论文部分内容阅读
分析了木麻黄基干林带不同郁闭度情况下套种木麻黄、湿地松及乌墨等树种效果、现有林带经间伐后套种相思类树种、湿地松、刚果12~# 桉及木麻黄优良无性系等材料生长适应性、低郁闭度基干林带林下更新木麻黄不同无性系生长效果,研究结果表明,林下套种树种木麻黄、湿地松保存率、生长量指标随林带郁闭度增大而下降。林带郁闭度低于0.3时,木麻黄、湿地松生长较为正常,乌墨在林下套种生长不良;郁闭度较大林带经间伐处理郁闭度调至0.2～0.3后套种相思、湿地松、刚果12~# 桉、木麻黄优良无性系等材料保存率高、生态适应性强,生长量以木麻黄优良无性系、刚果12~# 桉及厚荚相思表现突出;木麻黄无性系平_(10)、平_(20)、粤_(501)在低郁闭度林带下更新效果优于当地实生苗,木麻黄粤_(601)、粤_(701)、粤_(501)及木麻黄东_1、东_2 等无性系在低郁闭度林带下套种保存率高、生长量大、适应性较强。
The effects of interplanting Casuarina equisetifolia, Pinus elliottii and Viburnum mongolicum under different canopy density were analyzed. The existing species of Acacia species, Pinus elliottii and Pinus elliottii Eucalyptus and Casuarina equisetifolia, The results showed that the survival rate and growth index of Casuarina equisetifolia and Pinus elliottii under the canopy intercropping increased with the forest canopy density increasing decline. When the canopy density was lower than 0.3, the growth of Casuarina equisetifolia and Pinus elliottii was normal, and the growth of black ink was undergrowth in understory planting. After the canopy density was 0.2-0.3, , Congo 12 ~ # Eucalyptus, Casuarina superior clones and other materials, high conservation rate, ecological adaptability, growth with excellent clonal Casuarina, Congo 12 ~ # Eucalyptus and acacia acacia outstanding performance; (601), Yue_ (701), Yue_ (501), and Yue_ (501) in the low canopy density forest were better than those in the local seedlings, Casuarina east _1, east _2 and other clones in the low density canopy intercropping species conservation rate, growth, adaptability.