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采用42个杉木家系,在我省5个有代表性的立地造林,7年生时进行了生长情况分析,结果表明:立地间生长差异极显著,方差分量占39.46%;地点×家系间交互效应达极显著水平。采用 Eberhart 和 Russell 法计算回归系数和离回归方差的 S_d~2值,根据生长稳定性与材积生长量分析,42个家系可分为4种类型:(1)不稳定速生型,占23.81%,单株材积比对照大57.25%;(2)基本稳定速生型,占16.67%,材积生长比对照大49.80%;(3)慢生型,占40.47%;(4)其他型,占19.05%。地点效应的回归系数 b>1的家系,在良好立地中,生长得更好;而 b<1的家系,在良好的环境中,生长不太好,但在不良环境中反而比 b>1的家系,生长表现较好。
42 Chinese fir families were used to analyze the growth of the five typical sites in our province. The results showed that the difference of growth was significant with the variance component accounting for 39.46% of the total. The interaction effect between sites and families Very significant level. According to the analysis of growth stability and volume growth, 42 families can be divided into 4 types according to Eberhart and Russell method: (1) unstable fast-growing type, accounting for 23.81% The volume of single plant was 57.25% larger than that of the control. (2) The stable type was stable, accounting for 16.67%. The volumetric growth was 49.80% larger than the control. (3) The slow-growing type accounted for 40.47%. Families with b> 1 locus effect grew better in good habitat; while those with b <1 did not grow well in good environment but worse in adverse environment than those with b> 1 Family, growth performance is better.