麦套玉米土壤温度动态变化的研究

麦套玉米共生期,小麦有遮荫和屏障作用。土壤的日平均温度、地面最高温度和日较差均为单作玉米>麦套畦埂玉米>麦套行玉米,地面最低温度则相反;此变化以晴天最为显著,多云天气次之,阴雨天最小。土壤温度日变化均随土层深度的增加而降低,表层变化大于下层,深层变化平缓。因此,土壤温度低是造成麦套玉米出苗晚、根系和植株生长慢的主要原因。

A Study on Dynamic Change of Soil Temperature in Wheat Interplanting of Corn

This paper mainly studies the dynamic change of soil temperature in wheat interplanting of corn. The experiment results showed that during the maize growing together with wheat, the daily mean of soil temperature, the ground highest temperature and daily range are the single-cropping maize > maize planting on wheat's ridges > maize planting on wheat's lines, while ground lowest temperature is on the contrary. This change is the most notable in sunny day, cloudy day in the second and overcast and rainy day at the minimum. The soil temperature variation decreases when the soil depth increases, the surface changes greater than below and the profound changes gently. Therefore the soil temperature is the main reason for the late seeding emergence and the slow growth of roots and plants.