Effects of Different Leaf Fruit Ratio on Fruit Grading and Nutrient Distribution in'Orah'Mandarin
Different leaf/fruit treatment was conducted to study the effects on fruit grading and nutrient distribution in'Orah'mandarin,and to screen the most suitable leaf/fruit ratio of'Orah'mandarin during cultivation.Fruit thinning was conducted.The fruit number and yield of different grading fruit were investigated under different leaf/fruit ratio,and the correlation was analyzed.The difference of macronutrients in leaves and fruits were determined and the characteristics of nutrient changes were analyzed during the whole growth period.The results showed that the leaf/fruit ratio was negatively correlated with yield,fruit number of whole tree,and positively correlated with average fruit diameter and ratio of 70-80 and＞80 mm grading.When the leaf/fruit ratio was 30-40,the ratio of 70-80 and＞80 mm grading was the highest,and the opti-mal leaf/fruit ratio was30-40.At fruit enlargement stage,the content of nitrogen in the leaves was significantly higher than that in fruits at15,30 and 60 leaf/fruit ratio.The content of phosphorus in fruits was significantly higher than that in leaves at 60 leaf/fruit ratio.The content of po-tassium in the fruits were significantly higher than that in leaves at 30 and 60 leaf/fruit ratio.In addition,the content of macronutrients was high-est from May to July at the early stage of fruit enlargement.It was concluded that the optimal leaf/fruit ratio was30-40,and adequate nutrients should be provided to the fruit trees during the fruit enlargement period.This study provides important data support for fruit thinning and nutrient management of'Orah'mandarin in Guangxi.
'Orah'mandarinLeaf fruit ratioFruit gradingFruit diameterNutrient
万方数据
维普
