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以日光温室秋冬茬甜椒为试材,进行膜下滴灌试验,观测4种不同水分处理对甜椒全生育期内的根区土壤温度变化规律,采用通径分析方法分析土壤温度与环境因子的关系及其综合效应。结果表明:土壤浅层温度增加较快且变幅较大,随着土壤深度的增加,土壤温度增加缓慢,变幅迅速变小。各层土壤温度最大值出现时间随深度增加而延迟。土壤温度变幅与土层深度呈指数关系,且各处理15:30时二者相关系数最大。土壤25cm深度范围内平均温度随灌水定额的增大而减小。灌水定额对土壤温度变幅与土层深度之间的相关性具有一定影响。土壤含水率、温室温度与土壤温度相关系数分别为-0.7574和0.6512,直接通径系数分别为-0.7021和0.6172,说明土壤含水率和温室温度对土壤温度的提高影响极大。
The autumn and winter stubble sweet pepper in solar greenhouse was used as the test material to test the drip irrigation under the film. The changes of root zone soil temperature during the whole growth period of sweet pepper were observed under four different water treatments. The path analysis was used to analyze the effects of soil temperature and environmental factors Relationship and its combined effects. The results showed that the shallow soil temperature increased rapidly and with a large amplitude. With the increase of soil depth, the temperature of soil increased slowly and its amplitude decreased rapidly. The maximum time of soil temperature in each layer appears to be delayed with increasing depth. The change of soil temperature is exponential with soil depth, and the correlation coefficient is the highest at 15:30. The average temperature within the depth of 25 cm decreased with the increase of irrigation quota. Irrigation quotas have a certain influence on the correlation between soil temperature change and soil depth. The correlation coefficients of soil water content, greenhouse temperature and soil temperature were -0.7574 and 0.6512, respectively. The direct path coefficients were -0.7021 and 0.6172, respectively, indicating that soil moisture content and greenhouse temperature had a great influence on soil temperature increase.