前言 预测果树的主要物候期和产量、品质,对广大果树工作者(包括栽培、商业及加工).可以加强计划性,减少浪费和损失,其作用极大;例如浙江省黄岩县,是全国以县为单位产量最多的一个县,1974年柑桔大丰收,但是商业部门对产量虽多次预测.,但不准确,成熟前一再超产。柑桔是国家二类 Foreword Predict the main phenophase and yield and quality of fruit trees, which can greatly enhance the planning, reduce waste and loss of the majority of fruit tree workers (including cultivation, commerce and processing), and have a great effect. For example, Huangyan County in Zhejiang Province County is the most productive county in terms of harvest of citrus in 1974. However, the commercial sector has repeatedly predicted the output, but it is inaccurate and overcrowded before maturity. Citrus is a national second class