Analysis On The Variation Law Of Main Nutrients In Leaf Of Quercus Mongolica

The contents of reducing sugar,total sugar,flavonoids,nitrogen,phosphorus and potassium in the leaf of Quercus mongolica were detected.The leaf were analyzed for the changing trends of nutrients during different growth periods.Determined the best time for the use of Quercus mongolica leaf.Reveal the law of leaf nutrient variation among the clones of Quercus mongolica.It provides basis for the use of excellent varieties for leaf breeding.The main research results are as follows:?1?Reducing sugar:Significant differences in reducing sugar content in leaf of Quercus mongolica at different growth stages(F=5.14^**).Overall upward trend from May 15 to October 15.The peak of that content reached on September 15.The peak is8.1568 g/kg.Significant difference in reducing sugar content among leaf of Quercus mongolica clones?F=74.26**?.No.20 clone has the highest reducing sugar content of15.0713 g/kg.?2?Total sugar:Significant differences in total sugar content in leaf of Quercus mongolica at different growth stages(F=3.39^**).Overall upward trend from May 15 to October 15.The peak of that content reached on August 30.The peak is14.852g/kg.Significant difference in total sugar content among leaf of Quercus mongolica clones(F=111.74^**).No.9 clone has the highest total sugar content of19.8195g/kg.?3?Flavonoids:Significant differences in flavonoids content in leaf of Quercus mongolica at different growth stages(F=2.98^**).Overall trend of first rise and then decline from May 15 to October 15.The peak of that content reached on July 30.The peak is 2.1179g/kg.Significant difference in flavonoids content among leaf of Quercus mongolica clones(F=405.55^**).No.3 clone has the highest flavonoids content of 8.7714g/kg.?4?Total nitrogen:Significant difference in total nitrogen content among leaf of Quercus mongolica clones(F=91.76^**).No.19 clone has the highest total nitrogen content of 8.7714g/kg,and the total nitrogen content of clone No.12 was at a relatively high level of 1.968%.?5?Total phosphorus:Significant differences in total phosphorus content in leaf of Quercus mongolica at different growth stages(F=2.9^**).Overall decrease trend from May 15 to October 15.The peak of that content reached on June 30.The peak is4.935g/kg.Significant difference in total phosphorus content among leaf of Quercus mongolica clones(F=85.35^**).No.9 clone has the highest total phosphorus content of6.1659g/kg.?6?Total potassium:Significant differences in total potassium content in leaf of Quercus mongolica at different growth stages(F=12.17^**).Overall decrease trend from May 15 to October 15.The peak of that content reached on May 15.The peak is79.309g/kg.Significant difference in total potassium content among leaf of Quercus mongolica clones(F=294.10^**).No.9 clone has the highest total potassium content of56.3256g/kg.?7?Inter-nutrient correlation:There was a significant positive correlation between reducing sugar and total sugar content in leaf of Quercus mongolica?r=0.50446**?.There was a significant negative correlation between reducing sugar and total phosphorus content?r=-0.27280*?.There was significantly negative correlation between reducing sugar and total potassium conten?r=-0.25798*?.There was a significant positive correlation between total phosphorus and total potassium content?r=0.499008**?.There was a significant negative correlation between flavonoids and total nitrogen content?r=-0.67157**?.