滇东南岩溶山区4个树种的造林试验结果分析

Silviculture Experiment of Four Tree Species at Karst Mountainous Areas in Southeast Yunnan

通过在砚山县铳卡农场对圣诞树、滇合欢、新银合欢、刺槐 4个树种不同造林密度、施肥措施、苗根处理方式及苗期喷云大 - 12 0等 5个因素的对比试验 ,幼树期的结果表明 :树种对林木生长量及生物量的影响最大 ,施肥措施和苗根处理方式对林木的生长发育也具有一定的作用 ,而苗期喷云大 - 12 0对定植后林木的生长发育作用不明显 ,密度效应除圣诞树外其他 3个树种还不显著。参试的 4个树种中 ,圣诞树 3年生时已经郁闭 ,其最佳技术组合A1B1C1D1E1的树高、地径、冠幅和单株生物量分别为 5 0 5m、 4 72cm、 1 79m和 7 0 5kg ,每公顷可提供薪材2 2 6 78kg、绿肥和饲料 2 434 5 5kg,产值 34 85 0 8元 ;滇合欢的最佳技术组合A2 B1C2 D2 E1的树高、地径、冠幅和单株生物量分别为 1 84m、 4 33cm、 1 2 3m和 1 2 6kg ,每公顷可产薪材 6 936 8kg、绿肥和饲料 146 7 4kg ,产值 76 7 0 5元 ;新银合欢则不太适应试区的气候 ,每年都受霜冻的危害。预计在滇东南岩溶山区选择多用途的圣诞树和滇合欢 ,采用最佳的技术措施组合造林 ,能取得良好的生态效益和经济效益。

Silviculture contrast test including five factors,namely,species (Acacia dealbata,Albizia mollis,Leucaena leucocephala and Robinia pseudoacacia),planting density,fertilization,methods of treating roots of seedlings and spraying YUNDA-120 at seedling stage was carried out at Chongka farm of Yanshan county,Yunnan The growth condition in sapling stage indicated that among the five factors studied,the influence of different species on growth increment and biomass was the biggest Fertilization and different treatments on roots of seedlings affected the growth of saplings also,while the effect of YUNDA-120 was not obvious Planting density significantly influenced Acacia dealbata only,while the influences on the other three species were not significant The test Acacia dealbata plantation closed three years after planting,the height,ground diameter,crown width and individual increment of the best technical combination (A 1B 1C 1D 1E 1) were 5 05m,4 72cm,1 79m and 7 05kg respectively,the yield per hm 2 was 22 678kg of fuel wood,24 345 5kg of green manure and forage,and with the production value of 3 485 08 RMB yuan For Albizia mollis,the height,ground diameter,crown width and individual increment of the best technical combination (A 2B 1C 2D 2E 1) were 1 84m,4 33cm,1 23m and 1 26kg respectively,the yield per hm 2 was 6 936 8kg of fuel wood,1 467 4kg of green manure and forage,and with the production value of 767 05 RMB yuan Leucaena leucocephala did not adapt to the climatic condition of test area,and damaged by frost every year The results of the silviculture test indicated that ecological and economic benefits could be attained by siliviculture at karst mountainous areas in Southeast Yunnan by using the best technical combination of two multipurpose species,Acacia dealbata and Albizia mollis