irrigation requirement 灌溉需水量 ; 灌溉需要量 ; 浇灌需要量 ; 灌量 fertilizer requirement 需肥量 ; 肥需求 ; 需肥 ; 需肥特性 .
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文章详细信息 关键词： 早稻;;需水量;;灌溉需水量;;气候变化 [gap=1171]Keywords: early rice;crop water requirement;irrigation water requirement;climate change
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小麦灌溉需水量 Wheat irrigation water requirement
On the condition of total sown area being fixed, reducing the percentage of cereal crop and increasing cash and other crops both can significantly reduce agricultural water consumption and net irrigation water requirement per unit area.
在农作物总播种面积一定条件下,降低粮食作物比例、增大经济作物与其它农作物比例均能显著降低流域单位面积农业耗水量及单位面积农业净灌溉需水量。
参考来源 - 西北干旱内陆区石羊河流域农业耗水对变化环境响应的研究Regional planting structure of farm crops, which is the precondition of accurately predicting large-scale domain irrigation water demand is difficult to acquire. By generalizing and predigesting the irrigation schedule, a conceptual model was established.
针对大区域种植结构不易获取，进行灌溉需水量精确计算困难的问题，从作物灌溉制度设计入手，通过适当地概化与简化，建立了具有一定物理概念的大区域灌溉需水量预测模型，并分析了年总量和分时段预测模型的适用条件，以及建模资料长短对预测效果的影响。
参考来源 - 大区域灌溉需水量计算与预测研究·2,447,543篇论文数据，部分数据来源于NoteExpress
根据收集到的资料，计算得出全国主要作物的净灌溉需水量。
Based on the data collected in this study, net irrigation water requirement of main crop in china has been gotten.
许多人试图通过减少灌溉频率或改种需水量更少的作物来节约用水。
Many have been attempting to conserve water by irrigating less frequently or by switching to crops that require less water.
实际的需水量根据植物种类，气候(植物吸收的大部分水用于进行蒸发降温)，和灌溉效率的不同而有所不同。
The actual water requirements differ according to plant, climate (most of the water withdrawn by plants is for cooling through evaporation) and the efficiency of irrigation.
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