绿洲灌区小麦间作玉米的棵间蒸发及其主要影响因子

Evaporation of Wheat/Corn Intercropping and Its Main Impact Factors in Oasis Irrigation Areas

通过研究绿洲灌区小麦间作玉米的棵间蒸发,确定其主要影响因子。结果表明,土壤含水量、土壤温度、叶面积指数及小麦留茬覆盖等均为影响棵间蒸发的主要因子,间作比单作棵间蒸发量高出3.3%～4.1%,留茬可降低棵间蒸发3.7%,也可提高土壤温度2.1～2.5℃。在不同供水水平的单作玉米各处理中,表层土壤含水量随供水量的增大而增大,棵间蒸发总量也随供水量的增大而增大。同一供水水平下,高茬收割小麦间作玉米群体的棵间蒸发量和蒸发总量低于小麦间作玉米群体。

The evaporation of wheat/corn intercropping in oasis irrigation area was studied,and the main influencing factors were determined.The results showed that soil moisture,soil temperature,leaf area index and wheat stubble mulching are the main factor influencing evaporation.The evaporation of intercropping was 3.3%~4.1%higher than that of the single cropping,the stubble could reduce the evaporation of intercropping by 3.7%and increase the soil temperature by 2.1~2.5℃.In different water supply levels of corn monoculture,the topsoil moisture and evaporation increased with water supply capacity.Under the same water supply level,the evaporation of wheat/corn intercropping with high stubble harvesting of wheat was lower than regular wheat/corn intercropping.