk vetch/organic poultry manure分类
农业科技引用本文复制引用
俞巧钢,杨艳,邹平,叶静,张康宁,顾国平,马军伟,符建荣..有机物料对稻田土壤团聚体及有机碳分布的影响[J].水土保持学报,2017,31(6):170-175,6.基金项目
国家重点研发计划项目(2016YFD0800500) （2016YFD0800500）
浙江省重大科技专项重点农业项目(2015C02011 （）
2015C02013) （）
国家自然科学基金项目(31172030) （31172030）
