农业环境科学学报2013，Vol.32Issue(4)：735-740,6.DOI:10.11654/jaes.2013.04.012
耕作方式与秸秆还田对表层土壤活性有机碳组分与产量的短期影响
Short-term Effects of Tillage Practices and Wheat-straw Returned to the Field on Topsoil Labile Organic Carbon Fractions and Yields in Central China
摘要
Abstract
Conservation management practices,such as no-tillage (NT) or crop residue returning,alter soil organic carbon (C) lability,thus affecting soil quality.However,inconsistent effects of conservation management practices on soil labile organic C have been commonly reported.Therefore,a field experiment was conducted to study the effects of tillage practices and wheat-straw returned to the field on soil liable organic carbon(LOC),carbon pool management index(CPMI) and rice grain yield at the Junchuan in Hubei Province of China.Treatments were established following a split-plot design of a randomized complete block with tillage practices [plough tillage (PT) and no-tillage (NT)] as the main plot and wheat straw returning level [6000 kg·hm-2(SR3),4000 kg·hm-2(SR2),2000 kg·hm-2(SR1) and 0 kg·hm-2(SR0)] as the sub-plot treatment.The results indicated that,compared with PT,NT significantly increased the content of soil water-soluble organic carbon (WSOC) by 23％～68％(P＜0.000 1),microbial biomass carbon(MBC) by 21％～40％,easily oxidizable carbon(EOC) by 10％～63％(P＜ 0.000 1),but didn't have remarkable effect on the particulate organic carbon(POC).The SR2 and SR1 significantly increased the WSOC contents by 37％～74％ compared to SR0(P＜0.000 3).EOC contents increased with increasing amounts of wheat straw retuming.NT significantly increased CPMI compared to PT.The effects of wheat straw returning on CPMI followed the order:SR3＞SR2＞SR1＞SR0.SR3,SR2 and SR1 increased rice grain yield by 7.7％～16％,17％～35％ and 23％～28％ respectively.Correlation analysis revealed that WSOC could be a more sensitive indicator responsing to the changes of soil management practices than other indices in short-term.关键词
秸秆还田/土壤活性有机碳/碳库管理指数Key words
wheat straw returned to the field/ soil organic carbon/ carbon pool management index分类
农业科技引用本文复制引用
王丹丹,周亮,黄胜奇,李成芳,曹凑贵..耕作方式与秸秆还田对表层土壤活性有机碳组分与产量的短期影响[J].农业环境科学学报,2013,32(4):735-740,6.基金项目
国家科技支撑计划:粮食丰产科技工程(2011BAD16B02) （2011BAD16B02）
国家自然科学基金(31100319) （31100319）
中央高校基本科研业务费专项资金(2010QC032) （2010QC032）
