关键词: 防治, 防治

Abstract:

To further explore quantitative methods of walnut optimal selection, the paper used principal components analysis to check tree body characteristics (tree age, tree height, diameter at breast height, first branch height, crown width, fruit yield) and fruit characteristics (green walnut weight, kernel weight, kernel shell thickness, three average diameter of kernel, shell seal height, fatty acid content, total sugar content, protein content) of the 8 reselected precocious excellent walnut strains, identified 4 important principal component including 90.2% comprehensive characteristics information of the tree, and listed the 4 important principal component function type, calculated the four important principal component values. The excellent strains comprehensively selected by the four important principal component values were similar to practical phenotype. It proofed that the principal component analysis method of comprehensive selection in walnut quality saplings had applications.