为探索椪柑防冻丰产早收益,衢州市下郑公社彭川大队柑桔专业队,在有关科技人员的具体指导下,于1978年3月底,在不毛之地的黄土丘陵上,采用全园深翻改土法,种植了一年生自育嫁接椪柑564株(折亩栽509株)。经过一年多的精心培育,1979年秋实收椪柑2453斤,折亩产2210斤。1980年春遇-8.7℃的低温霜冻,大部分嫁接椪柑重截整 In order to explore the antifreeze crop yields early gains, Quzhou City, under the commune Pengchuan Brigade citrus team, under the specific guidance of the relevant scientific and technical personnel, at the end of March 1978, in the loess plateau, using the whole garden deep plowing Soil Law, planted an annual self-grafting Poncirus 564 (fold planted 509 acres). After more than a year of meticulous cultivation, in the autumn of 1979, the actual harvest of ponkan 2453 pounds, fold 2200 pounds per mu. In the spring of 1980, it encountered a low temperature frost of -8.7 ℃, most of the grafted Citrus grandiflora was cut off