Effect of Phosphate on Growth and Yield of Tomato and Optimum Application Rate in Greenhouse

A field experiment was conducted to study the effect of Phosphate on growth and yield of tomato and the optimum application amount.The results showed that seedling stage,phosphate application significantly enhanced the increase in stem diameter and leaf area;while flowering leaf area and crown size difference was not significant.With the increase in P application rate,tomato plant height,stem diameter,chlorophyll a significant increase than the control,but no significant difference among treatments.With the growth of tomato plants to flowering vegetative and reproductive growth of the times,in different fertilization treatments in the tomato plant height,stem diameter,crown width,chlorophyll were significantly increased.Non significant effects of different potassium application rate on height,diameter of stem,leaf area,breadth of tress,as well as chlorophyll were observed.However,tomato yield was significantly affected by potassium application.The Yield of Tomato was increased along with increased phosphate application rate under 225 kg/hm2.Yet further increased phosphate led to decrease of tomato production.The maximum application rate of phosphate for tomato growth is 253.90 kg/hm2.The optimum application amount of it is 250.80 kg/hm2.