ACTA AGRICULTURAE BOREALI-SINICA ›› 2013, Vol. 28 ›› Issue (3): 116-120. doi: 10.3969/j.issn.1000-7091.2013.03.021

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Effects of Harvesting Stage on Biomass and Content of N,P and K of Hybrid Varieties in Miscanthus

Yi Zhenxie1, Wang Yu1, Lin Cong1, Wang Xuehua1, Tu Naimei2   

  1. 1. College of Agronomy,Hunan Agricultural University, Changsha 410128,China;
    2. College of Bioscience and Biotechnology,Hunan Agricultural University, Changsha 410128,China
  • Received:2013-03-17 Published:2013-06-28

Abstract: Effects of harvesting stage on botany characters,biomass and content of N,P and K of hybrid varieties in Miscanthus were studied with three hybrid varieties as materials. The results showed that: with the delay of harvesting stage,biomass of three varieties was decreased, significant decrease of biomass of Xiangzamang No. 2 and Xiangzamang No. 3 began on 20th Oct,while that of Xiangzamang No. 1 began on 20th Nev. Biomass of three varieties was over 40 t /ha on 20th Dec,and it was 40. 6, 38. 8, 31. 6 t /ha on 20th Jan, respectively. SPAD value of leaves and water content of three varieties showed decrease trend from 20th Oct,while the varietal difference in significant decrease stage was observed. Content of N,P and K of three varieties showed decrease trend from 20th Oct,while the varietal difference in significant decrease stage of N and K was observed. Looked from the average of three varieties,content of N,P and K was 1. 1%,0. 15% and 0. 76% respectively on 20th Oct,while it decreased to 0. 32%,0. 07% and 0. 20% respectively on 20th Jan. Comprehensively considered SPAD value of leaves,biomass,content and accumulation of N,P and K, the optimal harvesting stage of Xiangzamang No. 2 should be after 20th Dec,and that of Xiangzamang No. 3 and Xiangzamang No. 1 should be after 20th Dec.

Key words: Miscanthus, Harvesting stage, Biomass, Content of N, P and K

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Cite this article

Yi Zhenxie, Wang Yu, Lin Cong, Wang Xuehua, Tu Naimei, Yi Zili. Effects of Harvesting Stage on Biomass and Content of N,P and K of Hybrid Varieties in Miscanthus[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(3): 116-120. doi: 10.3969/j.issn.1000-7091.2013.03.021.

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