Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (36): 237-242.doi: 10.11924/j.issn.1000-6850.casb15070003

Special Issue: 油料作物 农业气象

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Quantitative Evaluation of Climate Condition for Sunflower Growth:Taking Hetao Irrigation Area for Example

Li Sihui1,2, Zhao Huiying3, Hou Qiong1, Sun Linli2, Zhao Fang3   

  1. (1Inner Mongolia Ecology and Agrometeorology Center, Hohhot 010051;2Meteorological Bureau of Tongliao City, Tongliao Inner Mongolia 028000;3Heilongjiang Institute of Meteorological Science, Harbin 150030)
  • Received:2015-07-01 Revised:2015-11-29 Accepted:2015-08-04 Online:2015-12-30 Published:2015-12-30

Abstract: To reveal meteorological environment demand of sunflower’s high yield, climate condition was evaluated quantitatively in the whole growth duration of sunflower in connection with temperature and sunshine effect on sunflower’s growth and yield. Based on the method of statistical analysis, expanded factor and multiple integral regression, the suitable agrometeorological index was set up including all growth stages and by 10 days, covering the entire sunflower growth and development in Hetao Irrigation Area. Dynamic evaluation equation was established in temperature and sunshine factor by 10 days, by using the growth and development data, the meteorological data and sunflower yield from 1987 to 2011 in Hetao irrigation area. The results showed that the maximum positive effect of temperature was 58.7 kg/(hm2·℃) in the of beginning of June and the middle of August. Temperature played a dominant role to a certain extent in the above stage. The maximum negative effect of sunshine was 8.6 kg/(hm2·h) in the late of May and the late of August. For Hetao irrigation area, the influence of heat condition was greater than that of light condition in sunflower production.