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本试验于1984—1985年研究了红星、金冠、国光三个品种的主干与树体合理负载量的相关性,提出了以干周作为干粗指标的单株负载量的定量预测回归方程式:红星y=3.10x-77.26;国光y=2.02x-14.24;金冠y=3.69x-42.78。研究表明,干周、干周平方、主干横断面积均可作为干粗指标,但以干周最为理想,且在实际运用中简单、方便,便于推广。
In this experiment, the correlation between the trunk and the tree body’s reasonable load of the three varieties of red star, golden crown and guoguang were studied in 1984-1985. The regression equation of quantitative prediction of the single plant’s load with dry week as the dry index was proposed: y = 3.10x-77.26; Guoguang y = 2.02x-14.24; Golden Delicious y = 3.69x-42.78. The results show that dry weeks, dry weeks square, trunk cross-sectional area can be used as a dry index, but the dry week is the most ideal, and in practical applications is simple, convenient and easy to promote.