Abstract: To investigate the effects of organic and inorganic fertilizers on yield and soil nutrient content in protected cultivation.Under the condition of facility cultivation, tomato field experiments were conducted to study the effect of the yield and soil nutrient content when reduced organic and inorganic fertilizers and combined the both application.Compared with the traditional organic fertilizer application amount of 105.00×10³ kg/ha, organic and inorganic combined application increased the yield by 12.99%, and the total fertilization of tomato could be reduced by 25% and 50%, it can make the yield of tomato was increased by 8.55% and 8.84%, when inorganic fertilizer was reduced to 50%, the yield decreased significantly.In the middle growth of tomato, there was no significantly difference between each treatments, but compared with the traditional application of organic fertilizer and when the organic fertilizer reduced 25%, organic matter content, total nitrogen content, available potassium content in soil respectively increased by 1.41%, 2.64%, 10.34%;after the harvest of tomato, soil nutrient content decreased with the amount of fertilizer decreased, no significant difference;Compared with the middle growth of tomato, the nitrate nitrogen content in the 0-20 cm and 20-40 cm soils treat with organic and inorganic fertilizers increased from 67.33 mg/kg and 28.93 mg/kg to 90.95 mg/kg and 40.66 mg/kg, respectively, and the nitrate nitrogen content in the 40-60 cm soils decreased from 21.40 mg/kg to 14.97 mg/kg, while the nitrate nitrogen content in the 60-80 cm and 80-100 cm soil layers was basically the same; in all treatments after harvest, with the reduction of nitrogen application rate, the accumulation of nitrate in soil and leaching risk both decreased.Compared with the traditional organic fertilizer application amount of 105.00×10³ kg/ha, the local tomato fertilizer amount can be reduced by 25%-50%, and the appropriate use of organic fertilizers, which can not only make the tomato yield slightly and reducing nitrate leaching risk of soil, also can make the soil nutrient content is more suitable for crop growth and maintain soil productivity.

Key words: Tomato, Fertilizer reduction, Protected cultivation, Yield, Soil nutrient content

CLC Number: 

• S158