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从泡桐叶片蒸腾强度、单株蒸腾耗水量和人工林泡桐群体蒸腾耗水量三个方面研究了泡桐蒸腾耗水规律,分析了影响这三个规律的因子。研究证明,这些因子中只有土壤含量在目前是可以通过人工措施进行控制的,在粘壤土条件下,土壤含水量与泡桐叶片蒸腾强度相关方程为y(?)=-0.544+0.194x-0.007x~2,这个二次曲线的高峰期在土壤含水量为14%左右,当土壤含水量低于9%或超过18%时,蒸腾强度显著下降。
The law of water consumption and transpiration of Paulownia tomentosa were studied from three aspects: transpiration intensity of Paulownia plant, transpiration water per plant and transpiration water consumption of Paulownia plantation community, and the factors affecting the three laws were analyzed. Studies have shown that only the soil content of these factors can be controlled by artificial measures at present. Under the condition of clay loam soil, the equation of soil water content and the transpiration intensity of Paulownia leaves is y (?) = - 0.544 + 0.194x - 0.007x ~ 2, the peak of this quadratic curve is about 14% of the soil moisture content, and when the soil moisture content is less than 9% or more than 18%, the transpiration intensity is significantly decreased.