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本文对两次杉木全分布区种源试验各点试验林的生长、发育、适应性等进行分析,评定种源优劣与环境互作。研究表明:杉木种源间存在极显著差异,第一次试验各试点20个参试种源11年生材积前三名平均生产量为后三名的152%—183%;第二次试验各点造林64个种源8年生材积前十名平均生长量为后十名的191%—223%。材积最大种源为最小种源的2—4倍。本省种源也优劣悬殊,我省不同地区种源选择增产效果为0—59%。根据生长量、开花结实状况、稳定性,树皮厚度、侧枝粗度、bi 值等指标综合评定,为我省不同地区选择了一批优良种源并提出了种、条调拨意见。
In this paper, we analyzed the growth, development and adaptability of the test forests under the provenance test of two fir distribution areas, and evaluated the advantages and disadvantages of provenances and environment interaction. The results showed that there were extremely significant differences among the provenances of Cunninghamia lanceolata. The average production of the top three of the 11-year-old product of 20 pilot provenances in the first experiment was 152% -183% of that of the latter three. In the second test, Afforestation 64 species of 8-year-old product volume of the top ten average growth of the top ten 191% -223%. The largest provenance is 2-4 times of the smallest provenance. The provenance of the province also has its own advantages and disadvantages. The yield-increasing effect of provenances in different areas in our province is 0-59%. Based on the comprehensive assessment of growth, flowering and fruiting status, stability, bark thickness, collateral thickness, bi value and other indicators, a number of excellent provenances were selected for different regions in our province and species and items were put forward.