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    童龙, 张磊, 李彬, 耿养会, 谢锦忠, 张玮, 陈丽洁. 钩梢对麻竹叶片C、N、P化学计量特征的影响[J]. 北京林业大学学报, 2018, 40(11): 69-75. DOI: 10.13332/j.1000--1522.20180216
    引用本文: 童龙, 张磊, 李彬, 耿养会, 谢锦忠, 张玮, 陈丽洁. 钩梢对麻竹叶片C、N、P化学计量特征的影响[J]. 北京林业大学学报, 2018, 40(11): 69-75. DOI: 10.13332/j.1000--1522.20180216
    Tong Long, Zhang Lei, Li Bin, Geng Yanghui, Xie Jinzhong, Zhang Wei, Chen Lijie. Effects of different truncation treatments on the stoichiometry of C, N and P in leaves of Dendrocalamus latiflorus[J]. Journal of Beijing Forestry University, 2018, 40(11): 69-75. DOI: 10.13332/j.1000--1522.20180216
    Citation: Tong Long, Zhang Lei, Li Bin, Geng Yanghui, Xie Jinzhong, Zhang Wei, Chen Lijie. Effects of different truncation treatments on the stoichiometry of C, N and P in leaves of Dendrocalamus latiflorus[J]. Journal of Beijing Forestry University, 2018, 40(11): 69-75. DOI: 10.13332/j.1000--1522.20180216

    钩梢对麻竹叶片C、N、P化学计量特征的影响

    Effects of different truncation treatments on the stoichiometry of C, N and P in leaves of Dendrocalamus latiflorus

    • 摘要:
      目的麻竹钩梢是一种人为干扰的营林措施,通过钩梢处理能够消弱其立竹顶端优势,提高单株立竹商品竹叶的产量。本文目的为进一步丰富麻竹钩稍研究理论,为其生产经营提供相关的科学依据。
      方法以不钩梢麻竹为对照,对麻竹进行轻度、中度、重度钩梢处理,通过测定1~3年生麻竹叶片C、N、P含量,同时对其C/N、C/P和N/P的比值做相关性分析,初步探讨了麻竹叶片化学计量特征对不同钩稍强度的响应。
      结果结果表明:与不钩梢相比,3组钩稍处理下,1~3年生麻竹叶片的全C、N、P含量以及C/N、C/P、N/P比值差别较大。其中1和2年生麻竹叶片C含量在不同钩梢处理间均表现为中度钩梢﹥轻度钩梢﹥重度钩梢﹥不钩梢,最大值为最小值的1.24倍。中度钩梢处理下,1年生麻竹叶片C、N、P含量分别比对照高6.8%、11.5%、低1.5%;对于2年生麻竹而言,3组钩梢处理的C/P分别比对照高1.2%、6.8%和低5.0%。不钩梢麻竹叶片N/P值范围13.65~14.19,平均值为13.99,表明麻竹生长过程中主要受到N元素的限制。随着钩稍强度的增大,1~3年生麻竹叶片N含量显著增加,且与不钩梢处理达到显著差异。
      结论本试验表明:麻竹叶片C、N、P化学计量对钩梢处理有一定程度的适应,适度的钩稍有利于提高麻竹生产力,对其生长具有一定的促进作用。

       

      Abstract:
      ObjectiveObtruncation is a kind of man-made disturbance during the Dendrocalamus latiflorus culture and management. The top edge of bamboo can be weakened and the yield of commercial bamboo leaves of single stand bamboo can be increased through the truncation treatment. The purpose of this paper is to further enrich the research theory of truncation treatment of D. latiflorus and provide scientific basis for its production and operation.
      MethodIn this study, D. latiflorus as the test material, the chemical measurements of carbon (C), nitrogen (N) and phosphorus (P) of 4 kinds (CK: no truncation/control, light truncation, medium truncation, heavy truncation) of 1-3 years old D. latiflorus were studied, in order to investigate the response of stoichiometry of D. latiflorus leaves by different truncation intensities.
      ResultThe results showed that the contents of total C, N, P and C/N, C/P, N/P values of 1-3 years old D. latiflorus leaves were significantly different under the three truncation treatments compared with control. Among them, the content of C of D. latiflorus leaves under three truncation treatments and control were displayed in the order of medium truncation > light truncation > heavy truncation > no truncation, and the maximum value was 1.24 times of the minimum value. Under the medium truncation treatment, the contents of C, N and P of 1 year old D. latiflorus leaves were 6.8% higher, 11.5% higher and 1.5% lower than control, respectively. For the 2 years old D. latiflorus, the C/P value of the three truncation treatments was 1.2% higher, 6.8% higher and 5.0% lower than control, respectively. The N/P value range of no truncation treatment D. latiflorus leaves was 13.65-14.19, and the average value was 13.99, and indicating that the growth of D. latiflorus was mainly restricted by N elements. With the strength of truncation treatment was increased, N contents of 1-3 years old D. latiflorus leaves increased significantly compared with no truncation treatment.
      ConclusionIt is showed that the stoichiometry of C, N and P in leaves of D. latiflorus can adapt to the truncation treatment to some extent, and the moderate truncation treatment can improve the productivity of D. latiflorus, and plays a positive role on its growth.

       

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