干热河谷和干旱山地人工混播造林试验

干热河谷和干旱山地的人工混播造林试验，于１９９１～１９９２年在永胜大龙潭、猫猫山和水平水泄３个造林困难的地区进行。选用车桑子、山毛豆、银合欢、滇合欢、银荆、黑荆等树种进行人工混播造林试验。还分别进行了云南松与车桑子、银荆、黑荆、滇合欢、红木荷、金合欢的混播造林试验。经３、４年的试验，通过对各参试树种的种质评价，落种状况、出苗率、成苗率和各成苗期，苗木生长状况的观测。得出以车桑子、山毛豆、银合欢作为干热河谷和干旱山地的混播造林种较好。可在今后形成多树种，多层次的林分环境。

Experiments of Artincial Mixture Sowing Forestation in Dry and Hot Valley and Dry Mountain Area

The experiments of artificial mixture sowing forestation in dry and hot valley anddry mountain area have been done from 1991 to 1992 in Dalongtan,Maomao mountain ofYongsheng County and Shuixie of Yongping County.Some species such as Dodonaea viscosa,Tephrosia candida,Leucaena glauca,Albizia mollis,Acacia dealbata and Acacia mearnsii havebeen chosen for mixture sowing forestation experiments,the same experiment was donerespectively on Pinus yunnanensis and Dodonaea viscosa,A cacia dealbata,Acaciamearnsii A lbizia mollis, Schima wallichii and A cacia concinna.After 3 or 4 years,according tothe investigation on each species for the test in different aspects such as evaluation of geimplasm,seed state,seedling percent,planting percent and plant growth,the results showed thatthe better species for mixture sowing forestation in dry and hot valley and dry mountain areaare Dodonaea viscosa,Tephrosia candida and Leucaena glauca,Thus, a stand environment ofmultispecies and multilayer will be fonned in the future.