Effects of different fertilization levels on the growth traits of Summer Black Grape

ObjectiveThe effects of different fertilization levels on the growth traits of Summer Black Grape were studied to provide scientific references for its field production. MethodThe cultivation conditions were made as follows:thin planting in flat shed (row spacing:2 m×8 m), rape stalk coverage of 3150.00 kg per hectare and base fertilizer application consisting of 630.00 kg lime, 63.00 kg magnesium sulfate, 15.75 kg zinc sulfate and 15.75 kg borax. With 4-year Summer Black Grape as experimental material , 7 treatments were designed with different ratios of N , P , K fer-tilizer and no fertilization as the control to observe and analyze the effects of different fertilization levels on the plant growth , fruit and the following year flowering traits of Summer black Grape . ResultThe stem diameter , the internode length and thickness of new shoots of Summer Black Grape were proportional to the increase of nitrogen application rate. As the nitrogen application rate increased,the discoloration of new shoots delayed and the following year flowering rate of decreased. in appropriate range of nitrogen amount,more potassium could advance the discoloration of new shoots. When nitrogen application was within the range of 0-36.60 kg/ha , the effect of nitrogen on produce of Summer black Grape was greater than that of phosphorus and potassium,and the fruit weight,panicle weight and yield increased with the nitrogen application increase. When nitrogen application reached 73.05 kg/ha ,the yield of Summer black Grape descended. Synthetically considering factors such as plant growth vigor,fruit quality,yield and the following year flower-ing rate of Summer black Grape, the most appropriate fertilizer turned out to be 36.60 kg N,11.85 kg P2O5 and K2O 47 . 25 kg per hectare . ConclusionDuring its cultivation time of summer Black Grape , nitrogen amount should be properly controlled.