作物学报2016，Vol.42Issue(4)：609-618,10.DOI:10.3724/SP.J.1006.2016.00609
北方寒旱区白菜型冬油菜安全越冬的临界指标分析
Critical Index Analysis of Safe Over-wintering Rate of Winter Rapeseed (Bras-sica rapa) in Cold and Arid Region in North China
摘要
Abstract
To research the safe over-wintering rate of winter rapeseed (Brassica rapa) in different ecological areas in North China, to confirm the critical value of over-wintering rate, and to clarify the main factors affecting over-wintering rate, we collected the data of long term multi-location field experiments at 48 ecological sites in 13 provinces and cities and areas in 2011–2014 with winter rapeseed variety Longyou 7, Longyou 6, Longyou 8, Longyou 9, Tianyou 4, Tianyou 2 to analyze the over-wintering rate and yield and the correlations between them. The results indicated that there were significant differences of over-wintering rate in different ecological areas, which ranged from 10%to 99%and the yield also had significant difference in different locations. The over-wintering rates of varieties with strong cold resistance were over 70%. Regression analysis showed a significant linear corre-lation between over-wintering rate and yield, with the regression equation of y=ax+b. The yield increased with the increase of over-wintering rate when the over-wintering rate<70%, and tended to stable when the over-wintering rate was 70%, but didn’t had significant influence on yield when>70%. In conclusion, variety is one of the key factors affecting the over-wintering rate of winter rapeseed. The critical value of safe over-wintering rate in north China is 70%, and the corresponding planting conditions are the strong cold resistant varieties, the extreme lowest temperature–31.79°C, the temperature of winter–7.20°C, annual aver-age temperature 6.38°C, negative cumulative temperatures in winter–997.57°C in planting areas, latitude below 44.83° and lon-gitude over 80.34°.关键词
白菜型/冬油菜/北方寒旱区/越冬率/影响因子/回归分析Key words
Brassica rapa./Winter rapeseed/Cold and arid region in the north of China/Over-wintering rate/Affecting factor/Regression analysis引用本文复制引用
孙万仓,董云,刘海卿,刘自刚,武军艳,李学才,方彦,曾秀存,许耀照,张亚宏..北方寒旱区白菜型冬油菜安全越冬的临界指标分析[J].作物学报,2016,42(4):609-618,10.基金项目
本研究由国家自然科学基金项目(31260334,31460356,31560397),国家现代产业技术体系建设专项(CARS-13),国家重点基础研究发展计划(973计划)项目(2015CB150206),国家农业科技成果转化项目(2014G10000317)和甘肃省自然科学基金项目(14RJZG050)资助。This study was supported by the Natural Science Foundation of China (31260334,31460356,31560397), the China Agriculture Research System (CARS-13), the National Basic Research Program of China (2015CB150206), the National Agricultural Science and Technology Achievements Transformation Projects (2014G10000317), and the Natural Science Foundation of Gansu Province (14RJZG050) （31260334,31460356,31560397）
