Effects of different straw mulching quantity on soil water and WUE in semiarid region
The study on the effects of different straw mulchi ng quantity (0, 4 500, 9000 and 13 500 kg/hm2) on soil water and water use eff iciency of spring maize was conducted in semiarid area of Ningxia from 2007 to 2 008. The results showed that the effects of straw mulching treatments on soil wa ter varied in different crop growth stages and soil layers. Straw mulching treat ment of 9 000 kg/hm2 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 b y 14.2%. The treatment of 13 500 kg/hm2 raised soil water content insignifi cantly compared with treatment of 9 000 kg/hm2. 9 000～13 500 kg/hm2 treatme nts could increase the yield by 16.9% (P<0.01), water use efficiency of sp ring maize increased by 4.3～5.6 kg/(mm*hm2) compared with CK (P<0.01).
spring maizestraw mulching quantitysoil water con tentwater use efficiency
国家科技期刊平台
NSTL
万方数据
维普
