温室甜椒局部分根区交替畦灌土壤温度的变化研究

Experimental study on soil temperature of partial root-divided alternative border irrigation applied in greenhouse capsicum

温室甜椒局部分根区交替畦灌根际土壤温度变化研究表明,浅层土壤温度增加较快且变幅很大,不同深度土壤温度出现最高温度的时间随深度增加而延迟;局部分根区交替畦灌的平均地温(湿润侧和干燥侧)比常规灌溉的高,8∶00时到14∶00时浅层土壤湿润侧地温比相应的干燥侧低,14∶00时到18∶00时各个深度湿润侧地温都比相应的干燥侧高;每天同一时刻浅层土壤温度与气温呈线性相关,一天中浅层土壤温度和气温呈指数关系;土壤温度变幅和深度可以拟合成指数关系且土壤温度与土壤含水量有密切联系。

Experiment was conducted to study soil temperature of partial root-divided alternative border irrigation applied in greenhouse capsicum, and the results indicated that the shallow layer soil temperature increases quickly and changes greatly, the peak temperature time of soil temperature in different depth postpones with the depth increasing; the average temperature of partial root-divided alternative border irrigation （wet side and dry side）is higher than that of general irrigation, the shallow layer soil temperature in wet side is lower than that in dry side from 8 to 14 o＇clock, the soil temperature in wet side is higher than that in dry side in each depth from 14 to 18 o＇clock; everyday the shallow layer soil temperature and air temperature become the line related at the same time, during one day the shallow layer soil temperature and measuring depths become an exponential function ; the temperature-varying ranges and measuring depths could be fitted into an exponential function, and soil temperature has close relation with soil moisture.