关键词: 小麦, 根系分泌物, 黄瓜, 伴生, 真菌群落结构

Abstract: Based on the meteorological and social-economic statistical data in 1982-2009, and by using agricultural economy-climate model (C-D-C model), this paper analyzed the meteorological sensitivity of the agricultural economy in three representative areas (Luhe District of Nanjing, Xinhua County of Taizhou, and Pizhou County of Xuzhou) of Jiangsu Province. A new model for assessing the economic benefit of agrometeorological services was developed to evaluate the agrometeorological services economic benefit in these areas. There existed somewhat differences in the key meteorological factors and crucial periods affecting the agricultural economy outputs among the three areas, but air temperature had significant positive effects on the agricultural economy outputs in all areas while precipitation had significant negative effects in Luhe District. With the newly developed assessment model, the contributions of various key meteorological factors to the agro-meteorological services were quantified, and the calculation showed that the economic benefit of agrometeorological services in Luhe, Xinhua, and Pizhou in 2009 was about 97.2, 113.0, and 84.5 million Yuan, respectively.

Key words: wheat, root exudate, cucumber, companion cropping, fungal community structure.