Chinese Journal of Agrometeorology ›› 2018, Vol. 39 ›› Issue (11): 715-724.doi: 10.3969/j.issn.1000-6362.2018.11.003

Previous Articles     Next Articles

Changes of Growth Stage for Spring Soybean in Jilin Province and Its Response to Climate Warming

QIU Yi-xuan, MA Shu-qing, LI Xiu-fen   

  1. 1.Climate Center of Jilin Province, Changchun 130062, China; 2.Meteorological Observatory of Jilin Province, Changchun 130062; 3.Heilongjiang Institute of Meteorological Sciences, Harbin 150030
  • Online:2018-11-20 Published:2018-11-13

Abstract:

Based on the soybean growth stages and climate data in 4 representative stations from 1981 to 2014 in Jilin Province, the change trends of main soybean growth stages and its relationship with climate warming were analyzed, the influence pattern of temperature on soybean growth rate was established. The results showed that the temporal and spatial variation of soybean growth in Jilin Province was obvious, the average sowing date of soybean was May 4, and the maturing date was September 24, the whole growth season of soybean was 143 days and the active accumulated temperature was 2640.8℃?d. The growth season of soybean delayed in eastern region of Jilin Province, the mean temperature and active accumulated temperature were both lower. The abrupt change of the mean temperature appeared in the 1990s in soybean production area of Jilin Province, the mean temperature during main growth season of soybean fluctuated at upward trend significantly (P<0.01), the mean temperature from May to September increased by 0.34℃•10y−1, and the mean temperature from seedling emergence to maturity increased by 0.43℃•10y−1. In the latest 34 years, the date of soybean sowing, emergence and third leaf was delayed significantly (P<0.05), but there was no significant change for soybean maturity date. The vegetative growth phase of soybean showed a more significant response to climate warming. The whole growth season decreased gradually (P<0.01). The soybean growth rate was positively correlated with mean temperature significantly (P<0.01), the soybean growth was accelerated with climate warming. During the whole growth season of spring soybean, if the mean temperature rose by 1℃, the soybean growth rate increased by 2.8%, and growth season decreased approximately 5.4 days.

Key words: Spring soybean, Growth rate, Climate warming, Jilin Province