【摘要】 采用水量平衡法实测和模型模拟对两种作物的需水状况进行了对比研究,并对预测作物需水量的模型在本地区的有效性进行检验;目前,沈阳地区作物需水量的研究尚少,本研究对沈阳地区作物需水情况的进一步研究提供基础资料。结果表明,作物需水量的预测和实测值非常接近,相对误差和绝对误差很小,另外,对多气象因素和土壤蒸发的关系进行了拟合。得到拟用模型对沈阳地区大豆和玉米作物的需水量预测精度很高,在缺失土壤蒸发资料时,可用气象数据对其预测。更多还原

【Abstract】 Maize and soybean are primary crops in the northeast region of China.To understand crop water requirement of these crops,crop water requirement of maize and soybean in Shenyang of the northeast region is studied with water balance method and simulation model,and the validity of the model for prediction of crop water requirement in this region is tested.Currently,the research on the crop requirement is not enough.Therefore,the study can provide basic data for the research in the future.The results show the simulated and measured values of crop water requirement are very close,and the relative error and absolute error are quite small.The precision of crop water requirement model of Shenyang region is high.If soil evaporation is not observed,crop water requirement can be predicted with meteorology data.更多还原