| 绵阳市区梨园杂草调查 |
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| 引用本文： | 曾涛,高浩,唐海,杨丽红.绵阳市区梨园杂草调查[J].绵阳师范高等专科学校学报,2014(8):69-74. |
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| 作者姓名： | 曾涛 高浩 唐海 杨丽红 |
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| 作者单位： | 绵阳师范学院生命科学与技术学院,四川绵阳621006 |
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| 基金项目： | 四川省教育厅项目（12ZA078）;绵阳师范学院项目（2012A15;QD2013A06） |
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| 摘 要： | 采用倒置“W”九点取样法,对四川省绵阳市区梨园杂草种类及其群落结构进行了调查,并进行物种多样性分析.结果表明绵阳市区梨园杂草有20科43种,其中禾本科杂草11种,占总种数的25.58%,菊科杂草5种,占11.63%,苋科及大戟科杂草分别4种,各占9.3%,其他杂草共19种,占44.19%;相对多度达10以上的杂草有虮子草、喜旱莲子草、酢浆草、饭包草、狗尾草、铁苋菜、光头稗、鸭跖草、无瓣蔊菜共9种,为该地区梨园主要杂草;其中虮子草和喜旱莲子草的相对多度分别达37.55和30.94,为当地梨园的优势杂草.绵阳市区梨园杂草群落物种多样性分析结果表明,绵阳东北区和绵阳西南区的梨园杂草群落多样性指数、丰富度指数及均匀度指数均高于绵阳西北区和绵阳东南区,而辛普森指数却相反.相似性分析结果表明,绵阳西南区和绵阳东南区的梨园杂草群落相似性指数最高,达0.619;绵阳西北区和绵阳东北区的梨园杂草群落结构差异较大,相似性指数最低,为0.34.
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| 关 键 词： | 果园 杂草调查 相对多度 倒置“W”九点取样法 |
Weed Survey in Pear Gardens in Mianyang |
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| ZENG Tao,GAO Hao,TANG hai,YANG Li-hong.Weed Survey in Pear Gardens in Mianyang[J].Journal of Mianyang Teachers College,2014(8):69-74. |
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| Authors: | ZENG Tao GAO Hao TANG hai YANG Li-hong |
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| Institution: | (College of Life Science and Biotechnology, Mianyang Normal University, Mianyang, Sichuan 621006) |
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| Abstract: | Weed species in pear gardens was investigated using inverted W-pattern sampling method in Mi-anyang,Sichuan Province. The composition of weed species,dominant species and the community structure were determined in this area. The results showed that 43 weed species,belonging to 20 families were recorded. Among these weeds,Gramineae weeds 11 species accounted for 25. 58%;Asteraceae weeds 5 species accounted for 11. 63%;Amaranthaceae weeds and Euphorbiaceae weeds 4 species accounted for 9 . 3%,Respectively;other weeds 19 species in total,accounted for 44. 19%. According to RA（ relative abundance）,Leptochloa panicea,Alter-nanthera philoxeroides,Oxalis corniculata,Commelina benghalensis,Setaria viridis,Acalypha australis,Echinoch-loa colonum,Commelina communis and Rorippa dubia were the main weeds in pear gardens in this area. All in all,Leptochloa panicea and Alternanthera philoxeroides were the dominant weed species in pear gardens in Mian-yang,because of their RA as high as 37. 55 and 30. 94,respectively. And the diversity analysis displayed that the species richness index,Shannon-Wiener index and pielou index of the weeds in pear gardens in the northeast and southwest of Mianyang were higher than those in the northwest and southeast,but the Simpson index was re-verse. Similarity of weed community structure between the southwest and southeast pear gardens was very close,of which the similarity index was as high as 0 . 619;while the similarity index was as low as 0 . 34 between northwest and northeast regions in Mianyang. |
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| Keywords: | orchard weed survey relative abundance inverted W-pattern |
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