‘金昱’梨新梢与果实生长发育动态研究

Study on change of ‘Jinyu' pear twig and fruit growth

以6年生的‘金昱’梨(Pyrus pyrifolia Nakai‘Jinyu’)为研究对象,对其新梢与果实生长发育动态进行研究。结果表明:‘金昱’梨新梢自3月下旬开始生长,到6月下旬停止生长,新梢长度从2.08 cm增长到101.72 cm,生长期为92 d,生长期间出现1次生长高峰;果实从4月初开始坐果,到8月上旬果实成熟停止生长,生育期125 d,果实纵、横径生长呈S形曲线,发育过程中出现3次生长高峰,分别在4月20日、6月8日、7月6日;新梢生长与果实生长发育关系密切,前期新梢与果实生长养分竞争激烈,后期新梢停止生长后果实膨大迅速并到达生长高峰。

Change of ‘Jinyu' pear twig and fruit growth of six years aged trees were investigated in the present paper. Results showed that new twig grew in late March, and terminated in late June with the development period of 92 days, shoot length increased from 2.08 cm to 101.72 cm. There were one growth peaks during the growth period. Fruit grew with the fruit setting in early April and matured in early August with the development period of 125 days. The growth of fruit length and diameter size showed S type growth curve, with three growth peaks during the development period in April 20 th, June 8 th and July 6 th, respectively. The growth of new twig was tightly related to the development of fruit, the new twig competed nutrition with fruit in prophase time, in metaphase time the competition were reduced, in anaphase when the new twig terminated, the fruit swelled rapidly and reached growth peak.