元谋干热河谷引种造林试验及树种选择研究

在较典型的金沙江干热河谷元谋龙川江河谷引进赤桉、柠檬桉、窿缘桉、大叶相思、马占相思、厚英相思、肯氏相思、台湾相思、绢毛相思、银合欢、苏门答腊金合欢等树种,以本地的山合欢、山黄麻作对照进行造林试验,结果表明：赤桉、厚英相思、柠檬桉、窿缘桉、肯氏相思、大叶相思等都比山合欢长势好。用定量的标准（生长量的数量指标）选择造林树种,选出的树种较符合元谋的实际,在元谋生长良好,选择方法简单,且精度高,可供应用。

A Study on Species Introductionin Xerothermic Valley in Yuanmou, Yunnan

To meet the needs of afforestation in particular natural conditions in Yuanmou's xerothermic valleys, the quantitative selection research of drought-resistant and heat-resistant afforestation species was carried out. Eucalyptus camaldulensis, E.citriodora,E.exserta var. farvula,Acacia acuriculaeformis,A.mangium,A.crassicarpa,A.cunningharmii A.richii, A.cicinata,Leucaena leucocephala, A.suma Buch.tham.ex Wall. Albizia kalkora,Trema orientalis.were selected as test species, the growth of height,diameter and crown mean width were analysed 3 years after afforestation. Based on the relevant data, the selection criterion to select drought-resistant and heat-resistant affrestation species in Yuanmou's xerothermic valleys was worked out, and the quantitative selection criterion was 3.4325. Conversly, using this criterion to test those test species,Eucalyptus camaldulensis, Acacia crassicarpa, E.citriodora, E.exserta var.farvula ,A.cunningharmii, A.acuriculaeformis were selected as afforestation species of Yuanmou's xerothermic valleys. The analysis results of height and diameter growth of test species, the method to select drought-resistant and heat-resistant afforestation species were introduced in details in this paper.