Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (18): 19-24.doi: 10.11924/j.issn.1000-6850.casb2020-0288

Special Issue: 小麦

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Different Nitrogen Fertilizer Levels: Effects on the Grain Yield Trait and Soil Nutrient of Forage Rye in Tibet

Zhang Guangyu1,2,3(), Shen Zhenxi1,2, Zhong Zhiming1,2(), Cui Jianzhao4, Zhaxi Dunzhu5   

  1. 1Lhmsa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101
    2Engineering and Technology Research Center for Prataculture on the Xizang Plateau, Lhasa 850000
    3University of Chinese Academy of Sciences, Beijing 100049
    4Hi-tech Industrial Development center of Shigatse Science and Technology Bureau, Shigatse Tibet 857000
    5Agricultural and rural Bureau of Dazi District, Lhasa City, Tibet Autonomous Region, Lhasa 850000
  • Received:2020-07-24 Revised:2020-10-19 Online:2021-06-25 Published:2021-07-13
  • Contact: Zhong Zhiming E-mail:zhmnggy.19b@igsnrr.ac.cn;zhongzm@igsnrr.ac.cn

Abstract:

The aims are to investigate the effects of different nitrogen fertilizer levels on seed yield of ‘Dongmu 70’, determine the reasonable fertilizer addition rate for seed production of ‘Dongmu 70’ in the river valley of Tibet, and provide reference for rational fertilizer application in this area. In this study, ‘Dongmu 70’ was used as material, the seed yield and other related indexes were compared under different nitrogen fertilizer levels in 2018-2019. The results showed that nitrogen addition significantly increased soil organic matter, nitrogen and phosphorus. The increase of grain yield was the highest and the nitrogen use efficiency was also relatively high when nitrogen fertilizer level was 225.0 kg/hm2. Therefore, higher nitrogen addition rate is needed to achieve higher grain yield of ‘Dongmu 70’. Increasing nitrogen addition level could increase the panicle number, grain number per panicle and grain yield of ‘Dongmu 70’ and soil organic matter, nitrogen and phosphorus content in the river valley of Tibet.

Key words: valley area of Tibet, different nitrogen fertilizer levels, ‘Dongmu 70’, yield traits, soil nutrient content

CLC Number: