Effects of Chemical Fertilizer Reduction Combined with Humic Acid and De-composing Agent on Growth and Nutrient Absorption of Maize
Chemical Fertilizer reduction combined with humic acid fertilizer is an effective pathway to alleviate soil fertility decline and increase fertilizer utilization rate,which is great significant to improve soil quality and ecosys-tem.In this paper,1/2 total fertilizer(1/2CF),3/4 total fertilizer(3/4CF)and total fertilizer(CF)were applied with 0 mg/kg humic acid(HA0),250 mg/kg humic acid(HA250),500 mg/kg humic acid(HA500)and 0 mg/kg and 100 mg/kg decomposing agent on dry matter quality and nutrient content of maize plant at jointing stage and tasseling stage re-spectively in order to provide reference for establishing technical model of chemical fertilizer reduction in the black soil region of Songnen Plain.The results showed that dry weight of(CF+V0HA250)and(1/2CF+V100HA0)increased sig-nificantly by 13.4％-220.1％and 13.2％-94.4％compared with other treatments at jointing stage.Dry weight of(CF+V0HA250)and(3/4CF+V100HA0)increased significantly by 27.9％-181.0％and 11.5％-82.2％compared with other treatments at tasseling stage.Total nitrogen,total phosphorus and total potassium contents of(CF+V0HA0),(3/4CF+V0HA250)and(CF+V100HA500)were relatively high at jointing stage,total nitrogen content of(1/2CF+V0HA250)treatment was significantly higher than other treatments,and total phosphorus content of(CF+V100HA500)treatment was significantly higher than other treatments,and the total potassium content of(3/4CF+V100HA0)treatment was sig-nificantly higher than that of other treatments at tasseling stage.By comprehensive analysis,(CF+V0HA250)and(1/2CF+V100HA0)could be considered as suitable complementary measures for the application of chemical fertilizer in the meadow black soil area on Songnen Plain in this study.
Chemical fertilizerDecomposing agentHumic acidNutrient absorptionMaize
NETL
NSTL
万方数据
