在防护林带的研究工作中,当前和今后都直接与两个非常迫切的中心课题相关联:一是如何保证农业稳定高产,以满足人类对粮食及其它食物的需要;二是如何保持与改善环境的质量,这点在工业发达的国家尤为突出,因为大气、土壤、水源等的污染,以及人口过度集中与工、农业 In the study of shelter belt, current and future are directly related to two very urgent central issues: First, how to ensure stable and high-yielding agriculture to meet human needs for food and other foods; second is how to maintain and improve the environment This is especially true in industrialized countries where pollution of the atmosphere, soil, water, etc., as well as over-concentration of population and labor, agriculture