Quality analysis and comprehensive evaluation of Juglans regia L.introduced in Xunhua of Qinghai
A total of 12 early maturing and thin-skinned Juglans regia L.varieties introduced and grafted in Xunhua County are taken as research objects to select excellent varieties suitable for culti-vating in Qinghai.The phenotypic characters,nutritional quality and economic traits of each variety are measured.Principal component analysis and comprehensive evaluation are used to select the variety with a comprehensive index better than Liaoning 1,the current main cultivated variety in Qinghai.The results are as follows:There are differences in various indexes among 12 varieties.Four principal components are extracted from 11 main phenotypic characters,nutritional quality and economic traits of different Juglans regia L.varieties.Using the comprehensive evaluation model established in the paper,it is found that the comprehensive indexes of Wen 185 and Lipin 2 are better than that of Liaoning 1.Therefore,Wen 185 and Lipin 2 are excellent early maturing and thin-skinned Juglans regia L.varieties suitable for cultivating in Qinghai,and they are recommended for priority promotion.The research results can provide certain theoretical references for the healthy and sustainable development of Qinghai Juglans regia L.industry.