Abstract:
【Objective】 To screen the main soil nutrient factors that affect the amino acids of junjujube fruit,and provide theoretical basis for improving the amino acid content,classifying and deepening the development and utilization of fruit,as well as scientifically applying fertilization in Junzao Jujube Orchard.
【Methods】 The soil nutrient status and fruit amino acid content of junzao orchard in Aral,Xinjiang were measured,and the correlation analysis and Multiple Linear stepwise regression analysis were carried out.
【Results】 Research shows that local jujube contains 15 types of amino acids,including 6 essential amino acids and 9 non-essential amino acids. Among them,the medicinal amino acids in jujube are 7 types,with a content of 1.08 ug/100g. The branched-chain amino acids are 3 types,with a content of 0.172 μg/100g. The aromatic amino acids are 5 types,with a content of 0.31 μg/100g. The umami amino acids are 4 types,with a content of 0.211 μg/100g. The bitter taste amino acids are 7 types,with a content of 0.322 μg/100g. The sour taste amino acids are 2 types,with a content of 0.789 μg/100g. The pH of the jujube orchard soil is 8.03. The salt content is 7.14 g/kg. The organic matter content is 12.96 g/kg. The total nitrogen content is 1.08 g/kg. The total phosphorus content is 1.01 g/kg. The total potassium content is 19.40 g/kg. The available phosphorus content is 55.60 mg/kg. The available potassium content is 232.37 mg/kg. The available copper content is 1.88 mg/kg. The available zinc content is 1.63 mg/kg. The available iron content is 24.39 mg/kg. The available manganese content is 4.33 mg/kg. The available boron content is 1.35 mg/kg. The hydrolyzable nitrogen content is 111.76 mg/kg. There are correlations between soil nutrients and jujube amino acid content.
【Conclusion】 The results showed that junzao jujube contained 15 kinds of amino acids,which were rich in medicinal amino acids,sweet amino acids and sour amino acids compared with other kinds of amino acids,the contents of organic matter,manganese and potassium were moderate,and the contents of other nutrients were on the high side,and there were synergistic and antagonistic effects among them. Moreover,the amino acid content of Junjujube was greatly affected by the available manganese,available zinc,available iron,available boron and organic matter in the soil,therefore,the application of organic fertilizer and micro fertilizer should be increased in the fertilization process in the future.