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通过速生抗虫株的直接选择利用 ,选育出速生抗虫的开天 13无性系 ,块状造林 5年生主梢累计受害率 4 6.9% ,比对照降低 2 5 .7% ,10年生立木蓄积量 197.0m3/hm2 ,比对照增产 72 .8%。通过速生抗虫无性系与速生、无病虫害优株杂交 ,选育出抗虫速生无性系开天F13×那 1～ 1,单行小区造林 5年生主梢累计受害率 2 0 .0 % ,比对照下降 60 .0 % ,7年生平均单株材积 0 .0 665m3,比对照增加 72 .7%。
Through the direct selection and utilization of fast-growing pest-resistant strains, the fast-growing insect-resistant open-root clones were bred. The cumulative damage rate of 5-year-old main shoots was 4 6.9%, 25.7% The amount of 197.0m3 / hm2, yield 72.8% more than the control. Through fast-growing insect-resistant clones and fast-growing, pest-free hybrids, breeding fast-growing insect-resistant clones F13 × that 1 to 1, single-lane afforestation 5-year-old main shoot cumulative damage rate of 20.0% Decreased by 60.0%. The average annual volume per plant of 7-year-old was 0.6665m3, an increase of 72.7% compared with the control.