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2010年8—11月和2011年8月,以秦岭南坡商洛地区近自然经营的不同间伐强度(30%、20%和10%)下的栓皮栎纯林为对象,分析了间伐4～5年后栓皮栎种子库的种子数量,实生苗的存活率和生长状况,及其与环境因子的关系.结果表明:与对照相比,间伐后第4年,间伐10%、20%和30%强度下种子库中的种子总数分别增加了2.0%、21.1%和34.8%,翌年1年生实生苗数量分别增加了28.5%、99.7%和122.2%;间伐5年后,间伐10%、20%和30%样地内实生苗的存活率分别提高了25.5%、235.7%和480.0%.间伐使林地的光照、温度、土壤水分和养分等环境因子发生变化,促进了各年龄段实生苗的高度、新梢生长量及叶面积指数的增长,且随间伐强度的增加,3项生长指标均增加.在郁闭度≥0.85的栓皮栎林,间伐强度30%(郁闭度保留0.6)最有利于栓皮栎种子萌芽和实生苗生长.
From August to November 2010 and August 2011, the Q. variabilis (Quercus variabilis) plantation near natural management in Shangluo area on the south slope of Qinling Mountains was used as the research object. The results showed that compared with the control, in the fourth year after thinning, 10%, 20% and 30% of thinning were observed in the seedlings of Quercus variabilis seed bank, the survival rate and growth status of seedlings, The total number of seeds in the seed bank increased by 2.0%, 21.1% and 34.8%, respectively, while the number of 1-year-old seedlings increased by 28.5%, 99.7% and 122.2%, respectively; The survival rate of seedlings in 30% plots increased by 25.5%, 235.7% and 480.0%, respectively. The thinning changed the environmental factors such as light, temperature, soil moisture and nutrients, and promoted the height of seedlings in all ages. Shoot growth and leaf area index increased with the increase of thinning intensity, and all three growth indexes increased.In the Quercus variabilis forest with the canopy closure degree of 0.85, the thinning intensity of 30% (the crown retention of 0.6) was the most favorable to the cork Quercus seed germination and seedling growth.