土壤有效水分

以此为基础，分别分析了产量对太阳辐射、降雨、土壤层厚度、土壤有效水分以及径流曲线数变化的敏感性。

We then analyzed the sensitivity of grain yield to solar radiation , rainfall , soil depth , soil plant available water , and runoff curve number , comparing simulated yields to those with the original , standard data sets .

土壤有效水分与化肥相互作用机理及其应用研究&Ⅰ.化肥的盐（度）指数

Study on interactive mechanism between soil available water and fertilizers and its application ⅰ . the salt index of fertilizers

结果表明：1春小麦蒸散量在降水或灌溉后1～2d最大，然后逐渐下降，说明春小麦的蒸散速度受土壤有效水分含量的影响；

The results are as follows : ① The evapotranspiration of spring wheat will reach the largest 1 ~ 2 days after rainfall or irrigation , then decreases gradually . That means the speed of evapotranspiration in spring wheat is affected by the soil water content .

无论在灌溉还是非灌溉条件下，0～100cm和0～200cm土壤有效水分含量与同期根层土壤有效水分含量密切相关。

The effective moisture in soils of 0 ~ 100cm and 0 ~ 200cm was closely related to that in the soil nearby roots whether irrigation was possible or not .

并由此可推算出0～100cm和0～200cm农田土壤有效水分含量的关系式，同时探讨用大气候观测场土壤水分资料代替农田土壤水分状况的可能性，并求出推算模型。

Calculated equations for effective moisture in the soils of 0 ~ 100cm and 0 ~ 200cm were set up . Possibility of using the data from climatic observation platform instead of the effective moisture in farmland soil is discussed .

通径分析表明：影响土壤有效水分的土壤-立地子因子主要是局域位置、地形条件和地下水位；

By path analysis , the position ( outside or inside dams ) , groundwater level and drainage are the important factors for available moisture ;

结果表明，在年生长期中，刺槐林地水分条件严酷、土壤有效水分少。

The results show that the soil water conduction of the plantation was very poor and the available water content was very low during the growing season .

南方红壤施用0.2%的保水剂可以显著改善土壤有效水分的保持与供应，促进1~0.5mm的土壤团粒结构形成。

Applying 0.2 % water - retaining agents into red soil could significantly increase the water retaining and supplying ability of soil , and increase soil aggregates of grain diameter of 1 ~ 0.5 mm .

结果表明：地膜覆盖具有显著的增温效应，可使春小麦生育期提前，产量提高，并可提高土壤有效水分的利用率。

The result show that the plastic film have salient warming effect , it can let spring wheat growing period advance and yield increase , and it can advance the use ratio of soil effective water .

根据田间试验资料，讨论了不同地膜覆盖方式对麦田土壤温度、土壤有效水分含量以及小麦生长发育产量形成的综合影响。

It is discussed that the integrate effect of the different cover modes of plastic film on the soil temerature , soil effective water and wheat growth and yield with field experiment data .

在土壤－植物－大气系统中，土壤有效水分贮存量、作物耗水量和有效降水量是农田水分平衡的主要组成因子。

In soil-plant-atmosphere system , soil available water content , crop water consumption , and effective precipitation are the main factors in water balance equation of farmland .

随着土壤的通气性和渗透、排水率的改善，土壤有效水分增加。

With improvement of aeration , infiltration and drainage percent , the availability of moisture soil increases corresponsively .

土壤水分预报模型综合分析了它们的动态变化，给出了未来农田实际蒸散量和土壤有效水分含量；

The sub-model of predicting soil water content analyses comprehensively their dynamic changes and tells in advance the actual evapotranspiration of farmland and soil available water content in the future .