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Under fi eld conditions,an experiment was conducted to study the effects of ammonifi cation bacteria,potassium bacteria and phosphorus bacteria on nutrient availability in soil and yield of rice in the cold region of China and compared to the conventional fertilization.Results showed that DF1P2 treatment(ammonifi ers 1.5×10~8 cfu·m~(-2),phosphorus bacteria 1.5×10~8 cfu·m~(-2),and potassium bacteria 1.5×10~8 cfu·m~(-2))increased available nutrient concentrations in soil,increased the concentrations of N,P,and K in plant organs and increased the rice yield and was the most signifi cantly among all the treatments.This treatment could be recommended as the best suitable biological fertilizer application rate for the rice production in the cold region of China.
Under fi eld conditions, an experiment was conducted to study the effects of ammonifi cation bacteria, potassium bacteria and phosphorus bacteria on nutrient availability in soil and yield of rice in the cold region of China and compared to the conventional fertilization. Results showed that that DF1P2 treatment (ammonifi ers 1.5 × 10-8 cfu · m -2, phosphorus bacteria 1.5 × 10-8 cfu · m -2, and potassium bacteria 1.5 × 10-8 cfu · m -2) increased available nutrient concentrations in soil, increased the concentrations of N, P, and K in plant organs and increased the rice yield and was the most signifi cantly among all the treatments. This treatment could be recommended as the best suitable biological fertilizer application rate for the rice production in the cold region of China.