海南金煌芒果叶片营养规律研究

通过对海南省三亚市金煌芒果叶片中N、P、K、Ca、Mg、S、Fe、Mn、Cu、Zn、B十一种营养元素含量进行全年跟踪分析，结果表明：⑴金煌芒果叶片养分年平均含量大小为：N>Ca>K>Mg>P>S>Mn>Fe>B>Zn>Cu，其中N、Ca含量较高，P、Mg、S、Zn含量月变化不明显。⑵金煌芒果的生长周期可分为4个阶段:营养生长期(5～9月)、生殖生长期(9～11月)、果实膨大期(11～2月)和果实成熟期(2～4月)。各阶段叶片养分含量变化规律有所差异: 营养生长期，叶片中营养元素除K、Cu含量有所下降之外，其余营养元素均有不同程度的升高。生殖生长期，叶片中的营养元素N、B、Ca含量上升，其他元素含量有不同程度的下降。果实膨大期，叶片中的N、K、Fe、Zn、B含量下降，Ca、Cu、Mn含量上升。果实成熟期，叶片中N、Mn、Fe、B、Cu含量均有不同程度增加，K、Ca含量有所降低。

Research on the Rules of Nutrition Contend in Jinhuang Mango Leaves in Hainan

After monthly sample and analysis the eleven nutrient elements such as Nitrogen,Phosphor,Potassium,Calcium,Magnesium,Sulfur,Iron,Manganese,Cuprum,Zincand Boron contend in Jinhuang mango leaves in Sanya in Hainan for a whole year.The results shown as follows：⑴The annual average nutrition content in Jinhuang mango leaves are N〉Ca〉K〉Mg〉P〉S〉Mn〉Fe〉B〉Zn〉Cu,and the content of Nitrogen,Calcium in higher levels , the content of Phosphor,Magnesium,Sulfur and Zinc in leaves fluctuated slightly.⑵We can divided the whole growth cycle of Jinhuang mango to four phases：vegetative growth phase,which is from May to September;reproductive growth phase,which is form September to December;fruit enlargement phase,which is from December to February;fruit maturation phase,which is from February to April.The change rules are not the same in different phases：during the vegetative growth phase,the content of all nine nutrient elements in leaves increased but Potassium, Cuprum declined;during the reproductive growth phase,the content of Nitrogen,Boron,Calcium in leaves increased,and the other declined;during the fruit enlargement phase,the content of Nitrogen,Potassium,Iron,Zinc,Boron in leaves declined,the content of Calcium,Manganese,Cuprum in leaves increased;during the fruit maturation phase,the content of Nitrogen,Manganese,Iron,Boron,Cuprum in leaves increased in different degrees,the content of Potassium, Calcium in leaves declined.