首页 | 本刊简介 | 编委会 | 投稿征稿 | 期刊订阅 | 下载中心 | English
 
   
  论文快速检索

请输入关键词

 

 

   
  信息公告
海外撷英栏目开通,欢迎投稿

热带亚热带植物学报网络开通

访问总次数
14371645
今日访问
3846
当前在线
0人
 
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 2489次   下载 1607 本文二维码信息
码上扫一扫!
分享到: 微信 更多
香根草属与狼尾草属植物对土壤线虫营养类群的影响?
邵元虎,夏汉平,周丽霞,林永标,赵灿灿,傅声雷
作者单位
邵元虎,夏汉平,周丽霞,林永标,赵灿灿,傅声雷*  
摘要:  对广州华南植物园香根草属泰国香根草(Vetiveria nemoralis)、普通香根草(V. zizanoides)的2个品种Sunshine和Karnataka以及狼尾草属象草(Pennisetum purpureum)、皇草(P. purpureum × P. thyphoides)和杂交狼尾草(P. americanum × P. purpureum)地下土壤线虫各食性类群在根区和非根区的分布特征进行了对比研究,结果表明:线虫的数量主要集中在0-15cm的浅层土壤中,在不同生境下食细菌和植物寄生线虫占优势,两类线虫所占的比例在香根草属植物生境下为87.7-97.6%,狼尾草属植物生境下为88.5-94.0%,而食真菌、捕食性和杂食性线虫数量则很少,其相应比例分别为2.4-12.3%和6.0-11.5%。两个属植物根区的线虫数量显著高于非根区,但不同营养类群的线虫在根区和非根区的分布有较大差异。香根草属植物和杂交狼尾草非根区植物寄生线虫所占的比例高于根区,而食细菌线虫所占的比例低于根区;但象草和皇草非根区植物寄生线虫所占的比例低于根区,而食细菌线虫所占的比例高于根区。除皇草外,两个属非根区食真菌线虫所占的比例一般高于根区。在所选的植物中,Karnataka和杂交狼尾草在土壤改良和土壤生物学效应方面有更好的潜力。。
关键词:  土壤线虫  营养类群  香根草  狼尾草  根区
DOI:10.3969/j.issn.1005-3395.2007.1.001
分类号:
基金项目:
Effects of Grasses of Vetiveria and Pennisetum on Trophic Groups of Soil Nematodes
SHAO Yuan-hu, XIA Han-ping, ZHOU Li-xia, LIN Yong-biao
Abstract:  Trophic groups of soil nematodes were investigated in the rhizosphere and non-rhizosphere of Vetiveria spp. and Pennisetum spp. in South China Botanical Garden. Soil nematodes were aggregated mainly in the soil layer of 0-15 cm regardless of the biomass and the length of roots of Vetiveria and Pennisetum,and the densities of bacterivores and phytophages were significantly higher than those of the other three trophic groups, fungivores, omnivores and predators in all habitats. The proportions of bacterivores and phytophages were in the range of 87.7-97.6% and 88.5%-94.0% and those of the other three trophic groups were 2.4%-12.3% and 6.0%-11.5% under grasses of Vetiveria spp. and Pennisetum spp., respectively. The total number of nematodes was much higher in the rhizosphere than in the non-rhizosphere of grasses of Vetiveria, but this was not so obvious under grasses of Pennisetum. The proportions of phytophages under Vetiveria and under hybrid Pennisetum (P. americanum × P. purpureum) were much higher in the non-rhizosphere than in the rhizosphere, while the proportions of bacterivores were much higher in the rhizosphere than in the non-rhizosphere. Nevertheless, the proportions of phytophages and bacterivores under king grass (P. purpureum × P. thyphoides) and elephant grass (P. purpureum) habitats were opposite to that under Vetiveria. The proportions of fungivores were higher in the non-rhizosphere than in the rhizosphere under both genera of Vetiveria and Pennisetum with the exception of king grass. Higher nematode densities were found under V. zizanoides var. Karnataka and hybrid Pennisetum, indicating that the two species have good potential for the improvement of soil fertility.
Key words:  Soil nematode  Trophic group  Vetiver grass  Pennisetum grass  Rhizosphere

Copyright 2007 版权所有 中国科学院华南植物园《热带亚热带植物学报》编辑部
地址: 广州市天河区兴科路723号 中国科学院华南植物园 《热带亚热带植物学报》编辑部 邮编:510650 电话: 86 (0)20-3725 2514  传真:86 (0)20-3725 2642 E-mail: jtsb@scib.ac.cn
本系统由北京勤云科技发展有限公司设计
京ICP备09084417号-2