【摘要】 在龙眼末次秋梢充分老熟后,调查梢长、梢粗、复叶数、叶片长、叶片宽、节间长以及叶片干鲜重、叶片色差参数等表观生长指标,通过常规分析各个指标发现弱树与壮树末次梢的长度、粗度、复叶数及叶片宽差异极显著,说明树势越强壮,末次梢表现越长越粗,复叶数也较多,叶片也大。运用SPSS19.0统计分析软件对所有测定指标进行相关分析,建立树势表观预测模型:Y理论树势=-0.148-0.106XC值+0.755X梢粗,依据树势分类和预测模型中的两个预测变量,对分类结果进行判别分析,以验证预测变量的准确率,预测模型的总判别准确率为69.9%。更多还原

【Abstract】 In the last autumn shoot mature period, the index of shoot length and diameter, the number of compound leaf, leaf length and width, internode length, leaf dry weight and fresh weight, leaf colour were investigated in this paper. The results showed that the last autumn shoot length and diameter, the number of compound leaf, leaf width of weak tree vigour was significantly lower than those of plant with strong tree vigour, which indicated that these index had very close relation tree vigour. All index were analyzed by SPSS 19.0 software and the tree vigour prediction model was constructed, Y(theoretical tree vigour)=-0.148-0.106X(the value of C)+0.755X(the value of shoot diameter). The model was tested, accuracy rate reached 69.9%.更多还原