高盼 1徐莹莹 1杨慧莹 1刘玉涛 1王宇先 1王俊河1
作者信息
- 1. 黑龙江省农业科学院 齐齐哈尔分院/国家玉米体系齐齐哈尔综合试验站,黑龙江 齐齐哈尔 161006
- 折叠
摘要
Abstract
In order to improve the straw resource utilization and soil fertility in the northeast intensive production area of maize,through the regional contrast test,sut up four treatments including regular cultivation(CK),straw mulching returning,straw crushing rotary tillage returning,straw digging returning,the effect of maize straw returning methods on soil physical properties and yield of maize were explored in the semi-arid areas.The results showed that soil bulk density of CK was the largest at 1.38 g·cm.-3,and secondly to straw mulching returning,compared with the control it was reduced by 3%,and soil bulk density of straw digging returning and rotary tillage returning was lower,compared with the control it was reduced by 8.06% and 7.46%,respectively.In the soil layer 0~20 cm silking stage,the water conten of straw digging returning was higher than CK,straw mulching returning and straw crushing rotary tillage returning for 12.20%,7.35% and 16.30%,respectively;in mature,the water conten of straw digging returning was higher than CK,straw mulching returning and straw crushing rotary tillage returning for 12.20%,7.35% and 16.30%,respectivelyfor 18.52%,17.60% and 22.63%.In soil layer 20~40 cm silking stage,the water conten of straw digging returning was higher than CK,straw mulching returning and straw crushing rotary tillage returning for 14.90%,13.73% and 15.82%.In mature,the water conten of straw digging returning was higher than CK,straw mulching returning and straw crushing rotary tillage returning for 14.98%,14.66% and 17.82%.Grains per row of straw digging returning was the largest,the other returning treatment was only slightly lower.The yield of different treatments had certain differences,average annual yield of straw digging returning was the highest,increased by 9.6% than CK.关键词
秸秆还田/土壤容重/土壤含水量/产量Key words
maize straw-returning/buck density/soil water content/yield分类
农业科技
