摘要
针对当前旱田耕地土壤有机质含量下降，影响土壤生产力的实际，探讨秸秆还田后不同年限对土壤腐殖质组分的影响。研究结果表明，不同剂量秸秆还田后第二年和第三年土壤有机碳（SOC）含量0。20cm（表层）差异不显著，20～40cm（亚表层）第三年显著高于第二年；土壤腐殖质各组分有机碳的含量均是0．20cm大于20～40cm，但随着秸秆施用量的增加，差异减小；秸秆还田第三年和第二年相比，FA含量降低，HA、Hu含量以及PQ值都有所增加，表明秸秆还田三年土壤有机碳含量增加，土壤腐殖化程度增加。研究结果对提高土壤有机质含量，提升地力具有指导意义。
The decrease of the soil organic matter content has the influence on the soil productivity. This article is studied the composition of straw application on soil humus with different fixed number of years of deep straw return. The results shows that both the second year and third year of straw return, the content of organic （SOC） is basically the same in the surface, but the content of SOC in subsurface, the third years is higher than the second year. The organic carbon content of the various components of soil humus are 0 - 20 cm greater than 20 - 40 cm,but with the increasing of straw return rate, this gap is becoming decreasing and at last the content is 20 - 40 em greater than 0 - 20 era. Compared with the third year and second year, the content of FA decreased, while the content of HA, Hu and PQ increase. It means that after three years straw return, the content of most organic carbon increase and the soil humifieation increases. The research has the guiding significance for improving soil organic matter content and soil fertility.
出处
《土壤通报》
CAS
CSCD
北大核心
2013年第6期1398-1402,共5页
Chinese Journal of Soil Science
基金
国家科技支撑计划子课题(2012BAD05B01,2011BAD09B02)
农业部公益性行业专项目(200903007,201303125)
国家973项目子课题(2011CB100502,2011CB100503)
辽宁省科技农业攻关重大项目(2011213001)资助
关键词
秸秆还田
年限
有机碳含量
腐殖质组分
Straw return
Fixed number of years
Organic carbon content
Humus composition
