Effects Of Ring Groove High Disk & Under-film Drip Infusion In Trunk On The Soil And Tree-growth Of Longan Orchards

The experiment used the technology of drip infusion in trunk on mature Longon trees, set up four treatments as follows:(1) ring groove high disk and drip infusion in trunk under albuginea; (2) ring groove high disk and drip infusion in trunk under black film; (3) ring groove high disk and drip infusion in trunk with non-film;(4) drip infusion in trunk without ring groove high disk and no film (CK).The primary conclusions of the study are as follows:1. Ring groove high disk and drip infusion in trunk under black film, ring groove high disk and drip infusion in trunk under albuginea treatment can effectively improve the surface temperature of the soil of longan.When the temperature is low, it is an effective method of ring groove high disk and drip infusion in trunk under black film,or ring groove high disk and drip infusion in trunk under albuginea to heat up and heat preservation on the surface of soil in longan orchard,that is advantageous to the soil root growth; When the temperature is higher, groove high disk and drip infusion in trunk under black film,or ring groove high disk and drip infusion in trunk under albuginea treatment of the soil average surface temperature as high as more than 30 degrees Celsius that exceed the optimum root growth temperature of Longan,so the best recommendation is not used the way of under-film drip infusion in trunk to manage the soil of Longan orchards, but ring groove high disk and drip infusion in trunk with non-film or drip infusion in trunk without ring groove high disk and no film may be employed.2. Ring groove high disk and drip infusion in trunk under albuginea treatment, ring groove high disk and drip infusion in trunk under black film treatment can significantly improved the soil moisture content and pH value in 0-20 cm and 20-40 cm soil layer. ring groove high disk and drip infusion in trunk under albuginea treatment, ring groove high disk and drip infusion in trunk under black film treatment can significantly increased the soil organic matter content and total nitrogen, total phosphorus, total potassium content in 0-20 cm and 20-40 cm soil layer. In 0-20cm soil layer, ring groove high disk and drip infusion in trunk under black film on soil organic matter content of longan orchards is the largest, to enhance the rate reaches the maximum; in 20-40cm soil layer, after six months of treatment, ring groove high disk and drip infusion in trunk under albuginea treatment increased soil organic matter best.3.Ring groove high disk and drip infusion in trunk under albuginea treatment, ring groove high disk and drip infusion in trunk under black film treatment can significantly promote the growth of the longan tree trunk diameter, but also help the growth of the tree, ring groove high disk and drip infusion in trunk under albuginea treatment, ring groove high disk and drip infusion in trunk under black film treatment can significantly promote the growth of the longan roots, the effect of ring groove high disk and drip infusion in trunk under albuginea treatment on increasing the number of roots is the most obvious, ring groove high disk and drip infusion in trunk with non-film treatment play no significant effects in increasing the number of roots, ring groove high disk and drip infusion in trunk under black film treatment have a greater impact on the soil roots fresh weight in 0-20cm soil layer, but rather ring groove high disk and drip infusion in trunk under albuginea treatment have a greater impact on the soil roots fresh weight in 20-40cm soil layer.4. Ring groove high disk and drip infusion in trunk under albuginea treatment, ring groove high disk and drip infusion in trunk under black film treatment, ring groove high disk and drip infusion in trunk with non-film can improve relative water content of longan leaves, twigs water potential, SPAD value of leaves, thick blinds, louvers weight, leaf area and total nitrogen,total phosphorus and total potassium content of longan leaves. The PSII original light energy conversion efficiency is higher, stronger adaptability to habitat of ring groove high disk and drip infusion in trunk under albuginea treatment, the potential activity of PSII reaction center is strong, and the absorption of light energy for the most part of photosynthetic electron transport, that’s photosynthetic characteristics strongest.5. Ring groove high disk and drip infusion in trunk under albuginea treatment, and ring groove high disk and drip infusion in trunk under black film treatment can significantly increase fruit diameter, longitudinal diameter, significantly improve fruit quality,such as edible rate, soluble solids, soluble sugar, vitamin C, etc., also significantly increased single fruit weight, single panicle weight, increase yield per plant, reduced fruit cracking rate.Comprehensive Analysis of effects of ring groove high disk and under-film drip infusion in trunk on the soil and Tree-growth of Longan Orchards, it can be found that ring groove high disk and drip infusion in trunk under albuginea treatment, and ring groove high disk and drip infusion in trunk under black film treatment can significantly improve soil nutrients, water and heat conditions, but also significantly increase the longan tree nutrients, water content, fruit quality and yield. Effects of ring groove high disk and drip infusion in trunk under albuginea treatment, and ring groove high disk and drip infusion in trunk under black film treatment on the growth of longan trees are not significantly different,but ring groove high disk and drip infusion in trunk under albuginea have a greater result to improve fruit quality, ring groove high disk and drip infusion in trunk under black film for increase production more effective.