秋竹、短穗竹等竹子的化学计量研究毕业论文_生态学毕业论文

秋竹、短穗竹等竹子的化学计量研究毕业论文

2021-04-27更新

摘 要

本文主要研究探讨相同土壤条件下,秋竹(Pleioblastus gozadakensis Nakai)、短穗竹(Brachystachyum densiflorum(Rendle)Keng)、唐竹(Sinobambusa tootsik(Sieb.)Makino)、人面竹(Phyllostachys aurea Carr. ex A. et C. Riv.)及毛毛竹( Phyllostachys suijiangensis Yi)的C、N、P化学计量,以及相互之间的C/N和N/P。最终研究结果表明:相同土壤条件下,C、N、P元素在各个竹种的不同部位含量不尽相同。并且其含量以及C:N,N:P符合一定植物生长发育规律。主要研究结果如下:

  1. C元素在几大竹种秆枝叶部位含量都较高。除人面竹秆C含量偏低外,其他都没有显著差距,体现出C元素在生物体中的重要性。
  2. N元素在竹叶中的含量远高于秆和枝,其中又以人面竹叶N含量最高。N是叶绿素的首要组成元素,叶绿素又存在于叶片中。可知叶片中叶绿素含量高低:人面竹>短穗竹>秋竹>毛毛竹>唐竹。
  3. P元素同样竹叶部分含量远大于秆和枝,其中以秋竹为最。P元素主要用于光合作用和有机合成,光合作用主要还是作用于叶片部位。同时可知秋竹叶片光合作用高于其他竹种,适合其生长在贫瘠之地。
  4. 几种竹种的C、N比值在竹叶部位无显著差异,在秆枝部位产生差异。C:N反应养分利用效率,可知这几大竹种在相同的土壤环境下,叶片的养分利用效率大体一致,有利于研究其余部位所需养分。
  5. 植物的生长速率与叶片的N:P呈负相关,又与P含量呈正相关。几类竹种竹叶的N、P比值同样比秆枝高,而不同竹种间,唐竹>人面竹>短穗竹>毛毛竹>秋竹。可得,秋竹的生长速率最快,人面竹与唐竹生长速率较慢。

关键词:化学计量学;养分利用;生长速率;竹子

Researches on the stoichiometry of five bamboo species such as Pleioblastus gozadakensis and Brachystachyum densiflorum

ABSTARCT

It is discussed that the stoichiometry of C、N、P and C/N and N/P between the Pleioblastus gozadakensis, Brachystachyum densiflorum, Sinobambusa tootsik,

Phyllostachys aurea, Phyllostachys pubescens and Phyllostachys suijiangensis Yi under the same soil conditions. The results show that the contents of C, N and P elements are different in different parts of bamboo species under the same soil conditions.Moreover, its C:N,N:P and content conform to the growth and development law of certain plants. The main research results are as follows:

  1. The content of element C was higher in the stems, branches and leaves of several bamboo species.Except for the low content of C in bamboo culm of Phyllostachys aurea, there is no significant difference, which shows the importance of C element in organism.
  2. The content of N element in bamboo leaves is much higher than that of culms and branches, among which the content of N element in the leaves of Phyllostachys aurea is the highest. N is an important component of chlorophyll, which mainly exists in leaves. It can be seen that the chlorophyll content of leaves is ranked: Phyllostachys aurea>Brachystachyum densiflorum>Pleioblastus gozadakensis>Phyllostachys suijiangensis YiSinobambusa tootsik.
  3. The content of P element was also much higher than that of stem and branch, among which Pleioblastus gozadakensis was the most important. P is mainly used for photosynthesis and organic synthesis, and photosynthesis is mainly applied to leaf parts.At the same time, it can be seen that the photosynthesis of Pleioblastus gozadakensis leaves is higher than that of other bamboo species, which is suitable for its growth in barren land.
  4. The C and N ratios of several bamboo species are roughly the same at the bamboo leaf site, and there are differences at the stalk site.C:N reaction nutrient utilization efficiency. It can be seen that under the same soil environment, the nutrient utilization efficiency of the leaves of these bamboos is basically the same, which is conducive to the study of nutrients needed for the rest of the parts.

The growth rate of plants is negatively correlated with N:P of leaves, and positively correlated with P content. The ratio of N to P of bamboo leaves of several kinds of bamboo is also higher than that of culms and branches, while among different bamboo species, Sinobambusa tootsikPhyllostachys aurea>Brachystachyum densiflorum> Yushania suijiangensis YiPleioblastus gozadakensis. It can be concluded that the growth rate of Pleioblastus gozadakensis is the fastest, Sinobambusa tootsik and Phyllostachys aurea are relatively slow.

Key words: stoichiometry;nutrient utilization;growth rate;bamboo

目 录

1 前言………………………………………………………………………………………………1

1.1 研究目的与意义……………………………………………………………………………1

1.2 国内外研究现状……………………………………………………………………………2

1.2.1化学计量学的发展…………………………………………………………………2

1.2.2实验竹种的研究……………………………………………………………………2

2 材料与方法………………………………………………………………………………………4

2.1 研究地概况…………………………………………………………………………………4

2.2 实验材料……………………………………………………………………………………4

2.3 实验设计方法………………………………………………………………………………4

2.3.1 竹秆处理……………………………………………………………………………4

2.3.2 竹枝处理……………………………………………………………………………4

2.3.3 竹叶处理……………………………………………………………………………5

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