长期不同施肥方式对黄土高原旱地黑垆土土壤酶活性及其肥力的影响

以30 a(1979～2008)肥料长期定位试验为基础,分析探讨长期不同施肥方式对旱地黑垆土耕层(0～20 cm)土壤酶活性及其肥力的影响.结果表明:土壤脲酶活性M处理显著高于其他处理,MNP和SNP处理效果优于NP处理;土壤多酚氧化酶活性N和NP处理增加效果显著,M、MNP、SNP处理效果均不明显;土壤蛋白酶活性N处理效果最佳,显著高于其他处理;MNP、SNP处理能显著增加土壤有机质和全磷含量,有利于全氮含量的积累,表明有机-无机肥配施是旱地中低产田培肥土壤的有效措施.

Effect of Long-term Different Fertilization Ways on Soil Enzyme Activities and Fertility in Dryland Black Humus Soil in the Loess Plateau

By a 30-year (1979～2008) long-term located fertilizer experiment, effect of long-term different fertilization ways on soil enzyme activities and fertility in dryland black humus soil was analyzed. The results showed that, effect of M treatment generate on soil urease activity is obviously higher than other treatments, and the effect of MNP and SNP treatments generate surpass that of NP treatment; The effect of N and NP treatments generate increasing on soil polyphenoloxidase activity is remarkable, and effect of M, MNP and SNP treatments generate is not to be obvious. The effect of N treatment way on soil protein enzyme activity is very best, which obviously is higher than others; MNP and SNP treatments can obviously increase soil organic and total phosphorus contents, which is advantage to accumulate total nitrogen content, which indicated that organic-inorganic matches executes is a effective measure of the cultivating soil fertility in dryland of middle-low yielding.