关键词: 农田生物多样性, 转基因作物, 耕作方式, 地膜覆盖, 农药, 化肥

Abstract: According to the Specifications for Assessment of Forest Ecosystem Services in China (LY/T 1721-2008), and based on the fifth and sixth forest resource investigation data of Jiangxi Province, longterm monitoring data from Jiangxi forest ecology stations, published data, and social public data, a dynamic analysis was made on the broadleaved forest ecosystem services values in Jiangxi Province between the ninth (1996-2000) and the tenth (2001-2005) fiveyear periods. The total value of the services in the ninth and tenth five-year periods was 188 and 201 billion Yuan per year and 111 and 110 thousand Yuan per hectare, respectively, with the total value per year from the ninth to the tenth five-year periods increased by 6.91% and that per area decreased by 0.95%. In the total services value, the services values of biodiversity conservation, carbon fixation, and oxygen release as well as their proportions increased most rapidly. In the two five-year periods, the net productivity of the broadleaved forests in the Province had a slow increase, which might lead to a slight difference in the permutation order of six services values. Nevertheless, the services values of water conservation, biodiversity conservation, carbon fixation, and oxygen release composed about 95% of the total services value. At the time of guaranteeing forest quality, to increase the broadleaved forest area through the preservation and restoration of broadleaved forest, reconstruction of deteriorated forest, and conversion of farmland to forest land could be the efficient way to improve the total services value of the broadleaved forest ecosystem in the Province.

Key words: agricultural biodiversity, transgenic crops, cultivation pattern, plastic mulching, pesticide, chemical fertilizer.