摘要
2007-2008年在宁夏南部半干旱地区旱作春玉米播前设置了4种不同秸秆覆盖量（0、0.45、0.9、1.35万kg/hm^2）处理,分析了该区秸秆覆盖量对土壤水分保蓄及水分利用效率的影响。两年定点试验表明,不同秸秆覆盖量对土壤含水量影响存在季节性、层次性差异;0.9 kg/hm^2覆盖量处理,在玉米大喇叭口期以前,对保持0-40 cm土层的土壤含水量有显著效果（P＆lt;0.05）,较对照土壤水分含量提高了14.2%;秸秆覆盖量达到1.35万kg/hm^2时,土壤含水量不再显著增加。0.9-1.35万kg/hm^2覆盖量处理较对照增产显著（P＆lt;0.01）,幅度达16.9%;玉米水分利用效率较对照增加了4.3-5.6 kg/（mm.hm^2）,达到了极显著水平（P＆lt;0.01）。
The study on the effects of different straw mulching quantity （0, 4 500, 9000 and 13 500 kg/hm^2） on soil water and water use efficiency of spring maize was conducted in semiarid area of Ningxia from 2007 to 2008. The resuits showed that the effects of straw mulching treatments on soil water varied in different crop growth stages and soil layers. Straw mulching treatment of 9 000 kg/hm^2 had significant effect on soil water content of 0 - 40 cm soil layer compared with CK （P 〈 0.05）, and the soil water content increased by 14.2%. The treatment of 13 500 kg/hm^2 raised soil water content insignificantly compared with treatment of 9 000 kg/hm^2. 9 000- 13 500 kg/hm2 treatments could increase the yield by 16.9 % （ P 〈 0.01 ）, water use efficiency of spring maize increased by 4.3 -5.6 kg/（mm· hm^2） compared with CK （P 〈0.01）.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第4期196-202,共7页
Agricultural Research in the Arid Areas
基金
十一五国家支撑计划项目“农田集雨保水关键技术研究”(2006BAD29B03)
“节水共性技术研究”项目(2007BAD88B10)
关键词
春玉米
秸秆覆盖量
土壤含水量
水分利用效率
spring maize
straw mulching quantity
soil water content
water use efficiency
