论文部分内容阅读
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。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；决策模型则根据不同生育阶段的作物水分指标、产量反应系数、和以取得最大经济效益为目的的目标函数，进行优化灌溉决策──灌或不灌、灌溉期和灌溉量。
In the soil-plant-atmosphere system, the effective soil moisture storage, crop water consumption and effective precipitation are the main components of farmland water balance. The soil moisture prediction model comprehensively analyzed their dynamic changes, and gave the actual farmland evapotranspiration and soil effective moisture content in the future. The decision-making model was based on crop moisture index, yield response coefficient at different stages of growth, and in order to obtain the maximum economic benefit The objective function is to optimize irrigation decisions - irrigated or not, irrigated and irrigated.