ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (S1): 275-281. doi: 10.7668/hbnxb.20192424

Special Issue: Soil fertilizer

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Difference of Grain Yield and Nitrogen Recovery Efficiency Between New and Old Waxy Sorghum Cultivars(Lines)in Guizhou Province

GAO Jie1, LI Xiaorong2, FENG Guangcai3, LI Qingfeng1, PENG Qiu1   

  1. 1. Guizhou Institute of Upland Crops, Guizhou Academy of Agricultural Science, Guiyang 550006, China;
    2. Chuxiong Autonomous Prefecture Academy of Agricultural Science, Chuxiong 675000, China;
    3. Poverty Alleviation and Development Office of Qiandongnan Prefecture, Kaili 556000, China
  • Received:2021-06-16 Published:2021-12-28

Abstract: In order to clarify the difference of yield and nitrogen use efficiency between new and old generations of waxy sorghum varieties(lines)in Guizhou, the sorghum cultivars of HYZ, QG8H, HongKN and HeiKN were used as experimental materials, two nitrogen treatments(LN and HN)were set up.The differenceof yield, nitrogen accumulation and nitrogen use characteristics of which were analyzed by split plot design. The results showed that:the yield, dry matter and nitrogen accumulation of 2010s cultivars(HYZ and QG8H)were significantly increased by 25.4%, 25.1% and 33.3%, respectively, compared with those of 1990s cultivars(HeiKN and HongKN). NHI under LN treatment was significantly different among cultivars, but not under HN treatment. Compared with LN, RNAP of 1990s cultivars decreased significantly under HN treatment, with a range of 20.9%, which indicated that the 2010s cultivar had a stronger post-flowering N assimilation capacity, and a stronger grain N accumulation capacity at both low and high N levels.NPFP, NARR, NRE and NFAE of 2010s cultivars were increased by 13.9 kg/kg, 0.7 kg/kg, 20.3% and 4.1 kg/kg, respectively, compared with the 1990s cultivars. Yield, DMA, TNA were significantly positively correlated with NRE, which indicated that the increased yield of waxy sorghum in Guizhou Province might relate to the increase of nitrogen accumulation caused by the improvement of NRE, which provided sufficient nitrogen supply for the normal physiological metabolism of waxy sorghum.

Key words: Sorghum bicolor, Dry matter accumulation, Yield, Nitrogen recovery efficiency

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Cite this article

GAO Jie, LI Xiaorong, FENG Guangcai, LI Qingfeng, PENG Qiu. Difference of Grain Yield and Nitrogen Recovery Efficiency Between New and Old Waxy Sorghum Cultivars(Lines)in Guizhou Province[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(S1): 275-281. doi: 10.7668/hbnxb.20192424.

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