摘要
在晋中山西农科院试验场采用寸段秸杆耕层掩埋,研究秸秆在土壤中的残留,分配及损失。结果证明,进入土壤的秸杆,一年内有22—38%可以用机械的办法分筛出来。年消化率为62—78%,进入土壤有机质部分的秸杆碳为13.2—22.1%,损失碳在50.3—60.1%之间。按土重3%施玉米秸和小麦秸,一年后,土壤增值复合度分别为86.4和90.1%。田间每年按250kg/亩施用玉米秸。连续三年 HA/HF 值降低0.06。
The experiments were carried out in the basin soil in the middle part of Shanxi prov-ince,for the study of an amount of straw remaining,straw distribution,and straw loss insoils by burying the inch-straw segments into cultivated soil layer.Results indicated that22%-38% of straw in soil were sieved mechanically during the year.The yearly digestiveratio was 62%-78%.Straw carbon obsorbed into organic matter in soil was 13.2%-22.1%,and carbon loss was 50.3%-60.1%.The degree of additional complexing of soil appliedwith corn and wheat straws(3% of soil weight)was 86.4% and 90.1% respectively in theyear.After 3 years,HA/HF value decreased by 0.06 with the application of 250kg of cornstraw per mu per year.
出处
《干旱地区农业研究》
CSCD
北大核心
1991年第1期46-51,共6页
Agricultural Research in the Arid Areas
关键词
秸杆
消化率
增值复合度
耕地
土壤
crop straws
digestive ratio
burying straws in tilth layer
degree of additional complexity
