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文中用相关分析的方法,研究了温度和大气降水对玉米产量的影响,并建立了玉米产量丰歉预报数学模型。 分析表明:温度和大气降水对玉米产量的关系极为密切,但各发育时期的反应程度不同。玉米产量的高低,与前一年10月份降水,以及营养生长和生殖生长期的水、热条件的变化相关显著,并成线性关系。 当温度和大气降水的阶段性分配,与玉米该期的生理需要相一致时,才能获得高产。 本文建议用玉米重要发育时期的阶段性积温,代替≥10℃活动积温,作为衡量玉米丰歉的温度指标。
The correlation analysis method was used to study the effect of temperature and precipitation on the yield of maize. A mathematical model of apricot yield forecast was established. The analysis shows that the relationship between temperature and precipitation on the yield of maize is very close, but the degree of reaction in different developmental stages is different. The level of maize yield is significantly and linearly related to the precipitation in October of the previous year and the changes of water and heat conditions in vegetative and reproductive growth periods. When temperatures and the phased distribution of precipitation are consistent with the physiological needs of the corn during this period, high yields can be achieved. In this paper, it is suggested to use the accumulative temperature of stage during the important development period of maize instead of the active accumulated temperature of ≥10 ℃, which is used as the temperature indicator to measure the apology of corn.