关键词: 玉米, 玉米, 干旱胁迫, Burkholderia sp. LD-11, 荧光参数, 吲哚乙酸

Abstract: The paper aims to grasp the characteristics of climate change in Xiangxi under the background of global warming, and to mitigate the adverse effects of climate change on agricultural production. Based on the daily meteorological observation data of 8 counties’meteorological stations in Xiangxi from 1960 to 2017 and the observation data of Guzhang national agro- meteorological observation station, we studied the change characteristics of temperature, precipitation, relative humidity and sunshine hours in Xiangxi and the impact on agriculture from 1960 to 2017 by means of sliding mean, linear fitting, M-K test and wavelet analysis. The results showed that: the annual average temperature rose more obviously with the rate of 0.81℃/58 a from 1960 to 2017; the interdecadal variation of temperature was obvious, and the temperature rose significantly from the beginning of the 21st century; the temperature rose significantly in winter and spring while not obviously in summer; the annual precipitation had no significant trend change, the interannual fluctuation was relatively large; and the relative humidity and sunshine hours were decreasing. The growth period of rice and rape decreased obviously and the yield declined. Climate change has a certain impact on the layout of agricultural production, crop growth, yield and quality.