承德县试点落叶松种和种源选择试验八年结果

本文报道了在河北省承德县所进行的落叶松属种和种源选择研究的结果。该试验用同一批材料在两种立地上造林,八年的数据表明,在供试的五种落叶松中,日本落叶松的生长优于其它几种。各种落叶松在生长力、物候期方面均表现有种内的种源间差异,但这些差异并无地理规律性,与国外报道的落叶松属种内遗传变异模式相类似。

THE EIGHT YEAR RESULT FROM A SPECIES AND PROVENANCE TEST OF LARCH

This paper deals with the results of a provenance trial of larch (Larix) at the age of eight. In this trial, larix gmelini (Rupr.) Rupr. of 4 provenances, Larix olgensis Henry of 6 provenances, larix sibirica Led. of 2 provenances, larix principis-rupprechtii Mayr of 9 provenances, and larix leptolepis (Sieb. et Zuce.) Gord. of 7 secondary provenances were involved. The analysis of variance suggested that the difference among and within species are high for many characters studied, i. e. height at age 2, 8, survival at age 3 and 8, and phenological phases. Geographic variables of the seed sources, e. g. latitude and longitude were not related to those characters mentioned above, i. e. the genetic variation pattern of larch appeared to be random. Japanese larch had a height advantage over the other four species up to age 8. Auto-correlations of height growth among species and among provenances of each species at different ages are large enough to encourage the use of early results to predict future performances. The high correlation coefficent (r=0.998 5**) of tree height between two planting sites established with same seedlots in this provenance test showed that the experimental results were reliable.