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利用4个种源的麻栎种子进行不同播种密度的育苗试验,对其苗期生长性状、生物量进行测定分析.结果表明,至9月中旬,重庆巫山种源的最适播种密度为10cm×20cm,其幼苗平均苗高为45.51cm,地径为5.48mm,根长为38.73cm,根粗为10.35 mm;重庆武隆种源的最适播种密度为15cm×20cm,其幼苗平均苗高为56.60cm,地径为6.27mm,根长为45.47cm,根粗为11.63 mm;贵州丹寨种源的最适播种密度为15cm×20cm,其幼苗平均苗高为55.29cm,地径为5.86mm,根长为40.21cm,根粗为10.67mm;四川通江种源的最适播种密度为10cm×20cm,其幼苗平均苗高为60.30cm,地径为6.23 mm,根长为37.40cm,根粗为13.08mm.方差分析表明:4个播种密度下,重庆巫山种源幼苗地径、根长、叶鲜质量、叶干质量存在极显著差异;重庆武隆种源苗高表现出极显著差异;贵州丹寨种源幼苗苗高、茎鲜质量和茎干质量存在极显著差异.主成分分析表明:不同种源不同密度幼苗间生长特性的差异性主要由生物量和地径决定的.筛选出10cm×20cm和15cm×20cm两个播种密度为最佳育苗密度,四川通江种源为优良种源.
Seedlings of Quercus acutissima with four provenances were used to study seedling growth at different sowing densities and their seedling growth traits and biomass were measured and analyzed.The results showed that the optimum planting density of Wushan provenance was 10cm × The average seedling height of seedlings was 45.51cm, the root diameter was 5.48mm, the root length was 38.73cm and the root diameter was 10.35 mm. The optimum sowing density of provenances in Wulong, Chongqing was 15cm × 20cm, 56.60cm, diameter of 6.27mm, root length of 45.47cm, root diameter of 11.63mm; Guizhou Danzai provenances sown density of 15cm × 20cm, the average seedling height of 55.29cm, diameter of 5.86mm , The root length of 40.21cm, the root diameter of 10.67mm; Sichuan Tongjiang provenances sown density of 10cm × 20cm, the average seedling height of 60.30cm, diameter 6.23 mm, root length of 37.40cm, root Roughness was 13.08mm.Analysis of variance showed that there was a significant difference in seedling diameter, root length, leaf fresh weight and leaf dry weight at seedling density of Wushan in Chongqing at 4 sowing densities. Seedling height of Wulong provenances in Chongqing showed extremely significant difference ; Guizhou Danzai seedling seedling height, stem fresh weight and stem quality there is a significant difference between the principal component analysis showed that: different provenances of different density The difference of seedling growth characteristics was mainly determined by biomass and soil diameter, and two seedling densities of 10cm × 20cm and 15cm × 20cm were selected as the best seedling density, and provenances of Tongjiang were excellent provenances.