Effects Of The Infusion Fertilization On The Growth And Development Of Longan

To explore the high-yield, high-quality, save labor efficiency and less pollution of modern agricultural development mode. The study is expanded on two experiments,In the first experiment,The test material is the Longan cv.Guixiang,by the infusion drip irrigation to improve the longan body nutrition, it increase fertilizer use efficiency, promote tree nutrient absorption, high productivity and efficiency in order to establish longan cultivation mode to achieve the goal of high yield and quality. In the second experiment, The test materials are the Longan cv.Guixiang and Zaoshuyihao. pipeline infusion could improve the nutrition of the tree to reach the tree absorb nutrients, according to their own needs and to ensure the supply of nutrients to reduce fertilizer pollution of soil, reducing shattering to improve yield and quality target. The main conclusions are as follows:1、By the infusion drip irrigation, fertilization can improve the of longan leaf chlorophyll content, and leaf nutrient. The chlorophyll content of the infusion drip fertilization treatments than conventional soil applied treatment, tree physical photosynthesis produce photosynthetic products for plant growth. Leaf N, P and K content is higher than the conventional soil application treatment, improved tree nutrition, is conducive to the growth of leaves and fruit, the infusion drip fertigation are mostly through tree xylem absorption, transport and transformation, only a small amount of water and fertilizer into the soil, improve the utilization of water and fertilizer. Infusion drip fertigation greatly reduce the waste of fertilizers in the soil and environmental pollution.2、By infusion drip irrigation, fertilization can reduce the number of longan fruit drop. The fruit grains per ear of different periods of the the infusion drip fertigation treatment were higher than the conventional soil application treatment, the infusion drip fertigation can quickly deliver nutrients to ensure that large amounts of nutrients required for fruit development, and not due to lack of nutrients caused fruit drop.3、Infusion drip fertigation can improve quality and increase production. The soluble solids, soluble sugar content and fruit nutrition of infusion of nutrient solution treatment than infusion of compound fertilizer and soil application treatment, the quality of soil application treatment is the worst. The fruit diameter, fruit weight and yield per plant of infusion of compound fertilizer than infusion of the nutrient solution and soil applied treatment, soil application treatment is minimum. The infusion drip irrigation can accelerate the accumulation of fruit sugar, choose different water and fertilizer to improve fruit quality and yield varying degrees, with liquid fertilizer ratio of nutrient elements related.4、The pipeline infusion fertilization can increase leaf chlorophyll content, leaf nutrient and shoot length. Pipeline infusion fertilization can postharvest tree vigor recovery faster, better train fall tree Mother Shoots, and to lay the foundation for next year’s production. Leaves of N, P, K, Ca and Mg content of pipeline infusion treatment are higher than conventional soil application treatment, it could improve tree nutrition and be conducive to the growth and development of flowers and fruit.5、Pipeline infusion fertilization can improve leaf protein content and nitrate reductase activity. Pipeline infusion fertilization of nitrogen supply are fully able to increase the consumption of large amounts of protein in the flowering season. Pipeline infusion fertilization greatly increased nitrate reductase activity, reflecting the pipeline infusion fertilization nitrogen metabolism, increasing plant nutrient uptake capacity and resilience.6、Pipeline infusion fertilization can reduce the number of drop-female flowers and improve fruit set. It can effectively provide the nutrients needed to fruition, reduce the number of drop-female flowers and physiological fruit drop, to ensure stable production and yield of longan.7、Pipeline infusion fertilization can improve fruit quality and increase production. It can effectively improve the nutritional fruit soluble sugar content, Vc content and soluble solids, reduce the titratable acid content. It promote the fruit diameter stretching and increase fruit weight and yield. Pipeline infusion fertilization can accelerate the speed of the fruit sugar accumulation. 8、Pipeline infusion fertilization can maintain soil pH, reduce the impact on the soil environment. The content of soil organic matter declines, it prove that tree is infusing in pipe at the same time, the roots are also absorbing soil nutrients, in this way does improve the overall nutritional level of the tree.