摘要
以田间试验资料为基础，建立了一个农田水量平衡模型，探讨了它对作物根系吸水函数和蒸散公式的敏感性。结果表明．不同的根系吸水函数和蒸散公式对农田水量平衡模型的响应程度差异较大，根据与田间土壤水分实测结果比较，认为用Ｓｅｌｉｍ根系吸水函数和Ｐｅｎｍａｎ－Ｍｏｎｔｅｉｔｈ蒸散公式的组合模式能较好地模拟土壤水分变化过程。
Based on the field observing data, a field water budget model was developed in this paper,and its sensibility to the water extraction function by roots and evapotranspiration form were studied. The results showed that the responsiveness was quite differ, while the various extraction functions and evapotranspiration forms were applied.Model predictions were in good agreement with the measUred water content in the soil profile,if the Selim-extraction function and Penman-Monteith form were used.
出处
《水土保持研究》
CSCD
1996年第3期1-7,共7页
Research of Soil and Water Conservation
基金
国家自然科学基金
关键词
农田水量平衡
根系吸水函数
蒸散
敏感性
field water budget
water extraction function by roots
evapotranspiration
sensibility
