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地处成都东面的龙泉山，是国内著名的水蜜桃生产基地。近年来．这里种植的桃、李，特别是中热桃，在早春因受持续低温阴雨的影响，落花落果严重，部分壮年树出现了连年欠收或绝收现象，果农迫切需要一种经济简便的保果技术．常用的喷施法和市售的各种保果药必须选择良好的气候
Longquan Mountain is located in the east of Chengdu, is the famous peach production base. In recent years. The peach and plum cultivated here, especially the middle-hot peaches, were severely damaged in the early spring due to continuous low temperature and rainy weather. Some of the prime-time trees appeared in successive years due to the phenomenon of under-payment or over-harvesting. The peasants urgently needed a simple and economical fruit-preserving technology . Commonly used spray method and commercially available variety of medicinal herbs must choose a good climate