金瓜对氮磷钾三要素的吸收特性的研究初报

亩产2500kg 金瓜,一生至少需吸收氮6.91kg,磷1.21kg,钾7.77kg,其中80%以上是在座果以后吸收的。在金爪的各个器官中,氮的含量叶片中最高,钾的含量叶柄中最高。在金爪的整个生期长间,氮钾相对量的变化呈双峰曲线,一个是在苗期,另一个是在雌花始期,磷的相对量变化规律是苗期含量较高,倒蔓期最低,雌花开放以后,一直维持在较高水平。

PRELIMINARY STUDY ON CHARACTERISTICS OF ABSORBING NUTRIENT OF CUCURBITA PEPO L.

To obtain per 2500 kiogram yield of C.pepo L.fruits,it is necessary that 6.91 kilogram nitrodren,1.21 kilogram phosphrus and 7.77 kilogram potassium are absorbed at least by C.pepo L.during its entire period,and mot ethan 80 percent in the total amount of nitrodren,phosphrus and potassium are absorbed after fruiting.In verious organs of C.pepo L.,the nitrodren content of the leaves is more than others.So is the patassium content of the petiole.There are two peaks of the nitrodren and pat assium in its plant during entire period of C. pepo L.,one is in the seedling stage,the other is the stage wnen first female flower is opening.The phosphrus content in its seedling stage is higher,it is lower when stem is just expanding,the higher phosphrus content has been kept since the female flower opens.