粉煤灰包膜缓释肥的制备及其对作物生长的影响研究-植物营养学专业论文.docxVIP

PAGE PAGE 4 粉煤灰包膜缓释肥的制备及其对作物生长的影响研究 transpiration rate and stomatal conductance and decreased stomatal limitation (Ls) in the leaves of the plant during its late growth stage, and improved the plant parameter characteristics, and biomass per head by 0.10～0.33 kg, yied by 9.72%～33.1%. In addition, the coated controlled release fertilizers decreased NO3--N significantly and organic acid contents by a certain extent in the functional leaves of the plant, and improved sugar-acid ratio and soluble sugar and Vc contents of the head of the plant at the harvest stage. New dual-release coated slow release fertilizer was made through adding the nitrification inhibitor to fly ash, and further studies on soil nutrient content and its enzyme activity. The results showed that the homemade coated slow release fertilizer with the addition of nitrification inhibitors, which were 1%, 2% and 4% improved soil pH, and increased soil EC, NH4+-N, available P and K content, and decreased NO3--N content at maize growth stage. The three kinds of homemade slow release fertilizer also enhanced urease activity and acid phosphatase activity by a certain extent, but there was no significant difference in catalase activity among the six treatments. In the summary, the treatment by adding 4% nitrification inhibitors improved the soil nutrient content and activity best. We further studied the effect of the homemade coated slow release fertilizer on the growth effect of maize in the field. The results showed: compared with ordinary compound fertilizer, the three kinds of fertilizer significantly improved the performance of maize photosynthesis and chlorophyll fluorescence; improved maize SOD, POD and CAT activity and soluble protein content; significantly improved the agronomic traits of maize, increased maize starch, protein and vitamin C content at late stage. In addition, compared with ordinary fertilizer, the three kinds of homemade slow release fertilizer increased maize grain yi