龙眼座果期间叶片矿质营养变化规律的研究

Study on Change Regularity of Mineral Element of Longan Leaves on Fruit Setting Period

[目的]为了解龙眼座果期间树体对养分的需求状况。[方法]采摘龙眼座果期间叶片,分析其矿质元素含量,探讨龙眼座果期叶片矿质营养变化规律。[结果]龙眼叶片中不同的营养元素在座果期内出现不同的变化规律,在大、中量元素中,N、K的变化最明显,P、Ca、Mg的变化不明显;在微量元素中,Fe的变化最明显,Mn、Cu、Zn、B含量相对稳定。[结论]在龙眼座果期间应适当补充N、K、Fe。

[ Objective] The purpose of the research on the nutrient need of longan during fruit-setting was explored through the experiment. [ Method ] The content of mineral elements in longan leaf during the fruit-setting was analyzed to discuss the change of mineral nutrition in leaf. [ Results ] There were different variation principles in different mineral nutrients present in longan leaf. In macro and medium elements, the content of N and K was with the most obvious changes and P, Ca and Mg, not significant; and in trace elements, the content of Fe was with the most obvious variation and Mn, Cu, Zn and B, relative stability. [ Conclusion ] It was necessary to properly add N, K and Fe in the period of longan fruit-setting.