Impacts of Varying Habitats on the External Morphological Structure of Ageratina adenophora Leaves

doi:10.11923/j.issn.2095-4050.cjas2022-0116

Abstract

Abstract:

To investigate the external morphological structure of Ageratina adenophora leaves in various habitats, the key environmental factors controlling different external morphological structure of A. adenophora leaves were analyzed and discussed. This project was carried out in the campus of Yuxi Normal University of Yunnan Province. 10 local common habitats were selected to investigate the length, width, ratio of length to width, leaf area, number and proportion of serrations on both sides of the leaf edge of A. adenophora in each habitat, and to analyze the impacts of different environmental factors as well as their combinations on the external morphological structure of A. adenophora leaves. The study results showed that the three groups of data including leaf length, width and leaf area of A. adenophora obviously changed among the 10 selected habitats, and their change patterns were also consistent; the order from large to small was: artificial cultivation (shade) > farmland ≈ artificial cultivation (full light) ≈ pond side (wet) > farmland ridge ≈ forest gap > forest shade > road edge (shade) ≈ pond side (dry) > road edge (full light). There was no significant difference in the ratio of leaf length to width among the 10 selected habitats, which was about 1.35; the numbers of serrations on both sides of the leaf edge were both about 12 in the 10 habitats, and the ratio of serrations on both sides was about 1.00. The analysis results of the investigation data also fully proved that the impacts of light intensity, soil moisture and nutrient content as well as the interactions of the three environmental factors on the length, width and leaf area of A. adenophora reached an extremely significant level, but the effects on the shape of leaves and the number and proportion of serrations on both sides of the leaf edge were apparently weak.

Key words: Ageratina adenophora, leaf, leaf edge, light intensity, soil moisture, soil nutrient content

YANG Nanxi, LIU Xianbin, ZHAO Xingshuo, DONG Han. Impacts of Varying Habitats on the External Morphological Structure of Ageratina adenophora Leaves[J]. Journal of Agriculture, 2023, 13(9): 46-53.

Figures/Tables 4

References 40

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序号	生境名称	位置	环境特征
1	路基（阳）	柏油路路边无遮荫破损处	地上部无行道树遮荫，全光照；地下部根系生长在石子碎屑中，无明显土壤接触
2	路基（荫）	柏油路路边行道树树荫下破损处	地上部有行道树树冠遮荫；地下部根系生长在石子碎屑中，无明显土壤接触
3	林下	山顶茂密森林林冠下	地上部有森林林冠遮荫，光照强度弱；地下部根系生长在原生土中，地表有凋落物覆盖
4	林窗	山顶茂密森林倒木林窗处	地上部有林间全光照射，光照强度强；地下部根系生长在原生土中，地表有凋落物覆盖
5	池塘边（干）	山顶人工池塘塘顶干涸处	地上部全光照，光照强度强；地下部根系生长在池塘塘顶，土壤含水量和养分含量低
6	池塘边（湿）	山顶人工池塘浸水边缘湿润处	地上部全光照，光照强度强；地下部根系生长在池塘浸水处，土壤含水量和养分含量高
7	田埂	学校东门苗圃路边田埂处	地上部全光照，光照强度强；无人工耕作和施肥，土壤养分含量相对较低
8	田间	学校东门苗圃人工耕作田间	地上部全光照，光照强度强；有人工耕作和长年施肥，土壤养分含量相对较高
9	栽培（阳）	学校玻璃温室内人工全光照栽培	地上部全光照，光照强度强；基质栽培，标准霍格兰营养液配方；光、水、肥环境齐全
10	栽培（荫）	学校玻璃温室内人工半遮荫栽培	地上部遮荫，光照强度弱；基质栽培，标准霍格兰营养液配方；弱光、高水、高肥

序号	生境名称	位置	环境特征
1	路基（阳）	柏油路路边无遮荫破损处	地上部无行道树遮荫，全光照；地下部根系生长在石子碎屑中，无明显土壤接触
2	路基（荫）	柏油路路边行道树树荫下破损处	地上部有行道树树冠遮荫；地下部根系生长在石子碎屑中，无明显土壤接触
3	林下	山顶茂密森林林冠下	地上部有森林林冠遮荫，光照强度弱；地下部根系生长在原生土中，地表有凋落物覆盖
4	林窗	山顶茂密森林倒木林窗处	地上部有林间全光照射，光照强度强；地下部根系生长在原生土中，地表有凋落物覆盖
5	池塘边（干）	山顶人工池塘塘顶干涸处	地上部全光照，光照强度强；地下部根系生长在池塘塘顶，土壤含水量和养分含量低
6	池塘边（湿）	山顶人工池塘浸水边缘湿润处	地上部全光照，光照强度强；地下部根系生长在池塘浸水处，土壤含水量和养分含量高
7	田埂	学校东门苗圃路边田埂处	地上部全光照，光照强度强；无人工耕作和施肥，土壤养分含量相对较低
8	田间	学校东门苗圃人工耕作田间	地上部全光照，光照强度强；有人工耕作和长年施肥，土壤养分含量相对较高
9	栽培（阳）	学校玻璃温室内人工全光照栽培	地上部全光照，光照强度强；基质栽培，标准霍格兰营养液配方；光、水、肥环境齐全
10	栽培（荫）	学校玻璃温室内人工半遮荫栽培	地上部遮荫，光照强度弱；基质栽培，标准霍格兰营养液配方；弱光、高水、高肥

环境影响因子	叶长	叶宽	叶长/叶宽	叶面积	叶左缘锯齿	右叶缘锯齿	左叶缘锯齿/右叶缘锯齿
光照强度	<0.001	<0.001	0.308	<0.001	0.127	0.149	0.950
土壤水分	<0.001	<0.001	0.255	<0.001	0.799	0.852	0.969
土壤养分	<0.001	<0.001	0.474	<0.001	0.929	0.552	0.112
光照强度+土壤水分	<0.001	<0.001	0.096	<0.001	0.311	0.609	0.441
光照强度+土壤养分	<0.001	<0.001	0.089	<0.001	0.599	0.339	0.192
土壤水分+土壤养分	<0.001	<0.001	0.373	<0.001	0.687	0.402	0.107
光照强度+土壤水分+土壤养分	<0.001	<0.001	0.699	<0.001	0.323	0.350	0.979

环境影响因子	叶长	叶宽	叶长/叶宽	叶面积	叶左缘锯齿	右叶缘锯齿	左叶缘锯齿/右叶缘锯齿
光照强度	<0.001	<0.001	0.308	<0.001	0.127	0.149	0.950
土壤水分	<0.001	<0.001	0.255	<0.001	0.799	0.852	0.969
土壤养分	<0.001	<0.001	0.474	<0.001	0.929	0.552	0.112
光照强度+土壤水分	<0.001	<0.001	0.096	<0.001	0.311	0.609	0.441
光照强度+土壤养分	<0.001	<0.001	0.089	<0.001	0.599	0.339	0.192
土壤水分+土壤养分	<0.001	<0.001	0.373	<0.001	0.687	0.402	0.107
光照强度+土壤水分+土壤养分	<0.001	<0.001	0.699	<0.001	0.323	0.350	0.979