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本文以湖南省九个杉木主要产区县的60余株树干纵向解析木为材料,进行生长量的相关分析。结果表明:(1)杉木速生性早期预测是可能的。8—4年生与20年生直径与树高的相关系数可达α=0.01和×=0.001的显著水平;(2)在生长早期按树高为20%的选择差选择,到20年生时仍保持10%左右效益。如树高按50%、直径按20%以上的选择差选择,到20年生时,树高和直径均保持20%左右效益,材积可获得50%以上效益;(3)不同的立地条件及产区,对杉木的速生性早期预测有着明显影响,在进行早期预测时,必须注意这些特点。
In this paper, more than 60 trunk trees in the main producing areas of nine fir trees in Hunan Province were used to analyze the growth of the trees. The results showed that: (1) Early prediction of fast-growing Chinese fir is possible. The correlation coefficient between diameter and tree height of 8-year-old and 20-year-old can reach the significant level of α = 0.01 and × = 0.001. (2) In the early growing season, the selection difference is 20% About 10% benefit. If the height of the tree is 50% and the diameter is more than 20%, the tree height and diameter will keep about 20% benefit at 20 years of age, and the volume will get more than 50% benefit; (3) Different site conditions and production The area has a significant impact on the fast-growing early prediction of Chinese fir, which must be paid attention to in the early prediction.