Abstract:

【OBJECTIVE】 In order to find out the annual average temperature and precipitation changing condition and the effect on crop climate productivity and the crop climate changing condition of Jidong area under the global climate change background.【METHOD】With meteorological and statistics data from 1977 to 2006 of 11 observation stations of Jidong area, based on the analysis of annual average temperature and precipitation variation, using Thornth waite Memorial model, the author calculated the impact of the climate productivity on annual average temperature and precipitation variation of this area. 【RESULT】It showed that: (1) the temperature in this area increased by (0.41-0.75)℃/10a, the volatility of the annual precipitation reduced, but not obviously; (2) In the past 30 years, the climate productivity was in decreasing tendency, but not obviously. The average utilization rate of the climatic productivity was 43.3%, with the increasing tendency; (3) ‘Warm-wet’ climate would increase the climatic productivity by 7%-20.8%; ‘Cold-dry’ climate would decrease the climatic productivity by 7.1%-9.7%, based on the future variation of the climate. 【CONCLUSION】(1) The annual average temperature change in mountain areas, plains and coastal areas showed good consistency, annual precipitation showed the inconsistency; (2) Crop climate productivity increased with the increasing of the annual average temperature and precipitation. Single temperature rising and precipitation increase can make climate productivity increase. The insufficient of precipitation became the major limitation factor rate productivity change. The productivity of this area had great potential; (3) It’s possible to increase production for the none-crop factor; (4) In future climate changing condition, ‘Warm-wet’ climate would have greater advantage of increasing productivity, ‘Cold-dry’ climate would have disadvantage of increasing climate productivity.