Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (8): 43-49.doi: 10.11924/j.issn.1000-6850.casb20191000745

Special Issue: 油料作物 园艺

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Rapeseed-Grass Mixed Sowing Patterns: Effects on Rapeseed Production and Grassland Productivity

Liu Yong, Ma Xiang(), Qin Yan   

  1. Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau/Qinghai Academy of Animal Science and Veterinary Medicine, Xining 810016
  • Received:2019-10-21 Revised:2019-12-16 Online:2020-03-15 Published:2020-03-10
  • Contact: Xiang Ma E-mail:373536152@qq.com

Abstract:

To screen the pasture types which have the highest mixed sowing benefit with rapeseed in Menyuan, solve the problem of continuous cropping obstacles of rapeseed and improve the productivity of grassland in high altitude area of Qinghai-Tibet Plateau, we conducted the samplings in different periods to study the effects of rapeseed mixed with common vetch, hulless barley and oats on the productivity of pasture, and judged the advantages and disadvantages of each mixed combination by the land equivalent ratio. The results showed that: the rapeseed-oat mixed sowing had the highest dry weight on July 6 with a unit area of 174.48 g; on July 21, the fresh weight and fresh-to-dry ratio were both the highest, and the plant height was 97.02% significantly higher than that of rapeseed monoculture on August 15 (P<0.05), and the highest fresh weight was 2817.00 g; on September 11, the plant height of rapeseed-hulless barley and rapeseed-oat mixed sowing was significantly higher than that of rapeseed monoculture (P<0.05), by 64.33% and 99.68%, respectively; the highest dry weight was 589.00 g, 147.51% higher than that of rapeseed monoculture. In conclusion, the mixed sowing of rapeseed-common vetch and rapeseed-oat both have the advantage of yield, and the rapeseed-oat mixed sowing has the highest land equivalent ratio of 1.11 with the best land use effect.

Key words: rapeseed, mixed sowing, productivity, land equivalent ratio

CLC Number: