Abstract: A long-term investigation has been made on inter-planting effects of 3 types of densities regarding tree-grass combination on the saline-alkaline soil irrigated with sewage from sewage treatment plants of the petroleum industry.Both tree species and grass species suitable for long-term inter -planting have been screened.In addition,based on analysis and evaluation of densities(spacing between rows and individuals),models and effects of long-term inter-planting of trees and grasses,the optimal inter-planting density and mode have been suggested.At the same time,effects for extending inter-planting of trees and grasses on 3 different types of soil were analyzed and summarized.

摘要： 对在盐碱地上利用处理后石油工业污水灌溉进行林草间作，对三种不同密度配置的间作效果进行了长期的调查研究，对林草长期间作的树种、草种提供了优选结果；对林草长期间作的密度(株行距)、间作方式与效果进行了多方面的分析评价，提出了三种密度中最佳间作密度与方式：对在三种不同土壤类型上开展林草间作的推广效果进行了分析总结。