Study On The Coated Fertilizer Of Container Seedling Of Pines Tabulaeformis, Platycladus Orientalis And Pinussylvesfris Var. Mongolica

On the base of the previous research, the experiment analyses the parameters of the special coated fertilizer on Pines tabulaeformis , Platycladus orientalis and Pinus sylvesfris var. mongolica. After the primary research on the release characteristics of the three coated fertilizer, meanwhile through large scale cultivation experiment, the best fertilization volume of the three special coated fertilizers was got. The results show: 1.The research on production art indicates: 1.1 Considering the relationship among production time, break time and production costs comprehensively, the conclusion that the production time of 10-20min is the best can be got. 1.2 There is some relationship between the density and volume of adhesive and the volume of the organic matter in the coated fertilizer: (1)The density and volume are 9% and 250 mL/ug when the organic matter in the fertilizer is 36%.(2) The density and volume are 9% and 250 mL/ug when the organic matter in the fertilizer is 36%.(3) The density and volume are 9% and 250 mL/ug when the organic matter in the fertilizer is 36%. 2. The experimental results of the release character indicate: 2.1 The nutrition release speed of the three coated fertilizer in the water is significantly lower than the release speed of the normal fertilizer of the same amount of nutrition. 2.2 The nutrition release speed of the three coated fertilizer in the medium is significantly lower than the release speed of the normal fertilizer of the same amount of nutrition. 2.3 The nutrition release speed of the three coated fertilizer in the substrate is significantly lower than the release speed of them in the water. 2.4 The initial release rate of the effective P and K of the three coated fertilizer all reach or close to the regulation of the European Standard Committee, the initial release rate of the NH4+-N is also lower than 40% which is the requirement of our country. 2.5 The three coated fertilizer all show the disadvantages that the differential release rate is too high. 2.6 The diameter of 3-5mm is the best fertilizer grain of Pines tabulaeformis , Platycladus orientalis and Pinus sylvesfrisvar. mongolica coated fertilizer. 3. Fertilizer effectiveness experiment of the three coated fertilizer show: 3.1 The fertilizer effectiveness of the coated fertilizer is much is much better than the normal fertilizer. 3.2 The best fertilization volume of the three coated fertilizer is: Pines tabulaeformis, 33g/30kg soil; Platycladus orientalis,30g/mL; Pinus sylvesfrisvar. Mongolica, 33g/mL. 3.3 The three coated fertilizer can reduce the nutrient release speed of the fertilizer, thus they can increase the utilization rate of fertilizer, reduce losing the nutrient; therefore, can reduce the pollution of the fertilizer to the environment.