化学疏花疏果剂在苹果、梨树上的应用张军科朱延庆李嘉瑞（西北农业大学园艺系陕西杨陵７１２１００）疏花疏果是有效地节约树体养分而达到优质、稳产、壮树的措施。有人工方法和化学方法两种［１］。人工疏花疏果费工，往往疏除不及时，达不到疏除效果［２］。而用药剂疏... Application of Chemical Thinning Agent on Apple and Pear Trees ZHANG Junke, ZHU Yanqing, LI Jiarui (Department of Horticulture, Northwest Agricultural University, Yangling, Shaanxi 712100, China) Thinning and thinning is an effective measure to save tree’s nutrients and achieve high quality, stable yield and strong tree growth. There are two artificial methods and chemical methods [1]. Manual flower thinning fruit filling, often sparse in time, can not achieve the effect of alienation [2]. And medication sparse ...