2009•Ganhan diqu nongye yanjiuRequires access
Effects of different straw mulching quantity on soil evaporation and soil temperature in summer maize field.
Junpeng Zhang, Sun Jingsheng, Zugui Liu, Xiaodong Li, Xiaofei Liu
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Abstract
Micro-lysimeters and bent stem earth thermometers were used to measure soil evaporation and soil temperature under different straw mulching quantity in summer corn field.Five treatments were established including 0(CK),1 500,4 500,7 500 and 10 500 kg/hm2 of straw mulching quantity respectively.The effects of different straw mulching quantity on soil evaporation and soil temperature in summer corn field were analyzed.The results indicated that straw mulching can restrain soil evaporation effectively and hold down the daily change range of soil temperature.In the growing period of summer corn,the soil evaporation of the four straw mulching treatments(from high straw mulching quantity to low straw mulching quantity) decreased by 63.51%,60.98%,52.94% and 34.07% respectively,and the average daily change range of soil temperature in 0～20 cm depth decreased by 3.14℃,2.93℃,2.32℃ and 2.02℃ respectively compared with CK.Straw mulching treatments could improve the yield as well as water use efficiency of summer corn due to the low soil evaporation and soil temperature change range.