Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (10): 18-24.doi: 10.11924/j.issn.1000-6850.casb19010125

Special Issue: 油料作物 园艺 农业气象

• Research article • Previous Articles     Next Articles

Seeding Dates Influence the No-till Rapeseed Agronomic Traits and Yield in Low Altitude Mountain Areas

Jincheng Yang1(), Jianjian Liu1, Jiaojiao Lin1, Xinzhou Hu1, Zhengyun An1, Hongyan Li1, Guan Qu1, Junhua Feng2, Yuecai Bai3, Zhilin Wu4, Li’an Shi1(), Ru Li5()   

  1. (1)Yuxi Academy of Agricultural Science, Yuxi Yunnan 653100
    (2)Yuanjiang Agricultural Tech Extension Station, Yuanjiang Yunnan 653300
    (3)Tadian Agricultural Science Station in Ershan, Ershan Yunnan 653200
    (4)Yimen Agricultural Tech Extension Station, Yimen Yunnan 651100
    (5)Plant Protection College of Yunnan Agricultural University, Kunming 650201
  • Received:2019-01-24 Revised:2019-04-08 Online:2020-04-05 Published:2020-03-19

Abstract:

To comprehensively assess and recommend the optimum seeding date of no-till rapeseed in low altitude mountain areas, comparisons of no-till rapeseed agronomic traits and yield of 10 seeding dates in 4 altitude areas were carried out from 2011 to 2015 in Yuxi by using grey relation analysis and fuzzy clustering analysis. The results indicated that: (1) there was significant difference of main agronomic traits among different seeding dates, the main agronomic traits of rapeseed of earlier seeding date were better than that of conventional seeding date (October 10); (2) the correlation between yield and main agronomic traits varied in different degrees; (3) the yield of different seeding dates varied in different degrees; (4) the optimum seeding date of no-till rapeseed depended on climate, the best seeding date in warm year was around August 10 -September 10, whereas in cold year it was around August 30 - September 30. Therefore, according to the comprehensive evaluation of the yielding ability and stability of rapeseed of 10 seeding dates during 5 years, the optimum seeding date of August 30 - September 10 is recommended for no-till rapeseed in low altitude mountain areas.

Key words: no-till mountain rapeseed, seeding date, grey relation analysis, fuzzy clustering analysis, warm year, cold year, yielding ability, stability

CLC Number: