长期不同施肥对土壤无机硫组分的影响

Effect of Long-term Fertilization on the Contents of Inorganic Sulphur in Soil

通过棕壤长期定位施肥试验研究了玉米-玉米-大豆轮作方式下不同施肥处理对土壤无机硫各组分含量的影响,结果表明,长期施用有机肥或有机肥与化肥配合施用,可以显著提高土壤水溶性硫的含量;单施有机肥土壤中吸附态硫含量呈现先升高后降低的趋势,但总体为上升趋势;有机肥与化肥配合施用土壤中吸附态硫的含量在1991年前增长速率较快,此后基本保持平衡,而对照处理土壤中吸附态硫含量基本保持不变;各处理中除不施肥处理呈现缓慢下降趋势外,其他土壤盐酸可溶性硫的含量均持续增加。

Effects of long-term fertilization on the contents of soil inorganic sulphur were investigated. The results showed that the content of soil H2O-S was significantly increased under long-term organic manure or applying both inorganic fertilizers and organic manure. The content of soil adsorbed-S was quickly increased in single applying inorganic treatment before 1991, however it was keeping steadiness in CK treatment. Except CK treatment, in those of other treatments the content of soil HCl-S persistent increasesd.