玉米秸秆不同还田方式对土壤肥力及小麦生长的影响

Effects of different corn stalk returning methods on soil fertility and wheat growth

为了提高农作物秸秆利用率,改良盐碱土壤的肥力状况,研究秸秆直接还田和秸秆堆肥还田以及不同投加量对盐碱土土壤肥力的改良效果和小麦植株的生长状况的影响.结果表明：秸秆堆肥还田,盐碱土壤的p H降低了0.30～0.85个单位,秸秆直接还田,盐碱土壤的p H降低了0.05～0.49个单位,秸秆堆肥还田土壤有机质和速效养分含量比秸秆直接还田改良效果显著,且秸秆堆肥以1：12（质量比）覆土,更利于小麦生长和盐碱土的改良.

In order to improve the utilization of crop straw and fertility of saline alkali soil,study the effects on fertility of soil and growth of wheat plants with straw application straw compost returning and different dosage.The results show that：Straw compost returning,the p H of saline soil decreased from 0.30 to 0.85,Straw returning,the pH of saline soil decreased from0.05 to 0.49,Compared with straw returning,straw compost returning the soil organic and available nutrient content increased dramatically,besides straw compost（mass ratio）with 1：12 in soil,more beneficial to the improvement of saline alkali soil and wheat growth.