Application Effect of Organic Fertilizers Substituting for Chemical Fertilizers in Strawberry Planting
In order to improve the quality of strawberry and the quality of cultivated land,the application effect of organic fertilizers substituting for chemical fertilizers in strawberry planting was discussed from the perspective of chemical fertilizer reduction.The experiment of different ratios(20％,40％,60％,80％,100％)of organic fertilizers substituting for chemical fertilizer was designed by taking strawberry'Hongyan'as experimental material and using no fertilization and full chemical fertilization as controls.By analyzing the effects of different treatments on yield and its components of strawberry,fruit quality and physicochemical properties of soil,the preliminary quantitative indicators of chemical fertilizers reduction and organic fertilizers substituting for chemical fertilizers were discussed.The results showed that organic fertilizers substituting for chemical fertilizers could improve the physicochemical properties of soil and the quality of strawberry,and the effect of treatment with organic fertilizers substituting for 100％chemical fertilizers was better,organic matter content,ammonium nitrogen content,total numbers of fungi of the soil and vitamin C content,sugar content and sugar-acid ratio of fruit were the highest with 26.2 g/kg,14.81 mg/kg,3.72 ×109 fungi/g,741.8 mg/kg,63.2 g/kg,6.60,respectively,which increased by 55.0％,18.7％,67.6％,25.8％,6.9％,3.9％compared with the control of no fertilizer,respectively,and increased by 56.0％,15.2％,85.1％,15.7％,10.1％,12.8％compared with the control of full chemical fertilizers,respectively.While contents of nitrate and titratable acid in fruit were lower,decreased by 11.8％and 2.4％compared with the control of full chemical fertilizers,respectively.The yield of strawberry treated with the group of organic fertilizers substituting for chemical fertilizers were extremely and significantly higher than that of the control of no fertilizer,and showed a trend of increasing first and then decreasing with the increase of organic fertilizer amounts.The yield of strawberry treated with organic fertilizers substituting for 60％chemical fertilizers+40％chemical fertilizers was the highest,which was 3 399.46 kg per 667 m2 and extremely and significantly increased by 65.08％and 9.71％compared with the control of no fertilizer and the control of full chemical fertilizers,respectively,while the fruit number per plant and single fruit weight were all the highest with 16.54 fruits and 24.93 g,respectively,increased by 32.2％and 22.7％compared with the control of no fertilizer,and increased by 3.9％and 3.0％compared with the control of full chemical fertilizers,respectively.In conclusion,appropriate amounts of organic fertilizers combined with chemical fertilizers could promote the improvement of the yield and quality of strawberry,and the quality of cultivated land.In order to improve the soil physicochemical properties and fruit quality in strawberry planting,organic fertilizers could be used to substitute for 100％chemical fertilizers to reduce the amounts of chemical fertilizer,however,for the purpose of increasing yield,the measure of organic fertilizers substituting for 60％chemical fertilizers+40％chemical fertilizers could be used.
strawberryqualitycommercial organic fertilizerfertilizer reduction and efficiency improvementyieldsoil microorganismphysicochemical property
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