泡桐毛竹混交林混交效果试验研究

对泡桐毛竹的混交试验表明：新造毛竹林同时套种泡桐，可以实现成功混交，而现有稳定毛竹林下套种泡桐，则混交套种不成功．混交林中，泡桐和毛竹根系分布层次有一定差异，对林地土壤中养分的空间利用也有不同，其地下空间具有较好的丰产基础．混交林对泡桐生长影响较小，但对毛竹新竹的影响很大，可促进毛竹胸径和竹高的生长，加速竹鞭扩展，加速毛竹及早郁闭．通过混交可使空间利用多元化，养分利用和归还多样化，丰富混交林中生物多样性，因而混交林具有较强的生态效益．

A Study on the Mixed Effect of the Mixed Paulownia fortunei-Phyllostachys heterocycla Plantation

Mixed test on Paulownia fortunei and Phyllostachys heterocycla forest showed that it was successful to interplant Paulownia fortunei while Phyllostachys heterocycla forest was planted newly but that it was unsuccessful to interplant Paulownia fortunei in existing stable Phyllostachys heterocycla forest stand.There was good high-yield base in underground place of the mixed Paulownia fortunei-Phyllostachys heterocycla Plantation while there was definite difference on distribution levels of root system and place utilization of soil nutrient between Paulownia fortunei and Phyllostachys heterocycla.Mixed forest affected Paulownia fortunei growth slightly while it affected new bamboo of Phyllostachys heterocycla greatly.Mixed forest can promote diameter growth and height growth of Phyllostachys heterocycla,speed up expansion of its rhizomes greatly and quicken its closing.Mixed forest is beneficial to the realization of pluralism of place utilization,diversification of nutrient utilization and return and enrichment of biological diversity so that the mixed forest has good ecological effect.The conclusion provided reference for Phyllostachys heterocycla forest stand construction of mixed forests in right modes.