The accumulated temperature characteristic of rape at different growth period in alpine region

doi:10.14088/j.cnki.issn0439-8114.2019.14.010

Abstract

Abstract: Based on the growth period and meteorological observation data of spring rape from Guinan meteorological bureau during 1991—2017, the different accumulated temperature changes of different growing periods of rapeseed in the alpine frigid plateau region were studied by adopting the trend analysis method, Mann-Kendall catastrophe analysis method and coefficient of variation method. The results showed that during the growth period of rape in Guinan county in the alpine region from 1991 to 2017, the accumulated temperature from stable through 0 ℃ time to sowing time, and accumulated temperature from sowing period to mature period showed a significant increase trend, while the accumulated temperature from emerging time to five euphylla period showed a very significant increase trend. During the growth period of rape in Guinan county in the alpine region, the accumulated temperature from sowing time to emerging time and from peduncle growth stage to flowing time and from five euphylla time to squaring period all showed no significant decrease trend with the interannual extension, while the accumulated temperature from squaring period to peduncle growth stage and from flowering period to mature period increased no significantly with the interannual extension. The annual variation of the accumulated temperature from sowing to mature period and from flowering to mature period was the smallest, while the accumulated temperature from stable through 0 ℃ to sowing period, from squaring period to peduncle growth period, from five euphylla to squaring period, from peduncle growth to flowering period, from emerging to five euphylla period and from sowing to emerging period had a large annual variation, and the coefficient of variation was between 0.27 and 0.62. Mann-Kendall catastrophe analysis showed that the accumulated temperature from emerging to five euphylla period, from flowering to mature stage and from sowing to mature stage showed a abrupt increasing trend in 2003, 2001 and 2004, respectively.

Key words: rape, growth period, mutation, alpine region, change characteristics

CLC Number:

GUO Lian-yun. The accumulated temperature characteristic of rape at different growth period in alpine region[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(14): 41-45.

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