摘要
以贫瘠型黑土区土壤为供试对象,对2种保护性耕作措施(模式1为秋季深松、平播+秸秆还田;模式2为秋季深松起垄+根茬还田)下土壤的理化特性进行研究。结果表明:2种保护性措施可以增加土壤有机质含量,提高土壤pH,其中秸秆还田措施效果最明显;对土壤不同速效养分含量影响不同;对土壤物理性质的影响主要表现为降低土壤容重和增加土壤田间持水量。不同的保护性耕作措施对于提高土壤肥力、改善土壤物理特性起到重要作用。
Soil physic-chemical properties were studied in arid area under two conservation cultivations （one was deep plough, flat sowing and straw mulching,the other was deep plough and ridge forming, rootstalks and field）. It was found that two conservation cultivations could increase the content of soil organic matter, raise the pH,and the straw-mulching had the grea test effects,it was also had different results due to different available nutrition. Besides,the conservation cultivations could reduce soil bulk density, increase field moisture capacity. Different conservation cultivations took important role in increasing soil fertility and improving soil physical properties.
出处
《黑龙江农业科学》
2009年第6期55-57,65,共4页
Heilongjiang Agricultural Sciences
基金
黑龙江省重点科技攻关项目(GB06B107-3)
关键词
保护性耕作
有机质
秸秆还田
土壤容重
conservation cultivations
organic matter
straw-mulching
soil bulk density
