Abstract:

To explore the effects of different formulas of bio-organic fertilizer application and application rate on the improvement of coastal saline-alkali soil and the yield of dryland maize, a field trial was designed for the coastal saline-alkali land test area in Zhanhua District, Binzhou City. Formula A (Potassium fulvate and chicken manure fermentation materials), formula B (desulfurization gypsum and cellulose-acrylamide raw materials), and formula C (humic acid and edible fungus residue) were set up. A control was set with base fertilizer. The yield, free proline content of leaf and aboveground crop biomass of saline-alkali field maize were tested. The results showed that the average yield of Formula A, Formula B and Formula C increased by 8.13%, 7.37% and 10.16%, respectively. Formula C had the most significant effect on the increase of maize yield. The content of free proline in maize leaves decreased by 30.15%, 26.37% and 45% compared with that of the control, indicating that the ability of salt and alkali stress resistance of maize was enhanced. Formula C was applied to the test field, in 2017, the aboveground biomass of crop increased by 15.4%, and in 2018, it increased by 21.1%, showing that the formula had obvious promotion for crop growth. In summary, the synergistic effect between the eutrophic acid, desulfurization gypsum and microbial materials has a good improvement effect on the coastal saline-alkali land.

Key words: Saline-alkali Soil, Humic Acid, Amelioration, Organic Fertilizer, Summer Corn