Accumulation properties of mineral elements in two types of Chinese jujube

Aim to find out absorption and distribution properties of mineral elements in jujube trees，and to provide a reasonable fertilization system，field experiments were conducted to analyze the composition of the characteristics of biomass，mineral elements content and its accumulation at different parts of jujube trees（Jun jujube，Hui jujube），which are cultivated about 3 years. The results show that jujube fruit dry matter accumulation is the biggest, followed by the trunk, leaves and fine roots again. N were mainly assigned to the leaves and fruit. P，K were mainly assigned to the fruit and leaves. Ca, Mg were mainly assigned to the leaves and trunk. The absorption ratio of N:P:K is 1:0.063-0.083:0.41-0.46 in new vegetative organs and 1:0.19-0.20:1.34-1.48 in fruit. To attain 1000 kg dry matter fruit，Jun jujube trees should uptake N 32.8 kg，P 3.4 kg and K 23.1 kg, and N 20.5 kg、P 2.7 kg and K 17.7 kg should be absorbed by Hui jujube trees to produce so much dry fruit. Jun jujube trees need to absorb more nutrients than Hui jujube trees to produce the same dry fruit, and the proportion of N, Ca, Mg was higher either. Nutrient distribution rate of Jun jujube trees in the leaves was significantly higher than that of Hui jujube trees, but it was significantly lower than Hui jujube trees in fruit. Fertilization in vegetative growth stage should be N fertilizer primarily，supplemented by a small amount of P and K fertilizer. In the fruit growth period, the application proportion of N fertilizer should be reduced to increase the proportion of P and K fertilizer.