持水率 meaning in Chinese

specific retention

In view of the problem of three - phase flow interpretation , a method for applying grey theory and optimization technique to processing three - phase producing profile is presented
该方法以滑脱模型为基础，建立极小化目标函数及视流体速度（流量）、密度、持水率、温度和压力等测量参数的理论响应方程。
Measuring unsaturated hydraulic characteristic parameters , such as capillary soil water , saturated soil moisture , field moisture , saturated conductivity etc . , is not only expensive but also accuracy uncontrolled
测量非饱和带水力特性参数：毛管上升水、饱和含水率、田间持水率、给水度、饱和渗透系数等，即费时、费力又难以保证试验精度。
Throug the study on irrigation quota and irrigation times for licorice root planted in arid sandy land of middle ningxia , the result shows : by increasing irrigation frequency and irrigation fixed quantity properly , it can play a positive role in the conserving and increasing water - holding capacity in arid - belt sandy area
摘要通过对宁夏中部干旱带沙地种植甘草的不同灌水定额及次数的研究，结果表明，适当的增加灌水次数和灌水定额对于保持和增加干旱带沙壤土持水率具有积极的作用，有利于植物的生长发育。