论文部分内容阅读
土温是指农田地面以下土壤中的温度。主要指与农作物生长发育直接有关的表土温度。气象部门对于耕作层(0～20厘米)土壤温度,每日定期进行观测记录,主要是分地表0厘米、5厘米、10厘米、15厘米、20厘米五分层次。另外,还测量40、80、160、320厘米深度各层次土壤温度变化情况。由于深层土壤温度变化小,对农作物影响不大,所以不做为农业气象观测主要项目。
Soil temperature refers to the temperature in the soil below the farmland surface. Mainly refers to the crop growth and development directly related to the surface temperature. Meteorological departments for the tillage layer (0 to 20 cm) soil temperature, daily observations recorded regularly, mainly sub-surface 0 cm, 5 cm, 10 cm, 15 cm, 20 cm five layers. In addition, soil temperature changes at various levels of 40, 80, 160 and 320 cm were also measured. As the deep soil temperature changes small, little effect on crops, it is not as a major project of agricultural meteorological observation.