Effect Of NBR And Organic Manure On Yield And Quality Of Fuji Apple Tree

Recently apple industries develop rapidly and have become one of mainstay industries growth in hilly regions on the Loess Plateau. But orchards yield is low and unsteady,owing to extensive management, maladjusted water and fertilization,deficient controll of plant diseases and insect pests. Aiming at phenomenon that improper orchards'fertilization leaded to nutritional maladjustment of trees'body and decline of yield and quality, the different concentrations of natural brassinolide,different amount of organic manure,or both compound was applied in the orchard in Gaopo village, Liulin town, Yan'an areas. Effect of natural brassinolide, organic manure on Fuji apples'yield and quality were studied through field investigation and indoor measurement, effect of the treatments on soil physics-chemistry character, resistive drought physiology and photosynthesis, growth, yield and quality were analyzed. Some problems of fertilization in Orchards were discovered by DRIS method. The results are as follows:1. After apple trees were sprayed with NBR, proline contents and the activities of peroxidase were enhanced 25.75%～61.09%, 38.5%～94.31% respectively and MDA contents were decreased distinctly 38.5%～94.31%. The net photosynthetic rate was increased 2.95%~42.65% and the water use efficiently was improved 24.8%～72.38%. The transpiration rate was decreased 51.43%~77.31%. Leaves'thickness was increased 20.69%～28.13% and 1 year growth of branch was decreased 16.76%～32.96%.The rate of fruit and flower on long and short branch was enhanced 24.23%～46.73%, 11.88%～24.41%,23.16%～31.25% respectively. General sugar and the rate of General sugar and acidity was improved 1.65%～5.56%, 0.51%～16.09% respectively. General acidity was decreased 11.54%～23.08%. yeild of single tree was increased 14.13%～22.30%.2. Apples'capabilities of resisting drought and adversity were enhanced by organic manure application. Proline contents were increased remarkably 1.46%～8.27% and MDA contents were decreased distinctly 0.27%～6%. The activities of superoxide dismutase and peroxidase were enhanced 1.46%～8.27% and 3.38%～20.96% respectively, the net photosynthetic rate and the water use efficiently were improved 1.09～43.60% and 25.66～27.54% obviously respectively. The transpiration rate and the stomatal conductance were...