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温远光,杨柳,朱宏光,蔡道雄,尤业明,贾宏炎,周晓果,严理.除草剂对桉树×降香黄檀混交林下植物功能群的影响[J].广西科学,2015,22(6):578-585. [点击复制]
- WEN Yuan-guang,YANG Liu,ZHU Hong-guang,CAI Dao-xiong,YOU Ye-ming,JIA Hong-yan,ZHOU Xiao-guo,YAN Li.Effects of Herbicide Applications on Plant Functional Groups in Mixed Eucalyptus×Dalbergia odorifera Plantations in Subtropical China[J].Guangxi Sciences,2015,22(6):578-585. [点击复制]
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| 除草剂对桉树×降香黄檀混交林下植物功能群的影响 |
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温远光1, 杨柳1, 朱宏光1, 蔡道雄2, 尤业明1, 贾宏炎2, 周晓果1, 严理1
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| (1.广西大学林学院, 亚热带农业生物资源保护与利用国家重点实验室, 广西南宁 530004;2.中国林业科学研究院热带林业实验中心, 广西凭祥 532600) |
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| 摘要: |
| [目的]了解在炼山和非炼山条件下草甘膦除草剂的应用对桉树×降香黄檀混交林下植物功能群的影响。[方法]通过炼山+除草剂、不炼山+除草剂和对照(不炼山不施除草剂)的控制性试验,研究林下植物群落组成、植物功能群对除草剂的响应及分异规律。[结果]与对照比较,除草剂施用1年后,林下植物群落有很高的相似性(Jaccard相似性指数>0.7),但群落的恒有种特别是稀有种数量存在较大差异。不炼山+除草剂处理的恒有种分别比炼山+除草剂、对照处理的高37.50%和57.14%,而稀有种则由2种分别增至24种和7种。这一结果说明炼山+除草剂条件有利于稀有种的发育,而不炼山+除草剂条件则有利于恒有种的发展。炼山+除草剂处理增加禾草和豆科植物功能群的丰富度,不炼山+除草剂处理降低藤本和木本植物功能群的丰富度,但只有木本植物丰富度的差异达显著水平。炼山+除草剂处理降低杂草、禾草和豆科植物功能群的相对多度和相对盖度,显著降低蕨类植物的相对多度和相对盖度;不炼山+除草剂处理显著降低木本植物的相对盖度。[结论]低浓度、低频率的除草剂(草甘膦)应用对林下植物功能群的影响是初期和短期的。 |
| 关键词: 植物功能群 除草剂 桉树 降香黄檀 混交林 |
| DOI： |
| 投稿时间：2015-10-12 |
| 基金项目:国家自然科学基金项目(31460121),国家科技支撑计划项目(2011BAC09B02,2012BAD22B01)和广西重大专项计划项目(1222005)资助。 |
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| Effects of Herbicide Applications on Plant Functional Groups in Mixed Eucalyptus×Dalbergia odorifera Plantations in Subtropical China |
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WEN Yuan-guang1, YANG Liu1, ZHU Hong-guang1, CAI Dao-xiong2, YOU Ye-ming1, JIA Hong-yan2, ZHOU Xiao-guo1, YAN Li1
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| (1.State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Forestry College of Guangxi University, Nanning, Guangxi, 530004, China;2.Experiment Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang, Guangxi, 532600, China) |
| Abstract: |
| [Objective] The effects of herbicide (glyphosate) applications to plant functional groups (PFGs) were studied in mixed Eucalyptus×Dalbergia odorifera plantations under burning and unburning sites.[Methods] The plant community composition and PFGs response to herbicide application were estimated through the experiments of burning and herbicide (BH), unburning and herbicide (UBH), and the control of unburning and unherbicide(CK).[Results] Compared with the control, the constant species, especialy rare species in the plant community differed markedly between treatments after two-year herbicide application, although understory plant community had a high coeffecient of similarity (Jaccard index is more than over 0.7).The constant species of the UBH was higher 37.50% and 57.14% than that of BH and CK, respectively.In contrast, rare species of the community was increased from 2 species in UBH to 24 species in BH and 7 species in CK, respectively.This result indicated that BH promoted the development of rare species, whereas UBH promoted the development of constant species.The BH increased species richness of grass and legume PFGs, while the UBH decreased species richness of vines and woody PFGs.However, only species richness of woody PFGs had significant difference (P<0.05) between treatments.BH decreased the relative abundance (RA) and relative coverage (RC) of forbs, grasses and legumes PFGs, and significantly decreased the RA and RC of ferns PFGs but significantly increased the RC of woody PFGs.UBH decreased significantly the RC of woody PFGs.[Conclusion] This study clearly demonstrated that the effects of herbicide applications with low concentration and low frequency on understory PFGs are initial and short term. |
| Key words: plant functional group herbicide Eucalyptus Dalbergia odorifera mixture plantation |
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