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Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (33): 50-54.doi: 10.11924/j.issn.1000-6850.casb2021-0114

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Selection of Suitable Varieties of Winter Green Manure Crops in North China

Zhao Qiu(), Zhang Xinjian, Ning Xiaoguang   

  1. Tianjin Academy of Agricultural Sciences, Tianjin 300192
  • Received:2021-02-01 Revised:2021-04-07 Online:2021-11-25 Published:2022-01-06

Abstract:

20 winter green manure varieties were planted in spring maize area for two consecutive years to choose the suitable manure species for overwintering and turning green in north China, and the biomass and overwintering stability of green manure were used as the evaluation indicators. The results showed that hairy vetch, ryegrass, Orychophragmus violaceus and rye had better coverage before winter and turned green successfully after winter of two years with the biological yield of more than 3400 kg/hm 2, which were winter green manure crops that had earlier growth. The most suitable period for turning over was at the end of April, when Orychophragmus violaceus was at the full bloom stage, hairy vetch was at the initial bloom stage and ryegrass and rye were at booting stage.

Key words: winter green manure, crop rotation, biological yield, overwintering stability, north China

CLC Number: