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| Effects of the Residues of Cuscuta campestris and Mikania micrantha on Subsequent Plant Germination and Early Growth |
| LI Feng-lan, LI Ming-guang, ZAN Qi-jie, GUO Qiang, ZHANG Wei-yin, WU Zhi, WANG Yong-jun |
1.State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou 510275, P.R.China
2.Futian-CityU Mangrove Research & Development Centre, Shenzhen 518040, P.R.China
3.The Shenzhen Wild Animal Rescue Center, Shenzhen 518000, P.R.China
4.Office of Greening Committee of Shenzhen City, Shenzhen 518048, P.R.China
5.Laboratory of Forest Ecology and Environment, State Forestry Administration, Beijing 100714, P.R.China
6.Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, P.R.China
7.Guangdong Neilingding-Futian National Nature Reserve, Shenzhen 518040, P.R.China |
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摘要 Cuscuta campestris, a dodder, can parasitize and suppress a scrambling herbaceous to semi-woody perennial vine, Mikania micrantha, one of the most destructive weeds in the world. To assess the effects of the mixed residue of C. campestris and M. micrantha on the subsequent plant community, we conducted a one-year experiment on the germination and seedling growth of subsequent plant community after the application of C. campestris. Seven treatments of varying proportions of C. campestris and M. micrantha residue on 21 subject trees and shrubs, which were commonly found in South China, resulted in a germination rate of 35.3% for all 8715 seeds from 18 species, ranging from 5.7 to 81.9%; the remaining 3 species failed to germinate. ANOVA analysis showed that the residue did not affect the germination, growth, or mortality of the trees and shrubs. The germinated C. campestris seeds from the residue coiled the seedlings of most of the species, but less than 4% host death caused by C. campestris. In addition, the residue did not affect the germination of the herbaceous seedlings originating from the loam, and the similarity coefficients of the germinated seedlings between the treatments were very high. These results suggested that the residue had no negative impact on the germination and early seedling stages of the tree, shrub and grass species of the subsequent plant community. The use of C. campestris residue had a positive effect on the growth of M. micrantha, but it did not change the trend of M. micrantha being suppressed because re-parasitization occurred soon after the growth restarted. No negative effect was detected on the other species as a result of the parasitization of C. campestris or by the use of the mixed residue. This suggests that C. campestris is likely to be an effective and promising ecologically safe native herbaceous agent for controlling M. micrantha.
Abstract Cuscuta campestris, a dodder, can parasitize and suppress a scrambling herbaceous to semi-woody perennial vine, Mikania micrantha, one of the most destructive weeds in the world. To assess the effects of the mixed residue of C. campestris and M. micrantha on the subsequent plant community, we conducted a one-year experiment on the germination and seedling growth of subsequent plant community after the application of C. campestris. Seven treatments of varying proportions of C. campestris and M. micrantha residue on 21 subject trees and shrubs, which were commonly found in South China, resulted in a germination rate of 35.3% for all 8715 seeds from 18 species, ranging from 5.7 to 81.9%; the remaining 3 species failed to germinate. ANOVA analysis showed that the residue did not affect the germination, growth, or mortality of the trees and shrubs. The germinated C. campestris seeds from the residue coiled the seedlings of most of the species, but less than 4% host death caused by C. campestris. In addition, the residue did not affect the germination of the herbaceous seedlings originating from the loam, and the similarity coefficients of the germinated seedlings between the treatments were very high. These results suggested that the residue had no negative impact on the germination and early seedling stages of the tree, shrub and grass species of the subsequent plant community. The use of C. campestris residue had a positive effect on the growth of M. micrantha, but it did not change the trend of M. micrantha being suppressed because re-parasitization occurred soon after the growth restarted. No negative effect was detected on the other species as a result of the parasitization of C. campestris or by the use of the mixed residue. This suggests that C. campestris is likely to be an effective and promising ecologically safe native herbaceous agent for controlling M. micrantha.
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Received: 19 January 2012
Accepted:
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| Fund: This research was supported by the National Natural Science Foundation of China (30370243); the Science and Technology Department of Shenzhen, China (2007 No.5); the Foundation of Human Settlements and Environment Commission of Shenzhen Municipality (2009); the Foundation of Chinese Academy of Forestry (2002ZD01 (2003)) and the Special Fund for Agro-Scientific Research in the Public Interest, China (201103027). |
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Corresponding Authors:
Correspondence LI Ming-guang, Mobile: 13725378022, Fax: +86-20-84110436, E-mail: lsslmg@mail.sysu.edu.cn
E-mail: lsslmg@mail.sysu.edu.cn
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| About author: LI Feng-lan, E-mail: lanzi_79@126.com; |
Cite this article:
LI Feng-lan, LI Ming-guang, ZAN Qi-jie, GUO Qiang, ZHANG Wei-yin, WU Zhi, WANG Yong-jun.
2012.
Effects of the Residues of Cuscuta campestris and Mikania micrantha on Subsequent Plant Germination and Early Growth. Journal of Integrative Agriculture, 12(11): 1852-1860.
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