红富士苹果套袋技术研究

通过２ａ的试验，研究出红富士苹果的套袋栽培技术：增施磷钾肥、控制枝量、在５月下旬至６月上旬（花后４０～５０ｄ）套双层袋、采收前１个月去外袋、４～７ｄ后去内袋、去袋时间以袋内温度升至最高时为宜。红富士苹果套袋后，果皮细腻、光洁指数高、底色淡黄、全红果比率高、着色鲜艳、农药残留量低、外观品质好，病虫果率低。

A Study on Bagging Techniques of Red Fuji Apple Fruits

The abgging techniques of Red of Fuji apple fruits was studied from 1994 to 1995. By increasing the norms of phosphoric and potassic fortilizer and controlling the quantity of apple shoots, the bagging fruit of appearance quility of Red Fuji apple fruits had been improved efficiently. The results showed that the best period of bagging two layers fruit bags was from 40 to 50 days after full bloom. The outer layer of fruit bag should be removed a month be for the picking stage, and the inner layer should be remained from 4 to 7 days after the remoing of the outer layer. The suitable time which the bag was removed in a day was when the temperature in the bag reached the highest level. By bagging fruit bags, Red Fuji fruits became delicate, bright-coloured and light yellow bottom. The rate of full red fruit was much higher and that of deseased fruits waslow. The residue of farm chemical in the fruit was less.