珍珠番石榴树适宜负载量的研究

目的]确定珍珠番石榴的适宜负载量。方法]以珍珠番石榴为试材,研究了枝组、主干、单枝、单花序的适宜负载量。结果]单株产量与干径呈显著相关,回归方程为Y=2 085.3X1+4 372.4;枝组产量与枝组粗度呈显著相关,其回归方程为Y=3 956.8X1-4 635.4。枝组留果量(X2)与枝组粗度(X1)和平均果重(X3)的回归方程为:X2=(3 956.8X1-4 635.4)/X3;结果枝平均果重(Y)与结果数(X1)、叶片数(X4)的回归方程为Y=169.064 0-22.372 8X1+1.943 5X4。结果枝产量(Y)与结果数(X1)、枝条粗(X2)、枝条长(X3)的回归方程为Y=39.738 3+64.744 1X1+765.891 5X2-7.949 2X3。结论]珍珠番石榴结果枝留果2~3个、花序留果1个、叶果比为8∶1时较好。

Study on Suitable Fruit Load of Pearl Guava

Objective] The aim was to determine the suitable fruit load of pearl guava.Method] With pearl guava as the tested material,the suitable fruit loads of branch group,trunk,single branch and per-inflorescence were studied.Result] The yield per plant was significantly correlated with the trunk diameter and the regression equation was Y=2 085.3 X1+4 372.4.The yield of branch group was significantly correlated with its diameter,the regression equation was Y=3 956.8X1-4 635.4.The regression equation of fruit number of branch group(X2),branch diameter(X1) and average fruit weight(X3) was X2=(3 956.8X1-4 635.4)/X3.The regression equation of average fruit weight of bearing branch(Y),fruit number(X1) and leaf number(X4) was Y=169.064 0-22.372 8X1+1.943 5X4.The regression equation of the yield of bearing branch(Y),fruit number(X1),branch diameter(X2)and length(X3) was Y=39.738 3+64.744 1X1+765.891 5X2-7.949 2X3.Conclusion] Its better for pearl guava when the fruit number in bearing branch was 2-3 and that in inflorescence was 1 and leaf-fruit ratio was 8∶1.