| The community composition and biodiversity of weeds in conservati on tillage system in Qinghai Province |
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| DOI：10.7606/j.issn.1000-7601.2013.01.40 |
| Key Words: conservation tillage weed communities species diversity dominance community similarity |
| Author Name | Affiliation | | WEI Youhai | Institute of Plant Protection, Qinghai Academy of Agricultural and Forestry Sciences, Xining, 810016, China | | GUO Qingyun | Institute of Plant Protection, Qinghai Academy of Agricultural and Forestry Sciences, Xining, 810016, China | | GUO Liangzhi | Institute of Plant Protection, Qinghai Academy of Agricultural and Forestry Sciences, Xining, 810016, China | | WONG Hua | Institute of Plant Protection, Qinghai Academy of Agricultural and Forestry Sciences, Xining, 810016, China | | CHENG Liang | Institute of Plant Protection, Qinghai Academy of Agricultural and Forestry Sciences, Xining, 810016, China |
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| Abstract: |
| Weed survey was conducted by the method of inverte
d W-sampling to determine the composition of species and structure of weed comm
unities in conservation tillage system in Qinghai Province. The results showed t
hat there were 67 weed species belonging to 25 families in conservation tillage
fields. The predominant species were
Elsholtzia densa Benth,
Galium maborasense Masamune,
Avena fatua Linn,
Chenopodium album L.,
Sonchus arvensis Linn and
Cephalanoplos setosum (Willd.) Kitam. There were 5 species o
f regional predominant weeds, 17 common weeds and 39 general weeds. Weed communi
ties were dominated by
Galium maborasense Masamune +
Elsholtzia densa Be
nth +
Chenopodium album L. +
Avena fatua L. +
Cephalanoplos setosum
(Willd) Kitam +
Phragmites australis (Cav.) Trin. ex Steud +
Polygonum nepalense
Meisn in Huangzhong,
Setaria viridis (Linn.) Beauv +
Chenopodium album L.+
Polygonum aviculaye L. +
Avena fatua L. +
Convolvulus arvensis L. +
Polygonum oonvolvulus L． +
Cephalanoplos setosum (
Willd) Kitam in Minhe,
Avena fatua L. +
Galium maborasense Masamune +
Sonchus brachyotus DC. +
Cephalanoplos setosum (Willd) Kitam +
Leymus secalinus (Georgi) Tzvel +
Polygonum oonvolvulus L +
Elsholtzia densa Benth +
Polygonum aviculaye L.+
Euphorbia helioscopia Linn. in Ping’an,
Lepyrodiclis holosteoides +
Galium maborasense Masamune +
Avena fatua L.+
Polygonum oonvolvulus L. +
Sonchus brachyotus DC. +
Elsholtzia densa Benth in Hualong,
Avena fatua L.+
Galium maborasense Masamune +
Chenopodium album L.+
Cephalanoplos setosum (Willd) Kitam +
Equisetum arvense Linn. +
Elsholtzia densa Benth in Datong, and
Elsholtzia densa Benth +
Lepyrodiclis holosteoides Laxm. +
Chenopodium album L. +
Bromus tectorum Linn. +
Sonchus brachyotus DC. +
Daucus carota in Gangcha. The species richness, diversity an
d evenness degree of weed communities in conservation tillage fields of Huangzho
ng and Datong were higher than those of other regions, but the dominance index o
f these two regions was relatively low. The weed community structure of Huangzho
ng was similar to that of Datong. The difference of weed community composition i
n different conservation tillage systems might be caused by different geographic
al environments, climatic conditions and weed control measures. |
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