我场园艺队1967年种植的200亩甜橙和45亩大红柑,由于前期忽视树冠管理,封行后又不及时压顶和疏截,造成投产不几年,树冠就陆续封行,枝条互相交叉重叠,中、下层枝条因郁闭而逐年枯死,病虫发生严重,结果产量连年急剧下降,200 I field horticultural team planted in 1967, 200 acres of sweet orange and 45 acres of red citrus, due to neglect crown management early, after the closure of the line is not timely pressure top and sparse, resulting in a few years into production, the canopy gradually seal line, branches cross each other Overlapping, middle and lower branches due to canopy died each year, pests and diseases seriously, resulting in a sharp decline in production over the years, 200