Relationship Between Fruit Quality of Cherry Tomato and Soil Nutrient and Fertilizer Inputs in Hainan
[Objective]It aimed to study fruit quality of cherry tomato,fertilizer inputs and soil nutrient content in Hainan and their relationships,which provided theoretical basis for production of Hainan cherry tomato.[Method]Through method of survey combined with sampling and determination,40 representative fields from the main production area of cherry tomatoes in Hainan were chosen to study the fruit quality,soil nutrients and fertilizer inputs.[Result]There were great differences in quality of Hainan cherry tomatoes.The single fruit weight,transverse diameter,longitudinal diameter,firmness,soluble solid contents,vitamin C content,soluble sugar content,titratable acid content and sugar-acid ratio were respectively 5.22-20.10 g,19.72-30.21 mm,20.47-35.84 mm,1.20-3.90 kg/cm2,6.20%-10.00%,26.97-56.33 mg/100g,4.03%-7.60%,0.35%-0.68%and 7.79-19.19.The soil of main cherry tomato planting areas in Hainan ranged from weakly acidic to neutral.The content of organic matter,total nitrogen,exchangeable calcium and exchangeable magnesium were at low levels,while the available potassium content was at high level,and available phosphorous was at an extremely high level.The organic fertilizer input was seriously insufficient,but chemical fertilizer input was excessive,and the ratio of NPK fertilizer was unbalanced.There was extremely significantly positive correlation between soil organic matter content and fruit longitudinal diameter.The soil total nitrogen content showed significantly positive correlation with fruit transverse diameter and extremely significantly positive correlation with longitudinal diameter.The soil available phosphorus and available potassium content both were significantly positively correlated with fruit titratable acid.The extremely significantly positively correlations were observed between organic fertilizer input and single fruit weight,transverse diameter,longitudinal diameter.The total amount of chemical fertilizer and N input of chemical fertilizer both were negatively correlated with soluble sugar content.The chemical fertilizer(P2O5)input showed extremely significantly negative correlation with the fruit soluble sugar content and sugar-acid ratio of cherry tomato.[Conclusion]The main producing areas of cherry tomato in Hainan should increase the application of organic fertilizer,reduce the application amount of chemical fertilizer,and adjust the ratio of NPK nutrient input in Hainan,which are beneficial to improve the quality of cherry tomato.
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