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杨树人工林,在我国有悠久的栽培历史,长期以来,广大群众在栽培速生丰产林生产实践中,积累了一套林粮、林草间作的经验;但是在沙地上杨树丰产幼林中间种牧草研究甚少,本着以短养长的精神,探讨间种的生态效益是有必要的,于1986—1687年间,在彰武县兴隆堡乡沙地杨树速生丰产林中,进行了间种牧草试验。初步看到,在同一块林地上,同时或不同时出现两种或两种以上的植物群落,
Poplar plantations have a long history of cultivation in our country. For a long period of time, the majority of the masses have accumulated a set of experience in forest and grass production in the practice of planting fast-growing and high-yield forests. However, It is necessary to study the ecological benefits of intercropping in the spirit of shortening cultivation. During the period from 1986 to 1687, in the quick-growing high-yield forest of poplar in sandy land of Xinglongpu Township, Zhangwu County, Forage test. Preliminary findings show that in the same piece of woodland, with or without two or more two kinds of plant communities,