Study On The Pattern Of Requirement Of Fertilizer And Fertilization For High Yield,Quality And Efficiency Of Red Globe Grape

Content:Through studying distribution and consistency variation of nitrogen,phosphorus,potassium in organ and content of nitrogen,phosphorus,potassium in every period of Red Globe grape,we conclude the pattern of requirement of fertilizer of Red Globe grape. By doing field fertilizer experiment with 3 factors 4 levels of Red Globe grape,we obtain fertilizer parameter of Red Globe grape(1)utilization ratio of nitrogen fertilizer (N 46%),phosphorus fertilizer(P2O5 46%),potassium fertilizer(K2O 33%) is 31.04%,5.26%,48.65%;(2)utilization coefficient of nitrogen in soil is 0.7386,utilization coefficient of phosphorus in soil is 0.7018,utilization coefficient of potassium in soil is 0.2969;(3)the amount of nitrogen,phosphorus ,potassium absorbed by 100kg grape is 0.6806kg , 0.3988kg, 0.8154kg respectively. The result of experiment indicates nitrogen fertilizer,phosphorus fertilizer,potassium fertilizer in the suitable number of fertilization have effect on increasing yield of grape and the effect of nitrogen on increasing yield is highest. We also calculate the fertilizer response function of Red Globe grape :Y=1061.647+41.6969N-0.6587N2+24.6112P-0.9530P2+36.4696K-0.8227K2 , its economic optimum fertilization:nitrogen fertilizer 30.18kg/667m2 , phosphorus fertilizer 11.66kg/667m2,potassium fertilizer 21.22kg/667m2 and optinum ratio of fertilization:N:P2O5:K2O=1:0.39:0.98. The result of testing quality is that nitrogen fertilizer can raise weight of per berry,but too much of nitrogen fertilizer can increase titratable acidity and decrease quality of berry;phosphorus fertilizer can improve content of total soluble solids in berry and reduce titratable acidity,potassium fertilizer has important function to increase content of total soluble solids.