摘要
采用3种秸秆覆盖量（0、0.6、1.2 kg/m2）,研究其对雨养条件下夏玉米田不同深度土壤体积含水量和玉米不同生育期耗水量、水分利用效率（WUE）的影响。结果表明,秸秆覆盖可显著提高玉米抽雄吐丝期0∽60 cm土层的土壤体积含水量,但灌浆成熟期,0∽60 cm土层,各覆盖处理的土壤体积含水量与对照差异不大,60∽120 cm土层,C1.2处理的土壤含水量最大,C0.6次之,对照最低。秸秆覆盖可减少玉米苗期耗水量,增加抽雄吐丝期耗水量,拔节和灌浆成熟期耗水量差异不明显,覆盖后玉米的总耗水量无差异。在耗水量相同情况下,覆盖处理提高了夏玉米的水分利用效率,表现增产。
Taking the compact type summer maize variety Chaoshi 1 as material, 3 straw mulching quan- tities（0,0.6,1.2 kg/m2） were set to study their effects on the soil moisture content in different depths and the water consumption content and water use efficiency （WUE） in growth period under the rain -fed condition. The results showed that the soil moisture content in the layer of 0 -60 cm could be improved significantly by straw mulching at tasseling - silking stage ; but it had little difference with control at filling - maturity stage. The soil moisture content in the layer of 60 - 120 cm was the maximum with the treatment of C1.2 , followed by Co. 6 treatment and the minimum in control. Straw mulching could reduce the water consumption at the seedling stages, but increase that at tasseling - silking stage. The water consumption had no obvious difference at joint- ing and mature stages. The total water consumption had no difference after covering. Under the same water consumption, straw mulching could increase the water use efficiency and yield.
出处
《山东农业科学》
2015年第6期39-41,44,共4页
Shandong Agricultural Sciences
基金
公益性行业(农业)科研专项(200903003)
山东省自然科学基金项目(ZR2010CQ009)
关键词
夏玉米
秸秆覆盖
生育期
耗水特性
水分利用效率
Summer maize
Straw mulching
Growth period
Water consumption characteristics
Water use efficiency
