| This article has been：Browse 2005Times Download 1339Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.20180685 |
|
| Characteristics of Climate Change in Qingzhen from 1985 to 2015 and Its Relativity with Grain Yield |
|
ZHANG Hao, XU Xiao, ZHANG Xuebin,JIN Zhaogui, CHEN Yu，XU YI,YUAN Shifeng,WANG Shenghong, LIU Yupeng, DENG Tingfei，QIN Jie, YUAN Shuo，XU Rengxiang
|
|
1.Meteorological Bureau of Qingzhen, Qingzhen 551400, China; 2.Country-First level Agrometeorological Test Station in Guiyang, Qingzhen 551400, China; 3. Meteorological Bureau of Guiyang, Guiyang 550002, China; 4. Guizhou Institute of Mountainous Climate, Guiyang 550002, China； 5.Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
|
| Abstract: |
| 【Objective】The purpose of this paper is to get the characteristics of climate change and the correlation between meteorological factors and grain yield from 1985 to 2015 of Qingzhen.【Method】Based on the annual average meteorological data (wind speed, sea level pressure, precipitation, temperature, sunshine hour, relative humidity and evaporation) of Qingzhen, the characteristics of climate change in recent 30 years were obtained by M-K test and wavelet analysis. Firstly, the grain yield was separated by HP filter, and then the correlations between yield and climatic factors were calculated by RDA. 【Result】The temperature increased significantly, and there were sudden change in 1994 and 1997. Other factors showed decreasing trends, and the sudden change of sunshine hours occurred the most frequently. The oscillation period of each factor was different, and the change period was the most prominent in 28 years. At present, except for the temperature, other factors were in the low stage. There were positive and negative impacts on grain output from climate change. The maximum positive impact occurred in 2009, and the greatest negative impact occurred in 1990 and 2011. 【Conclusion】Monte Carlo test showed that there was a significant correlation between climatic factors and yield (P<0.05). 43.3% of grain yield could be explained by selected climatic factors. Climatic yield was positively correlated with precipitation, temperature and relative humidity. It was negatively correlated with wind speed, sea level pressure, evaporation and sunshine duration. |
| Key words: climatic variation； grain yield； relativity |
|
|
