RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2008, Vol. 17 >> Issue (3): 468-468.

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ECOLOGICAL STUDY ON SEVERAL MANMADE FORESTS OF INTRODUCED SPECIES IN JINSHAJIANG DRYHOT VALLEY

LIU Fangyan1, LI Kun1, MA Jiangming1,2   

  • Received:1900-01-01 Revised:1900-01-01 Online:2008-05-20

Abstract:

By means of the standardtimber and the harvesting methods,biomass of the vegetation in different layers of some manmade forests of introduced species including 〖WTBX〗Ecucalyptus camaldulensisLeucaena leucocephala〖WTBZ〗 mixed forest,〖WTBX〗Ecucalyptus camaldulensis〖WTBZ〗 pure forest，〖WTBX〗Leucaena leucocephala〖WTBZ〗 pure forest,〖WTBX〗Azadirachta indica〖WTBZ〗 pure forest and natural secondary forest in the dryhot valley of Jinshajiang River,Yuanmou County,was comparatively studied.Species composition and plant diversity between manmade forests of introduced species and natural secondary forest have been compared too.The results showed that: (1)Manmade forests of introduced species in comparison with the natural secondary forest have larger biomass,and general biomass in different forests revealed 〖WTBX〗Ecucalyptus camaldulensisLeucaena leucocephala〖WTBZ〗 mixed forest（4491 t/hm2）>〖WTBX〗Leucaena leucocephala〖WTBZ〗 pure forest(3991 t/hm2)>〖WTBX〗Ecucalyptus camaldulensis〖WTBZ〗 pure forest（3857 t/hm2）>〖WTBX〗Azadirachta indica〖WTBZ〗 pure forest（1306 t/hm2）>natural secondary forest(935 t/hm2).Biomass in tree layers took up the most large parts of the manmade forests,and in natural secondary forest,shrub layer,herbaceous layer and litter layer were the main parts.(2)The number of species in manmade forest was fewer than in natural secondary forest,and it was different in the number of species and species composition in manmade forests.(3)The Shannonwiener diversity indexes and Margalef evenness indexes in forests showed 〖WTBX〗Azadirachta indica〖WTBZ〗 pure forest>natural secondary forest>〖WTBX〗Ecucalyptus camaldulensis〖WTBZ〗 pure forest>〖WTBX〗camaldulensisLeucaena leucocephala〖WTBZ〗 mixed forest>Leucaena leucocephala pure forest.There was no significant difference in Alatato evenness indexes among manmade forests, but it was different between manmade forests and natural secondary forest.〖

Key words: dryhot valley, introduced species, vegetation restoration, species diversity〖

[1] ZHANG Yi-ping, DUAN Ze-xin, DOU Jun-xia,. COMPARISON OF CLIMATE CHARACTERISTICS BETWEEN A DRYWARM VALLEY IN UPPER REACHES OF MIN RIVER AND A DRYHOT VALLEY OF YUANJIANG RIVER [J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2005, 14(1): 76-82.
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