岩溶地区石漠化综合治理模式的试验研究

广西凌云和都安岩溶地区几种石漠化综合治理模式的试验研究一是林草模式,采用任豆加桂牧1号的混交方式,树高年平均生长量为2.77 m、胸径为2.10 cm。牧草种植当年即可采收,每年可采收5次,年平均产量150 t/hm2,产值达1.5万元/hm2。二是林果模式,采用任豆加山葡萄、肥牛树加澳洲坚果、香椿加大果枇杷的套种方式,任豆树高年平均生长量为2.74 m、胸径为2.14 cm。种植的山葡萄2005年初已开花并少量挂果,到第五年可进入丰产期。三是林竹模式,采用柚木加吊丝竹的套种方式,柚木树高年平均生长量为1.77 m、胸径为1.52 m,柚木林下套种的吊丝竹5 a达到丰产期。四是林药模式,采用香椿加金银花的套种方式,香椿混交示范林树高年平均生长量为1.72 m、胸径为1.36 m。3 a生单株鲜花产量可达0.5 kg,产值30元,亩产值达1 200元。四种综合治理模式均取得良好的生态恢复效果。

Experimental Research on Comprehensive Control Pattern of Rocky Desertification in Karst Regions

The experimental research on several comprehensive control patterns of rocky desertification in Lingyun and Du＇an karst region of Guangxi was introduced.The first one was forest-grass pattern,which adopted the mixed mode of Zenia insignis and Guimu No.1 grass.The annual average growth of tree height and the diameter at breast height were 2.77 m and 2.10 cm respectively.The grass could be harvested 5 times every year from the planting and its average annual output was 150 thm2,the value of which reached 15,000 yuanhm2.The second one was wood-fruit pattern,which adopted interplanting mode of Zenia insignis and Vitis amurensis,Cephalomappa sinensis and Macadamia ternifolia,as well as Toona sinensis and Eriobotrya japonica.The annual average growth of Zenia insignis was that the tree height increased by 2.74 m and the diameter at breast height increased by 2.14 cm respectively.The planted Vitis amurensis had flowered and yielded a small amount of fruit in early 2005,which would come into the high-yield period at the fifth year.The third one was wood-bamboo pattern,which adopted interplanting mode of Tectona grandis and D.minor.The annual average growth of Tectona grandis was that the tree height increased by 1.77 m and the diameter at breast height increased by 1.52 cm respectively and the D.minor would come into the high-yield period at the fifth year.The last one was wood-medicine pattern,which adopted interplanting way of Toona sinensis and Lonicera japonica.The annual average growth of Toona sinensis mixed forest was that the tree height increased by 1.72 m and the diameter at breast height increased by 1.36 cm respectively.The yield of a 3-year flower could reach 0.5 kg,which was worth 30 yuan and the output value per mu was 1 200 yuan.Good effect of ecological restoration was obtained with these four comprehensive control patterns.