Experimental study was performed to determine the moderate water deficit effect and physiological irrigation index of tobacco with lysimeters by controlling the lower limit of soil water content.
为确定烟草的适度亏水效应及烟草水分生理灌溉指标，进行了烟草蒸渗仪试验，通过控制土壤水分下限研究烟草的适度亏水效应。
At first, through analyse the influence on the soil, crops, groundwater and function of water body of sewage, the index system of sewage irrigation security appraisal have been set up.
首先，通过污水对土壤、农作物、地下水以及水体功能的影响分析，建立了污水灌溉安全性评价的指标体系。
Border irrigation current advancement process model plays an important role to determine irrigation technical index, average field infiltration rate and roughness coefficient.
畦灌水流推进过程计算模型对确定灌水技术要素、田间平均入渗率和糙率有十分重要的作用。
This paper reviewed the key diagnostic index and optimized regulating route of high yield population quality about mulch drip irrigation cotton.
论述了膜下滴灌棉花高产群体质量诊断的主要指标及群体优化调控途径。
Farm irrigation and drainage mechanical power and grain purchasing price index have negative correlation to grain production.
农业排灌机械动力和粮食收购价格指数与粮食生产呈负相关。
The food yield per unit water is an important index, which indicate the efficiency of the irrigation water use and status of food production.
单位水量粮食生产能力是综合反映灌溉用水水平和粮食生产状况的重要指标。
Then using the method of AHP to calculate and analyze the data, the corresponding index of the non-point pollution degree in irrigation district can be get to evaluate the rank oft…
通过AHP方法，对所得到的数据进行计算分析，最后可得出灌区面源污染程度的相应指数，从而定出灌区面源污染的等级，这为灌区建设计划的制定和实施提供很好的依据。
At the same time, the multiple cropping index, irrigation area, grain yield and the rate of irrigation had been improved increasingly.
耕地灌溉率、复种指数、耕地灌溉面积、粮食产量不断提高；
This paper first sets up the concept of the effective irrigation quality index system of field water application.
本文根据传统田间灌水质量指标体系存在的不足首次提出了有效田间灌水质量指标体系的概念。
The water body function security of sewage irrigation is displayed in the factors of routine physics and chemistry index , poison three respects of the index and microorganism's factor.
影响水体功能安全的因素主要分为常规理化指标、毒害指标和微生物因子因素组。
In conclusion, there were some differences in the results of soil surface evaporation, when the leaf area index was large. A further study was needed under high-frequency irrigation.
分析认为，当叶面积指数较大时，棵间蒸发的现有研究结果尚存在较大的差别，而且高频灌溉条件下的土面蒸发有待于进一步研究。
A field study was conducted to determine the relationships between Crop Water Stress Index (CWSI), yield, and quality of cotton under drip irrigation with mulch.
通过田间试验，研究了膜下滴灌棉花的作物产量、品质和作物缺水指标(CWSI)定量关系。
Through the calculation of the water stress index and N stress index, when and how much irrigation and fertilization can been decided.
通过对作物水分胁迫系数和氮素胁迫系数的模拟计算，可以求出最佳的灌水、施肥时间和各个时间段分别的灌水、施肥用量。
The change tendency of leaf area index of flue-cured tobacco assumed to "S" under different water amount by bunching irrigation.
不同水分处理下烤烟叶面积指数均呈“S”型变化趋势。
The optimum soil moisture content index about tomato seedling bed irrigation was conducted out in early spring.
对番茄早春育苗的苗床灌溉最佳土壤含水量上限数值进行了试验研究。
The optimum soil moisture content index about tomato seedling bed irrigation was conducted out in early spring.
对番茄早春育苗的苗床灌溉最佳土壤含水量上限数值进行了试验研究。
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