Research on the effect of different slow-release fertilizers on the growth of cherry tomato plants and nutrient properties of the substrate
To investigate the nutrient release pattern of different slow-release fertilizers and their effects on the growth of cherry tomato plants,fruit quality,and nutrients in the substrate,this experiment was conducted with conventional water-soluble fertilizers as a control,and treated with coated slow-release fertilizer(H1),phosphate organic slow-release fertilizer(H2)and phosphate inorganic slow-release fertilizer(H3). To analyze the nutrient release pattern of different types of slow-release fertilizers,a soil column leaching test was performed. The results showed that three slow-release fertilizers significantly slowed down the release of available nutrients. The nitrogen release rate of coated slow-release fertilizer(H1)was lower than that of other slow-release fertilizers before 15 days,but it was consistent with that of phosphate organic slow-release fertilizer(H2)after 60 days,and the release rate reached the maximum after 80 days. To investigate the impact of different slow-release fertilizers on the growth of cherry tomatoes,a field pot experiment was conducted. The slow-release fertilizer were more suitable for the growth and development of tomato. The results showed that the application of three slow-release fertilizers could significantly increase the content of available nitrogen,available phospho-rus and available potassium in the matrix. The content of available nitrogen,available potassium and available phosphorus in H1 and H2 were significantly higher than those in H3 treatment,and the content of available nutrients in H2 treatment was lower than that in H1 treatment. Compared to the control,the three slow-release fertilizers obviously increased the content of vitamin C,soluble sugar,soluble solids,and the sugar-acid ratio of tomato,and the soluble sugar content have been elevated by 21.30％,19.73％,and 14.27％,respectively. What's more,they promoted tomato plant growth and in-creased yield by 31.03％,20.13％,and 21.69％,respectively. Correlation analysis showed that the content of available ni-trogen and available potassium in the substrate were significantly positively correlated with the stem diameter,leaf area and soluble sugar content of tomato. As indicated by principal component analysis,the composite score of each slow-re-lease fertilizer was higher than that of the control,and the comprehensive performance of coated slow-release fertilizer was better than others. In conclusion,using slow-release fertilizers can effectively guarantee the efficient use of nutrients in the growth of bunch cherry tomatoes,and the film-encapsulated slow-release fertilizers are more suitable for the vegeta-tive growth of bunch string-harvested plants and the formation of fruit quality.
万方数据
维普
