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对坝上的旱区自然降水条件下主要作物的生产潜力,经田区试验,并应用试验资料,对“FAO”中瓦赫宁根法,进行参数订正,建立了适合当地的生产潜力概算公式,结合田区试验经济学产量最高值,确定了坝上旱区降水生产潜力值,以当地高产调查值进行检验。应用“潜势积”为指标进行了生产潜力结构分区,计算了坝上旱区主要作物不同处理的耗水系数及降水利用率,分析了提高降水利用率的限制因子及提高坝上旱区生产潜力的开发途径。
According to the production potential of main crops under the condition of natural rainfall in arid area on the dam and the field test, and applying the test data, the parameters of the Wachningen method in “FAO” were revised and the formula for estimating the potential of local production was established , Combined with the highest output of field experiment economics, determined the potential value of rainfall production in arid areas of the dam, with the local high-yield survey value for testing. The “Potential Potential” is used as index to carry out the production potential structure zoning. The water consumption coefficient and precipitation utilization rate of different treatments of main crop in arid area are calculated, and the limiting factors of increasing precipitation utilization rate are analyzed and the production of arid area is improved Potential development path.