Abstract:

Based on the daily meteorological data set at 34 ground weather stations from 1971 to 2010 in Chongqing, the climatic potential productivity of vegetables was anlayzed by methods of a Mann-Kendall and an empirical orthogonal function (EOF) combining the climatic potential productivity model developed by Zhou Guangsheng. The results indicate that the mean annual climatic potential productivity of vegetables is in a decreasing trend and has a significant abrupt change because of decreasing precipitation. The climatic potential productivity of vegetables is higher in the southeast and west-northeast of Chongqing. The climatic potential productivity has obvious local differences. The warm and wet climate is favourable to the growth of vegetables in Chongqing.

Key words: Vegetable, Climatic potential productivity, EOF (empirical orthogonal function), Abrupt change, Climatic change