疏伐和施肥对福建柏马尾松混交林效应研究

适当疏伐有助于使混交林种间关系向有利方向发展 ,不同混交林类型对疏伐措施的反应不尽相同。福建柏为上层木、中层木的混交林经疏伐 ,对主林木树高、胸径和材积生长均有显著的促进作用 ,前者保持着强度疏伐 >全伐 >中度 >弱度 >对照的关系 ;后者则遵循弱度疏伐 >中度 >强度 >极强度 >对照的规律 ;福建柏为下层木的混交林 ,则不同疏伐处理强度对主林木树高、胸径、材积生长以及林分总蓄积量没有显著影响。适当的疏伐处理改善了林内的环境条件 ,为植物的侵入提供了可能性 ,同时也改变了原有的种群结构和数量 ,可以丰富混交林下的植物种类 ,增加混交林群落中的植物的多样性。福建柏 (下层木 )马尾松混交林经合理施肥有利于促进主林木生长 ,较佳的施肥量组合为 1hm2 施尿素 15 0kg、钙镁磷肥 30 0kg、氯化钾 10 0kg。

Studies on the Effects of Thinning and Fertilization on Fokienia hodginsii and Pinus massoniana Mixed Forests

The suitable thinning does help to making mixed forest interspecific relation develop in the advantageous direction.The reactions of various mixed forest types to the thinning countermeasures are less than same.The proper thinning treatments improve the environmental conditions inside forests and provide the possibility for plant incursion,meanwhile,they improve the original population structure and quality,too,they may enrich the plant species under mixed forests and increase the plant diversity in mixed forest communities.The reasonable fertilizer application is advantage to promoting the main Fokienia hedginsii(underwoods) and Pinus massoniana mixed forest tree growth.The comparatively favourable fertilization combination is 150kg of urea,300 kg of calcium magnesium phosphate fertilizer and 100 kg of potassium chloride per ha.