| Armeniaca vulgaris cv. Luntaibaixing is the superior breed in the origin territory of Luntai, Southern Xinjiang Basin. As it was an either variety of dry, fresh and opening almond processing, it has now become the main variety of local special fruit industry development in the Southern Xinjiang Basin. Lacking in the guidance of scientific fertilization techniques for a long time, its body nutrient deficiency and imbalance of nutrient elements were extremely serious, which might affect the yield and quality. Therefore, with the method of field sampling and indoor chemical analysis, the research was started from soil fertility in production garden, seasonal dynamic of its leaf nutrient element, leaf nutrient diagnosis index system with DRIS and so on. In this study, A. vulgaris cv. Luntaibaixing in the flourishing time was taken as the research object, and the nutritional needs of its growth and development was considered as the starting point. The main results are as follows:According to principal component analysis, soil fertility evaluation in100production gardens,9towns showed the overall soil fertility was at or below middle level, and only3%of the production gardens were at high fertility level. Pearson correlation analysis and double screening linear regression analysis showed there was no significant correlation between leaf and other elements in the soil, except that there was a significant positive correlation between P concentration in leaves and available P in soil. However, under the influence of other soil nutrients, there was a significant positive linear correlation between P, K, Cu, Zn concentration in leaves and its corresponding total P, total K, available K, available Cu and available Zn in soil, while there was a significant negative linear correlation between N and Mn in leaves and its corresponding total N and available Mn in soil. Overall, the relationship between the concentration of nutrient element in A vulgaris cv. Luntaibaixing leaves and soil fertility was not highly relevant.Seasonal dynamic analysis of nutrient element concentrations in leaves during the fruit growth period, with the fruit growth period elapsing, the concentration of N, P, K, Fe and Cu in leaves showed a downward trend, while the concentration of Ca and Mg showed a rising trend, and the concentration of Mn and Zn fluctuated. In the late June, the concentration of nutrient element in leaves was relatively stable during the fruit ripening period, which could be taken as the optimal sampling period of DRIS diagnosis A. vulgaris cv. Luntaibaixing leaf nutrient.According to leaf nutrient analysis by DRIS, leaf nutrient diagnosis index system of A. vulgaris cv. Luntaibaixing with DRIS was built. The nutrition diagnosis index consists of3concentration indexes of nutrients including P, Cu, Zn and19concentration ratio indexes of nutrients including N/P, P/Fe, K/Fe, Ca/P, Mg/P, Mg/K, Mg/Fe, Mg/Cu, Fe/Ca, Mn/P, Mn/Fe, Cu/P, Cu/K, Cu/Fe, Zn/P, Zn/K, Zn/Mg, Zn/Fe, Zn/Cu. The suitable value of each nutrient concentration in leaf were N (22.95-26.77) g/kg, P (0.89-1.61) g/kg, K (25.73-29.52) g/kg, Ca (25.95-34.41) g/kg, Mg (7.58-8.15) g/kg, Fe (66.74-133.66) mg/kg, Mn (10.24-14.72) mg/kg, Cu (12.45-14.51) mg/kg and Zn (47.77-71.42) mg/kg. |
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