| Popis: |
【Objective】This study was conducted to investigate the effects of chemical fertilizer reduction combined with synergist on soil physicochemical properties, yield and quality of Chinese flowering cabbage in Huizhou, Guangdong Province, so as to provide a theoretical basis and technical support for chemical fertilizer reduction in vegetable fields.【Method】Taking the representative vegetable crop Chinese flowering cabbage in South China as the research object, four treatments of local fertilization level (T1, CK), local fertilization level+ synergist application (T2), 20% fertilizer reduction (T3) and 20% fertilizer reduction + synergist application (T4) were set up by field plot experiment. Soil physicochemical properties, microbial biomass, acid phosphatase activity, and crop yield and quality were measured and compared between treatments.【Result】The results showed that compared to T1 (CK), the soil capillary capacity, field capacity, non-capillary porosity, and total porosity in T3 treatment were increased by 13.3%, 43.1%, 29.4%, and 9.2%, respectively, and the soil non-capillary porosity and total porosity of T4 treatment were increased by 42.1% and 13.0%, respectively. Compared to T1 (CK), the soil pH value in T3 treatment was increased by 15.9%, whereas the other soil fertility indexes were not changed significantly. Under T4 treatment, soil pH value was increased by 13.4%, soil alkali-hydrolyzable nitrogen and available potassium contents were significantly increased by 33.3% and 15.8%, respectively. Compared to T1 (CK), the soil microbial biomass C (SMBC) and N (SMBN) contents and acid phosphatase activity in T3 treatment were increased by 35.6%, 43.1%, and 15.5%, respectively, whereas the SMBC, SMBN, and soil microbial biomass P (SMBP) contents and acid phosphatase activity in T4 treatment were increased by 78.1%, 111.2%, 49.1%, and 24.3%, respectively. Compared to T1 (CK), the N, P, and K absorption amounts of cabbage in T3 treatment were increased by 22.1%, 11.3%, and 17.9%, respectively, whereas those in T4 treatment were significantly increased by 33.0%, 28.5%, and 30.0%, respectively. Compared to T1 (CK), cabbage yield was increased by 19.4%, nitrate content was decreased by 13.6%, and Vc content was increased by 2.2% in T3 treatment. Cabbage yield was significantly increased by 28.1%, nitrate content was decreased by 12.1%, and Vc content was increased by 4.2% in T4 treatment.【Conclusion】Chemical fertilizer reduction combined with synergist application can increase soil fertility, microbial biomass and acid phosphatase activity, improve cabbage yield and quality. |
