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上海地区1月份的平均气温为3.3℃,10月至次年5月的温度和降水型式均呈“V”字规律,适宜栽种油菜。但是,由于海洋性气候影响,天气变化复杂,冬季强冷空气南下,春季连续阴雨,都不同程度地影响着油菜的生长发育,导致减产。因此,分析油菜生育期间的有利和不利气候条件是十分必要的。鉴于对“丰”、“平”、“歉”年的气候条件影响尚无定量分析,故本文试图在这方面作一探索,以找出影响油菜产量的主要气候因子,建立气象产量模式,为油菜稳产高产提供依据。模式的建立(一)产量资料的处理作物产量可视为趋势产量和气象产量的代数和。气象产量
In Shanghai, the average temperature in January was 3.3 ℃, and the temperature and precipitation patterns from October to May were V-shaped and suitable for planting rapeseed. However, due to the influence of the maritime climate, the weather changes are complicated, the strong cold air in winter goes south and the continuous rainy season in spring affects the growth and development of rapeseed to different degrees, resulting in the decrease of production. Therefore, it is imperative to analyze the favorable and unfavorable climatic conditions during rape growth. In view of the lack of quantitative analysis of the climatic conditions of “Feng”, “Ping” and “Apology” years, this paper attempts to make an exploration in this aspect to find out the main climatic factors that affect the yield of rapeseed and set up the meteorological output model as Rape provides a basis for stable and high yield. The establishment of the model (A) the processing of yield data Crop yield can be regarded as algebraic sum of trend yield and meteorological yield. Meteorological output