Study On The Parameters Of Nitrogen,Phosphorus And Potassium Fertilizer Application In Corylus Heterophylla×avellana Based On Fertilizer Effect

A 9 a hybrid hazelnut from xinjiang was studied."3414"field fertilizer effect test was used,Diurnal changes of photosynthetic characteristics and chlorophyll maximum photoenergy conversion efficiency of hazelnut leaves and their responses to yield and quality were determined with different fertilization ratios.Multiple linear regression method was used to analyze the relationship between Pn,Fv/Fm,average nut yield per plant and average nut quality in five growth stages of N,P and K in hazelnut.The N,P and K fertilization parameters were obtained by further comprehensive decision.The main conclusions are as follows:1.The maximum value of the daily accumulation of net photosynthetic rate in the five growth stages of hazel tree appeared in the processing of "double peak" curve.The Fv/Fm parameters of fertilization treatment were all higher than those of control Fv/Fm.2.Through the preliminary fitting of the regression equation of fertilizer effect in the field,the effects of N,P and K on the photosynthetic characteristics of the hybrid corylus heterophylla were obtained as follows:when N was 0.8537 kg/plant and 0.5000 kg/plant,there was a positive effect on Pn and Fv/Fm at the fruiting stage;When N was 0.9302 kg/plant,K was 0.1097 kg/plant or N was 0.6670 kg/plant,K was 0.1078 kg/plant,there were positive effects on Pn and Fv/Fm in the fast-growing period.When N was 0.4048kg/plant,P was 0.2237 kg/plant,or N was 0.6875 kg/plant,there were positive effects on Pn and Fv/Fm at the hard core stage.When N was 1.014 kg/plant or N was 0.631 kg/plant and P was 0.4211 kg/plant,there was a positive effect on Pn and Fv/Fm in the lipid phase.When N was 0.375 kg/plant,there was a positive effect on Fv/Fm at the mature stage.3.Through the preliminary fitting of the regression equation of fertilizer effect in the field,the effect relationship of N,P and K on the yield of hybrid hazelnut was obtained as follows:when N was 0.7241kg/plant and K was 0.1978 kg/plant,there was a positive effect on "New Hazelnut 1".4.The preliminary fitting of the regression equation of fertilizer effect in the field showed that N,P and K had a positive effect on hazelnut quality in the hybrid of pinus heterophylla:when N was 0.9130,0.6400,0.6296,0.4375 kg/plant,there were positive effects on single fruit weight,kernel weight,crude protein and crude fat.When P was 0.3061,0.1872,0.4271,0.4231 kg/plant,there were positive effects on yield,kernel weight,crude protein and crude fat.When K was 0.181 kg/plant,there was a positive effect on single fruit weight.5.According to the above fertilizer regression equation in the field,the fertilizer parameters of N,P and K in hazelnut hybrids were determined as follows:N fertilizer application amount(pure amount)was 0.7155 kg/plant,P fertilizer application amount(pure amount)was 0.2870 kg/plant,and K fertilizer application amount(pure amount)was 0.1228 kg/plant.