The annual mean temperature and other 10 climatic factors were selected as the main factors for comparison by using the method of Euclidean fuzzy distance similitude priority ratio. The sequence of similarity degree o...The annual mean temperature and other 10 climatic factors were selected as the main factors for comparison by using the method of Euclidean fuzzy distance similitude priority ratio. The sequence of similarity degree of climatic and ecological conditions of 126 cities or stations in China and of the main persimmon production region in Japan were analyzed by QBASIC programme. And the China’s suitable climatic and ecological region for introducing Japanese sweet persimmon ( Diospyros kaki ) were divided in the light of practical introduction and cultivation experiments. The authors divided China into 3 climatic and ecological regions according to their suitability for cultivating Japanese sweet persimmon.展开更多
Seven economic characters of 41 selected individuals of Castanea henryi were analyzed with principal component analysis (PCA). Two overall indexes used to evaluate the individual characters were determined and the wei...Seven economic characters of 41 selected individuals of Castanea henryi were analyzed with principal component analysis (PCA). Two overall indexes used to evaluate the individual characters were determined and the weighted value of overall index was taken as the criterion of individual ordination and classification. The authors suggested to reselect the clones among individual with large sized nut and medium sized nut, and attention should be paid on the examining the individuals of small sized nut with fine and special characters. The wild C. henryi should be collected as much as possible and should be preserved as germ plasm resource.展开更多
文摘The annual mean temperature and other 10 climatic factors were selected as the main factors for comparison by using the method of Euclidean fuzzy distance similitude priority ratio. The sequence of similarity degree of climatic and ecological conditions of 126 cities or stations in China and of the main persimmon production region in Japan were analyzed by QBASIC programme. And the China’s suitable climatic and ecological region for introducing Japanese sweet persimmon ( Diospyros kaki ) were divided in the light of practical introduction and cultivation experiments. The authors divided China into 3 climatic and ecological regions according to their suitability for cultivating Japanese sweet persimmon.
文摘Seven economic characters of 41 selected individuals of Castanea henryi were analyzed with principal component analysis (PCA). Two overall indexes used to evaluate the individual characters were determined and the weighted value of overall index was taken as the criterion of individual ordination and classification. The authors suggested to reselect the clones among individual with large sized nut and medium sized nut, and attention should be paid on the examining the individuals of small sized nut with fine and special characters. The wild C. henryi should be collected as much as possible and should be preserved as germ plasm resource.
