Study On The Correlation Between Junzao Tree Nutrition Level And Soil Mineral Element Content

Jujube,as one of the pillar industries in Xinjiang,has leapt to the forefront of the country in terms of planting area and output.In order to fully understand the content of mineral elements in the jujube tree and the annual changes of soil available nitrogen,phosphorus,potassium,organic matter,and mineral elements,and to provide a theoretical basis for rational fertilization,this study takes 6-7 years old jujube as the research object,through analysis The mineral element content changes of soil,leaves and fruits in the annual development cycle of Junzao were determined,and the distribution of mineral element contents in various organs of the tree during the flowering and fruiting period was verified,which provided a theoretical basis for rational fertilization and precise fertilization.Concluded as follow:(1)With the growth and development of Junzao,the contents of phosphorus,potassium,magnesium,zinc,and sulfur in the leaves generally showed a decreasing-increasing-decreasing trend.The content of phosphorus,potassium,calcium,magnesium,sulfur,manganese,boron,and zinc in Junzao fruit showed a downward trend with the growth and development period,while the molybdenum content showed an upward trend during the growth period of the year,and the iron content changed more Stable,the nitrogen content fluctuated greatly.The distribution of mineral elements in various organs of the tree during the flowering period,fruit expansion period,hard core period,white ripening period and red ripening period are: potassium,magnesium,phosphorus,sulfur,boron and manganese are concentrated in the young parts of the tree In the organs,the above-ground iron content of the tree body is higher than that of the underground part;the molybdenum content is evenly distributed in each organ of the tree body,and there is no significant difference in the content.The boron content is not significantly different in the branches at all levels.(2)The pH value of the soil showed a "rising-falling-rising" trend with the phenological period of the jujube tree,and the salt content showed a "declining-rising-falling-rising" trend.The organic matter and available nitrogen content increased with the date tree The phenological period showed a "rising-declining-rising" trend,and the content of available phosphorus generally showed a "declining-rising-declining-rising-declining-rising" trend with the phenological period of jujube trees,and the content of quick-acting potassium increased with the date of jujube trees.The phenological period generally shows a "declining-rising-declining-rising" trend.With the change of phenological period,the potassium content in the 20-40 cm and 40-60 cm soil layers are all "rising-falling-rising" trends;the magnesium content in the 20-40 cm and 40-60 cm soil layers generally shows a volatility decline The change trend of calcium and boron content in the 20-40 cm and 40-60 cm soil layers generally shows a rising trend;the zinc and copper content changes more smoothly throughout the year;the molybdenum content fluctuates in the 20-40 cm and 40-60 cm soil layers Larger.(3)Correlation analysis shows that the mineral element content of each organ of the tree has a certain correlation with the corresponding mineral element content in the soil: boron in the soil and potassium in the leaves,potassium,phosphorus in the branches,and sulfur in the roots show There is a very significant negative correlation,and there is a significant positive correlation with the copper in the leaves and the iron content in the branches;the phosphorus in the soil is very significantly negatively correlated with the copper in the fruits and the iron in the branches.