Effect Of Fertilization By Injecting On Leaf Nutrition And Fruit Yield And Quality Of Red Fuji Apple

We used the method of fertilization by injecting and fertilization by trenching to studythe effects of photosynthesis characters, Leaf nutrition and fruit yield and quality of FujiApple. Different age Red Fuji apple trees was taken as the material in this experiment, andwas fertilized with different proportions of nitrogen, phosphorus fertilizer in young apple treesand different ratios of nitrogen, potassium fertilizer in different ages of apple trees in full fruitin Qianyang and Liquan orchard, Shaanxi province from March to June in2013. The mainresults were as follows:1. Application of different proportions of nitrogen, phosphorus fertilizer throughfertilization by injecting in young apple trees, obviously, improved leaf quality, increased thecontent of chlorophyll, enhanced net photosynthetic rate and leaf nutrition comparing with theditching fertilization. In the condition of the same amount of fertilizer, the experimental resultshowed that the treatment of application the0.15kg nitrogenous fertilizer and0.15kgphosphate fertilizer through fertilization by injecting was better compared with thefertilization by trenching. There were A significant increase on leaf fresh weight and leaf dryweight comparing with the ditching fertilization. Leaf area increased by12.9%, leaffresh weight and dry weight were increased by17.6%and23.4%; the total nitrogen contentand the total phosphorus content of leaves increased19.3%and44.9%respectively.2. Application of different fertilizer levels through fertilization by injecting have agreater impact on the yield and quality of the Fuji apples in full fruit period, with nitrogen,potash fertilizer improvement, single fruit weight and soluble solids content all obviouslyimproved, the ratio of rational application of nitrogen and potassium can significantlyincrease the content of chlorophyll, enhanced net photosynthetic rate, improved theproduction of individuals, improved the weight of single fruit significantly.3. For10-year-old Fuji apple, the treatment of application the0.28kg nitrogenousfertilizer and0.42kg potash fertilizer through fertilization by injecting can be significant toimprove the quality of leaf and leaf photosynthesis. Leaf fresh weight and dry leaf weightincreased by8%and10.1%, leaf total nitrogen, total phosphorus, total potassium content increased by5.3%,6.4%,5.1%, single fruit weight and yield per plant increased by15.4%and47.4%on average, total acid content decreased by10%.For19-year-old Fuji apple, the treatment of application the0.24kg nitrogenous fertilizerand0.48kg potash fertilizer through fertilization by injecting can be significant to improvethe quality of leaf and leaf photosynthesis. Leaf area, leaf fresh weight, dry leaf weightincreased by6.0%,1.6%,3.1%, leaf total N, total K content increased by20.0%and10.3%,fruit soluble solids content and yield per plant increased by2.1%and47.4%on average, fruitfirmness decreased by5.7%.4. Fertilization by injecting had relatively large effect on the fruit quality, average weightof single fruit was increased significantly with the increase of the amount of application N、Kof injecting fertilization.In conclusion, it will be beneficial to enhance tree vigor, increase leaf nutrition, andimprove fruit quality through fertilization by injecting. The fertilization method thatfertilization by injecting was worthy to be vigorously promoted in production.