果树保护地栽培进展与展望沈元月贾克功祝军（莱阳农学院园艺系，山东莱阳２６５２００）（中国农业大学保护地农业是一种人类强烈干预自然生态环境的农业生态系统，是农业发展史上一场革命。随着果树矮化密植栽培的发展和化学调控技术、设施材料的进步，随着改革开放、... Advances and Prospects of Cultivation of Fruit Trees in Protected Field  Shen Yuanyue, Jia Ke, Zhu Zhujun (Department of Horticulture, Laiyang Agricultural College, Laiyang 265200, Shandong, China) Protected agriculture is a kind of agro-ecological system with human intervention in natural environment. It is a history of agricultural development Revolution. With the development of fruit trees dwarf dense planting cultivation and chemical control technology, facilities, materials, progress, with the reform and opening up, ...