论文部分内容阅读
截至去年延庆县杏树栽培总面积已达10万亩,仁用杏树已成为全县果树主要的支柱产业,每年总产量达2700吨,经济收入达1672万元。2007年3月3日夜间到4日上午,延庆有强雨加雪,雨雪后大风降温,当时树上形成一层冰挂,由于前期的高温现象,此时个别地区杏花芽已开始活动,突然的降温,使空气温
As of last year, the total area of apricot cultivation in Yanqing County has reached 100,000 mu. The apricot tree has become the main pillar industry of fruit trees in the county. The annual output is 2,700 tons and the economic income reaches 16.72 million yuan. On the night of March 3, 2007, on the morning of the 4th, there was heavy rain and snow in Yanqing, and the gale was cool after rain and snow. At that time, a layer of ice-hanging was formed on the tree. Due to the high temperature in the early stage, apricot flower buds had started to move in some areas. Suddenly cool down and make the air warm