Status of nitrogenous and carbohydrate compounds as affected by nitrogen fertigation rates in young persimmon trees

摘要: Abstract The effects of nitrogen (N) fertigation rates on levels nitrogenous and carbohydrate compounds were determined in young ‘Fuyu’ persimmon trees. Total N amounts 0 g, 10 g, 20 g, 30 g, 40 g distributed, respectively, to a 50-L pot by as different volumes 1% (w/v) urea solution every week from May 15 September 25. Fruits sampled November 2, shoots roots 17. High significantly increased the amino acids all tree parts protein fruits shoots. In contrast, concentration soluble sugars decreased perennial rate 10 g 40 g. A notable reduction starch was also found trees with high rates. percentage died due cold injury during winter highest at 0 g rate; however, it 2.3-fold greater compared rate. We concluded that could interfere not only sugar accumulation through metabolism, but reserve carbohydrates organs.