论文部分内容阅读
桃原产我国,是栽培很广的果树之一。北京地区桃与苹果、梨、葡萄并列为四大鲜果,在市场和加工原料供应方面都占有重要地位。但目前供生产利用的优良品种多为中熟种,而早、晚熟品种很少,且品质差。据统计,全市鲜桃年产量3,000多万斤,早、晚熟品种仅占三分之一,中熟品种占三分之二,多集中在七月下旬至八月上旬上市,供应期
Peach origin of our country, is one of the cultivated fruit trees. Peaches and apples, pears and grapes in Beijing are ranked as the four major fresh fruits and occupy an important position in the market and the processing of raw materials. However, most of the fine varieties used for production and utilization are medium-mature varieties, while the varieties of early-maturing and late-maturing varieties are few and the quality is poor. According to statistics, the city’s peach annual output of more than 3,000 kilograms, early and late varieties only account for one-third, medium-maturing varieties account for two-thirds, and more concentrated in late July to early August listing, supply period