Effects Of Fertilization Methods On The Growth And Mineral Nutrition Of Litchi

To explore the rational methods and fertilizer types to ensure sustainable development of high yield of litchi. In the first experiment, Jizuili and Qinzhouhongli as the test materials, by drip infusion and siphon drip treatment to improve the nutritional level of fruit trees, formate the efficient production of cultivation patterns, and improve fruit yield and quality purposes. In the second experiment, Feizixiao as the test materials, application of slowly releaseing fertilizer improve the nutritional level of the tree, improve the ability of bearing fruit, and achieve the purpose of improving yield of fruit. The results showed that:1,Through the siphon drip irrigation can improve soil nutrient content of litchi. Siphon drip irrigation improve soil available N, available P, available K, exchangeable Ca, exchangeable Mg content, and higher than the conventional soil application, infusion drip irrigation and the control treatment. Siphon irrigation water and fertilizer couple evenly drip irrigation water and fertilizer in the soil, thus reducing the waste of fertilizer in the soil, improving the use of fertilizer efficiency, improving the content of soil nutrient. Drip infusion supply low nutrient content in soil, it may be a part of of water and fertilizer trickle in soil, a large body of water and fertilizer directly absorbed and transported by the tree.2,Drip infusion of leaves N, P, K, Ca, Mg content are higher than the siphon drip irrigation, conventional soil application and the control treatment. Drip infusion of chlorophyll content, thick louvers and dry weight louver also is the highest, higher than the siphon drip irrigation, conventional soil application and the control treatment. 3,Treated by drip infusion of litchi fruit yield and quality have been improved. Drip infusion of fruit average weight, yield per plant, fruit vertical and horizontal diameter is the highest, higher than the siphon drip irrigation, conventional soil application and the control treatment. Drip infusion treatment of soluble sugar, soluble solids, Vc content was the highest, higher than the siphon drip irrigation, conventional soil application and the control treatment, fruit titratable acid of infusion drip are the lowest, lower than the siphon drip irrigation, conventional soil application and the control treatment.4,Through releasing slowly the fertilizer can release slowly the fertilizer for leaf chlorophyll content, N, P, K content, and higher than ordinary fertilizer and the control treatment. Slow-release fertilizer of resulting mother plants also have the highest length and diameter, higher than ordinary fertilizer and the control treatment.5,Spikes per plant and average total length of spikes of slow-release fertilizer plants are the highest higher, than ordinary fertilizer and control treatments; slow release fertilizer of litchi fruit weight, yield per plant, fruit vertical and horizontal diameter, soluble solids content also the highest, higher than the universal fertilizer and the control treatment.