Effects Of Controlled-Release Bulk Blending Fertilizer On The Growth, Yield And Quality Of Tomato

According to the low efficiency of fertilizer utilization, the maladjusted soil nutrients, poor product quality and environmental pollution in the greenhouse vegetable culture, Tomato was used as test material, the experiment of tomato fertilizition in pot was conducted by applying the controlled-release bulk blending fertilizer and common fertilizers with the growth, yield and quality of tomato. The findings provided a theoretic support basis for improving the processing of tomato production, and exploring the intensive utilization of CRFs. The research results were as follows:1. The variation trends of the plant height and stem diameter in all treatments were consistent in the early growth period of tomato. There was no obvious difference of every treatment. Having increased the height and stem diameter, enhanced the root absorption capacity of tomato about 90 days after field setting. Compared with blank treatment (no fertilizing, T1) and common fertilizers(T2), with the treatments of 20% decrement of controlled-release bulk blending fertilizer (T4), under 30% decrement of nitrogen controlled-release bulk blending fertilizer (T6), the plant height, stem diameter and the FW of root and stem and leaf of tomato were increased significantly.2. With the treatments of 20% decrement of controlled-release bulk blending fertilizer (T4), reduced by 30% decrement of nitrogen controlled-release bulk blending fertilizer (T6), the physiological indexes were increased significantly than treatments with common fertilizers (T2) and blank treatment (T1). Under 30% decrement of nitrogen controlled-release bulk blending fertilizer (T6), NR activity increased significantly than other treatments at full fruit period. With the controlled-release bulk blending fertilizer T3, T4, T6, the total content of chlorophyll and Pn were greatly improved than common fertilizers (T2) and blank treatment (T1).3. Compared with common fertilizers (T2), effects of the treatment of controlled-release bulk blending fertilizer on changes significantly of soil nutrients content. With the controlled-release bulk blending fertilizer, soil nutrients remained at relatively high level, it is beneficial to improve the growth of tomato. Compared with T2, the plant total nitrogen, phosphorus, potassium content increased. The Porosity of soil was increased significantly under controlled-release bulk blending fertilizer. With the treatments controlled-release bulk blending fertilizer, bulk density was decreased relative to T1, T2. Controlled-release bulk blending fertilizer treatments increased invertase activity of soil and they were beneficial to improving soil microbial flora. Soil changed from bacteria type to fungi type significantly.4. The yield under T3, T4 and T6 respectively increased by 26.6%, 23.1%, 25.2%, relative to T2. Controlled-release bulk blending fertilizer treatments increased Lycopene, ratio of sugar and acid, Vc content and decreased nitrate content. Lycopene content under T3 was highest. Vc content and Soluble sugar content under T6 was highest. In conclusion, evaluation on improved effect of the fruit quality, the project of 30% decrement of nitrogen controlled-release bulk blending fertilizer (T6) is optimal.