滇东南岩溶山区4个针阔叶树种造林试验初报

通过在砚山县铳卡农场对墨西哥柏、郭芬柏、冲天柏和杜仲4个不同树种以及不同的造林密度、施肥措施、育苗措施与喷洒云大-120处理等5个因素的对比试验，其幼树期(3年生)的试验结果表明：树种对林木的生长量、生物量及造林保存率影响显著，其他因素对林木生长的影响被树种的影响所削弱。同一树种在其他不同处理间的差异较明显，参试的墨西哥柏、郭芬柏、冲天柏和杜仲的造林技术措施的最佳组合分别是A1B2C2D1E2、A2B2C2D2E1、A3B1C3D1E2和A4B1C4D2E2。3年生墨西哥柏最佳组合的树高为3．4m、地径4．8cm、冠幅1．09m，生物量为29．348t／hm^2；冲天柏最佳组合的树高为2．66m、地径3．88cm、冠幅0．74m、生物量为19．000t／hm^2；郭芬柏最佳组合的树高2．42m、地径3．73cm、冠幅0．87m、生物量为18．548t／hm^2。预计在滇东南岩溶山区选择墨西哥柏、冲天柏和郭芬柏，采用最佳技术措施组合造林，能取得良好的生态效益和一定的经济效益。

Preliminary Report on Silviculture Experiment of Four Species at Karst Mountainous Area of Southeast Yunnan

Comparative silviculture experiments of five factors such as different species including Cupressus lusitanica,C.goveiana,C.duclouxiana and Eucommia ulmoides, different planting density, different fertilizing treatment, different seedling raising measure and spraying with Yunda-120 plant growth regulator were carried out at Chongka farm of Yanshan county. The experimental results on three years old saplings showed that the species produced quite significant effect on increment, biomass and remaining ratio; other factors' influences on tree growth were weakened by species. For the same species, there was significant difference between treatments. The optimum treatment combination of tested species Cupressus lusitanica,C.goveiana,C.duclouxiana and Eucommia ulmoides was A_(1)B_(2)C_(2)D_(1)E_(2), A_(2)B_(1)C_(2)D_(2)E_(1), A_(3)B_(1)C_(3)D_(1)E_(2) and A_(4)B_(1)C_(4)D_(2)E_(2). For three years old Cupressus lusitanica, the tree height, DBH, crown width and biomass of the optimum combination were 3.4 m, 4.8 cm, 1.09 m and 29.348 t/hm~(2) respectively; that for C.duclouxiana were 2.66 m, 3.88 cm, 0.74 m and 19.000 t/hm~(2);that for C.goveiana were 2.42 m, 3.73 cm, 0.87 m and 18.548 t/hm~(2). It is estimated that choosing Cupressus lusitanica,C.goveiana and C.duclouxiana, adopting the optimum technical combination of each species, promising ecological benefit and economic benefit can be obtained.