The study on different wine-grapes absorbing and using potassium

Water-culture experiment and field experiment are completed and the result shows that densities of medium of maximum accumulated dry masses are not equal, and density of red grapes(120μmol/L) is higher than that of white grapes(80μmol/L),and growth rate,utilization rate of potassium, density of potassium in plant and root/shoot ratio are remarkable diverse. The depending-rate of red grapes to potassius in soil is 53.1%～80.3%,and its potassium utilization rate is high. While the depending-rate of white grapes to potassium in soil is 56.5%～82.1% and its potassium utilization rate is low.Potassium can affect weight of plant,length of root,number of root,weight of a hundred grains,bearing branch, and increase the content of sugar and wine,and decrease acid degree.