Effects of Different Fertilizer Rates on the Growth of Tomato Seedlings

【Objective】 When the original tomato matrix formula was adopted in Hetian region of Xinjiang,different levels of nitrogen, phosphorus and potash fertilizer were applied to cultivate tomato seedlings. 【Method】 Tomato 'ouguan' as the test material,adopt the method of raising seedlings with acupoints and plates,coconut bran, sand and organic fertilizer（20:1:1） were used as the basic matrix,One control and five different treatments were set with different fertilizer inputs,make sure all other conditions are consistent,plant height, stem diameter, maximum leaf area, fresh weight, dry weight, root length, root volume, soluble sugar, soluble protein and chlorophyll were determined.The effects of different fertilizer rates on growth and physiological and biochemical indexes of tomato seedlings were compared. In order to provide theoretical basis for cultivating high quality tomato seedlings in Hetian area. 【Result】 All treatments had different effects on tomato seedlings, among which T₂ treatment had the largest leaf area was 21.29 cm². T₄ treatment has the highest fresh weight of the above-ground part, which was 4.23 g. The fresh weight of the underground part in T₂ and T₄ treatments was 0.78 g, which was higher than that of the control. T₂ treatment had the longest root length was 15.54 cm; The dry weight of underground part under T₄ treatment is the highest, which was 0.08 g. The value of root volume in T₂ treatment was the highest, which was 6.17 cm³. The root-shoot ratio of T₁, T₃ and T₄ was 0.19. T₄ treatment had the highest seedling index（0.19）. T₄ treatment had the highest G value, is 0.013. T₂ treatment had the highest soluble sugar content and soluble protein content, which were 8.15 mg/g and 11.88 mg/g, respectively. T₂ treatment had the highest total chlorophyll content, which was 1.78 mg/g. T₄ treatment was followed by 1.72 mg/g. 【Conclusion】 T₄（nitrogen-phosphate-potassium content of 100,20 and 100 g/m³） fertilizer was more beneficial to the growth of tomato seedlings.It is recommended as fertilizer formula for tomato seedling in Hetian region of Xinjiang.