Research On Formula Fertilization And The Annual Dynamic Change Of Nitrogen,Phosphorous,Potassium Content For Choerospondias Axillaris

As an important native tree species,Choerospondias axillaries is a valuable afforestation pioneer tree species.It has fast growth rate,good textuer,wide use.Its fruit can use as drug.The paper selected half-year-old and two-year-old Ch oerospondias axillarisas materials.The study was undertaken with the relationshi p between grownstatus of half-year-old.seedling and fertilization,which taken ste ps with the single factor of N,P and the formula fertilization.The annual chang eregulation of nitrogen,phosphorous,potassium contents inleaves.Meanwhile,this paper carried out a research on the influence of the two-year-oldgrowth youngs tand.The annual change regulation of nitrogen,phosphorous,potassium content s in leaves and branches.Results showed that:(1)Under the condition of nitrogen fertilizer,the growth and plant biomas s of the seedlings increased with the increase of nitrogen fertilizer application r ate.However,when the N concentration exceeded a certain amount,the growth and plant biomass of the seedlings began to decrease.Height,ground diameter an d plant biomass in the 10g/tree reached the maxinum 120.0cm,1.07cm and 26g.Meanwhile,August was the exuberant period of that the growth morphologies of half-year-old Choerospondias axillaris.As seasonal variation,nitrogen has been a downward trend,phosphorus and potassium elements were first rise and then decline.Through the correlation analysis,Seedling of phosphorous onChoerospond ias axillaris and diameter and height growth is extremely important.Nitrogen,p otassium on the growth diameter growth has a significant role.(2)Under the condition of phosphorus fertilizer,the growth and plant bio mass of the seedlings increased.However,when the P concentration exceeded a certain amount,the growth and plant biomass of the seedlings began to decre ase.Height,ground diameter and plant biomass in the 50g/treethemaximum123.1c m,1.12cm and 27.9g.Meanwhile,August was the exuberant period of that the gr owth morphologies of half-year-old Choerospondias axillaris.As seasonal variati on,nitroge has been a down ward trend,phosphorus and potassium elements we re first rise and then decline.Through the correlation analysis,Seedling of nitrog en onChoerospondias axillaris and diameter and height growth is extremelyimp ortant.Phosphorouson the growth diameter growth has a significant role.(3)Proportion fertilizer on half-year-old Choerospondias axillaris test resul ts showed that:Formula fertilizer can promote the growth of seedling than sin gle application of nitrogen and phosphorus fertilizer.Height,ground diameter and plant biomass on each basin use urea 10g,calcium magnesium phosphate 30g,po tassium sulphate 15g reached the maximum 141.5cm,1.33cm and 55.3g.Meanwh ile,August was the exuberant period ofthat the growth morphologies of half-yea r-old Choerospondiasaxillaris.As seasonal variation,nitrogen hasbeen a downward trend,phosphorus and potassium elements were first riseand then decline.Throu gh thecor relation analysis,Seedling of nitrogen onChoerospondias axillaris and height growth is extremely important.Phosphorouson the growth heightgrowth h as a significant role.Nitrogen,potassiumon the growth diametergrowth has a sig nificant role.(4)Proportion fertilizer on two-year-old youngstand of Choerospondiasaxill aristest results showed that:The mode of 12 is the best methods thatdiameter g rowth increase 33.78%and height growth increase30.34%of annual Choerospo ndias axillaris with 2.0kg organic fertilizer of per plant.As seasonal variation,nitro gen,phosphorus and potassium has been a downward trend in leaves,nitrogen an d potassiumhas been a downward trend,phosphorus elements were firstrise and then decline in branch.Through the correlation analysis,Seedling of nitrogen,pot assiumonChoerospondias axillaris and height growth is extremely important.Pho sphorouson the growth heightgrowth has a significant role.Nitrogen,potassiumo n the growth diametergrowth has a significant role.Through the correlation anal ysis,Seedling of nitrogen,potassiumon Choerospondias axillaris and height growt h has a significant role.