摘要
1989～1990年对山茱萸叶片、果实主要营养元素年动态变化规律研究结果表明:果实的氮、磷随叶片变化而变化,钾则相反。无论高、中、低产树,叶片年均含氮量(1.281%～1.854%)均偏低,磷素(0.066%～0.084%)缺乏,这是造成4、5月份生理落果的主要原因。钾素(1.021%～1.701%),营养居中等水平。三种元素的营养转换期依次出现于5、7、8月份。大、小年影响树势平衡,10月中旬各叶片氮、磷、钾含量差异极显著。
The experiment carried out in 1989～1990 showed that nitrogen and phosphorus con-
tents in fruit varied with different nutritive element contents of leaves,no change was shown in
potassium content.The average nitrogen contents(1.281%～1.054%)in leaves were slightly low;
average phosphorus contents(0.066～0.084%)were deficient.Such low nutritive contents were
the main reason why the phenomenon of physiological premature drop occurred.Differences among
the contents of nitrogen,phosphorus and potassium in various leaves were significant in the middle
ten days of October.
出处
《河南农业大学学报》
CAS
CSCD
1992年第2期202-206,共5页
Journal of Henan Agricultural University
关键词
山茱萸
叶片
果实
营养元素
Macrocarpium officinala
leaf
fruit
nutritive element
