B 棵间蒸发 (evaporation)? C深层渗漏2、作物需水量?A,旱田作物需水量,植株蒸腾和棵间蒸发合称腾发量(evapotranspiration),也称为作物需水量 (Water requirement of crops )?影响需水量的因素?
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Surface evapotranspiration has obvious spatial variability, but traditional measurement methods are based on point measurements.
陆地表面的腾发量分布具有很大的空间变异性,而传统方法只能进行点上的计算。
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作物腾发量受土壤水分亏缺的制约，在不同的生长阶段，影响的大小亦不同。
The quantity of evapotranspiration of crops is limited by soil moisture deficits, in different growth period, the influences is different.
最后根据土壤湿度、作物腾发量以及作物的生长阶段采模糊决策作物的灌水量。
Finally, the irrigation water is decided by using fuzzy decision theory considering the effects of soil moisture, crop evapotranspiration and growing stage.
陆地表面的腾发量分布具有很大的空间变异性，而传统方法只能进行点上的计算。
Surface evapotranspiration has obvious spatial variability, but traditional measurement methods are based on point measurements.
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