摘要
２０年的研究表明，苹果根系生长１年有３次高峰。新梢与根系生长是交互进行的。根系的第１次生长高峰在花前８～１３ｄ，春梢生长高峰在花后１９～２４ｄ；根系的第２次生长高峰在春梢停长后７～８ｄ．根的第３次生长于秋梢停止至落叶前。苹果根系的第１，２次生长之间，正值春梢的急速生长期，有一个养分转换期。苹果根剪具有控冠抑长作用，宜在花前１０ｄ进行。根据苹果地上部与地下部的生长特点，应于花前８～１３ｄ、养分转换期以及秋梢停长后到根系第３次生长初进行追肥及施入基肥。
After 20 years stadied,the experiment showed that there were three growing peaks in rcot sys-tem yearly,the growth of young shoot and root system was alternate.The first growing peak Of root systemwas in 8～13 days before blcom,the first growing peak of spring shoot was in 19～20 days after bloom. Thesecond growing peak of root system was in 7～8days after autumn shoot stoped growth. The third growingpeak was in the peried from growth of autumn shoot stopod to leaf falled.There was a period of transforming nutrient in the rapld growing period of spring shoot,namely,between the first growing peak of root systemand the second.Cutting root had an affection in restraining growth of shoot and tree-crown,the optimal pe-riod of cutting root was in ten days before bloom.According to the growing charcteristics of terraneous partand subterranean part in apple,Top-dressing and base manure were suitable applied in 8～13 days before bloom,as well as in the period of transforming nutrient,namely,from the period that the growth of autumnshoot stoped to the rcot system began the third growth.
出处
《江苏农学院学报》
CSCD
1995年第2期55-58,共4页
Jiangsu Agricultural Research
关键词
苹果
根系
地上部
apple
root systems:correlations/terraneous part
