【摘要】 描述了运用修改彭曼法估算作物需水和耗水参数的一般过程以及青海东部地区旱农田作物耗水参数的估算结果 ,并对该地区作物耗水的一般特征作了简要分析。结果表明 :青海东部旱区作物潜在需水量为 6 5 0 2 8mm ,但实际耗水严重不足 ,全生育期耗水仅 16 8 2 2mm ,不及潜在需水量的 30 %。更多还原

【Abstract】 Water consumption and requirement water of crops were estimated by readjusted Pengman method.Water consumption index of crops were estimated in east of Qinghai dry farmland Traits of crop water consumption were analysed.The results shown,potential requirement water of crops is 650 28mm in east of Qinghai dry farming region.But water comsumption of crops is seriously unenough in fact.It is only 168.22mm in their full time of growing.It is only 30% of potential requirement water of them.更多还原