Chunjian is a hybrid of Qingjian and Japanese Ponkan F-2432 in 1979. 1999 was introduced by China Citrus Research Institute. 20 1 1 The citrus variety "Chunjian" introduced by Fruit Research Institute of Fujian Academy of Agricultural Sciences and Sanming Economic Crop Technology Extension Station passed the variety identification in Fujian Province.
Growth habit
Under the condition of greenhouse cultivation in Quzhou area, Chunjian germinated around March 10, blossomed around April 15, and blossomed around April 2 1. 1 The physiological fruit-setting period is from late April to mid-May, and the second physiological fruit-setting period is from early May to late July.
Spring shoots germinate from mid-March to late April, summer shoots from early May to late July and autumn shoots from early August to late September. The color change period of the fruit is in the middle and late June, and the maturity period is from early February to early March of the following year, and the tree can be hung until early May.