Study On The Nutritive Characteristic And Effect Of Fertilizer In Jinhuang And Hongjinlong Mango

In recent years,with the China’s rapid development of the mango industry,the mango’s technical research and application have made tremendous progress.However, the species of mango renew so quickly that the research is lagged.This experiment research the main planted species of mango Jinhuang and Hongjinlong. From reaearching the nutrition changed law of leaves,the growth law of fruit,the nutrition changed and requirement law of fruit,the nutrition accumulation law of every party of tree.And then combine the soil nutrient condition in the mango garden to carry on the experiment of balance fertilization.Study different proportion-ment of N and K to the influence of the two kinds of mangos leaves on nutrition content.These are useful to fertilize and produce scientifically reasonably.1.According to the nutrition changed law of leaves,we can divided the whole growth cycle of mango to four phases:vegetative growth phase,which is from May to Septem-ber;reproductive growth phase,which is form October to December;fruit enlargement phase,which is from January to February;fruit maturation phase,which is from March to April.2.The annual average nutrition content in Jinhuang and Hongjinlong mango leaves are N>Ca>K>Mg>P>S>Mn>Fe>B>Zn>Cu,and the content of Nitrogen,Calcium in higher levels, Kalium is secondly,the content of Phosphor,Magnesium,Sulfur are approach,and the content of Copper is least,less than 5mg/kg.3.The annual average nutrition content in Jinhuang mango fruit are N>K>Ca>Mg>P>S>Fe>Mn>Zn>B>Cu. The annual average nutrition content in Hongjinlong mango fruit are K>N>Ca>Mg>P>S>Fe>Mn>Zn>B>Cu.On the whole,along with the growth of fruit mature, the nutrient content present to descend trend because of dilutedness.4.The dry mass accumulation of every part of Jinhuang and Hongjinlong trees are fruit>leaves>fallen flower and flower stalk>branch>fallen fruit; The proportion of dry mass accumulation in Jinhuang tree is fallen flower and flower stalk(1.99):fallen fruit(0.15): leaves(2.57):branch(1.00):fruit(5.87); The proportion of dry mass accumulation in Hongjinlong tree is fallen flower and flower stalk(1.33):fallen fruit(0.17):leaves(2.34): branch(1.00):fruit(4.88)。5. The accumulation of eleven kinds of nutrition elementes in Jinhuang and Hongjinlong trees are N>K>Ca>P>Mg>S>Mn>Fe>Zn>B>Cu.The proportion of major elements accumulationare N(2.03):P(0.21):K(1.72):Ca(1.00):Mg(0.15):S(0.12);The proportion of trace elements accumulation are Fe(1.00):Mn(3.08):Cu(0.06):Zn(0.18):B(0.14);The proportion of major elements accumulation are N(1.82):P(0.22):K(1.51):Ca(1.00):Mg(0.15): S(0.11);The propor-tion of trace elements accumulation are Fe(1.00):Mn(4.10):Cu(0.12): Zn(0.25):B(0.25).6.The content of nitrogen from N2K2 treatment is 1.69%,which is maximal.This is no marked difference among the different level of potassium fertilized to Jinhuang and Hongjinlong mango.