不同灌水技术下香梨地土面蒸发规律研究

Evaporation Processes on Fragrant Pear Land Surface with Different Irrigation Techniques

对新疆库尔勒灌溉实验站香梨地不同灌水技术处理的土面蒸发进行了试验研究,并分析了土面蒸发强度与土壤含水量和土面蒸发强度与土壤耗水强度间的关系。结果表明,各处理在整个生育期的平均土面蒸发强度由大到小依次为微喷、小管和环管,其累积土面蒸发值分别为116.05,104.53和89.60mm。各处理棵间相对土面蒸发强度与0—20cm土层深度的土壤含水量相关关系显著,呈二次递增规律。土壤耗水强度在生育期内整体上呈现从大到小的变化规律,大小顺序依次为微喷、环管和小管,且土面蒸发强度均随着土壤耗水强度的增大而增大,二者之间呈幂函数关系。

Soil surface evaporation in fragrant pear land of the Kuerle Irrigation Experiment Station was stud ied experimentally with different irrigation techniques. The relationships among soil surface evaporation in tensity, soil water content and soil water consuming intensity were analyzed. Results showed that the treat ments, in terms of the average soil surface evaporation intensity over the whole growth period, were in the descending order of microjet, small tube and ring tube. Their cumulative soil surface evaporation values were 116.05, 104.53 and 89.60 mm, respectively. For the treatments of different tree intervals, the relative in tensity of soil surface evaporation in 020 cm soil layer had a significant correlation with soil water content, presenting a quadratic increasing relation. In the whole growth period, soil water consumption intensity pres ented a high to low change, with the descending order of microjet, ring tube and small tube. Soil surface evaporation intensity increased with increased soil water consumption intensity, which can be described by power function.