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[目的]研究半夏高产高效栽培施肥模型,为科学利用沼渣、沼液,保护环境提供理论依据。[方法]采用二次回归旋转组合设计,研究了在中等肥力土地上,施用沼渣、N、P、K对半夏产量和经济效益的影响,建立相应的回归方程,提出了2套半夏高产高效栽培施肥模型。[结果]2套半夏高产高效栽培施肥模型为:产投比高于3.8,纯收入高于18万元/hm2时,施用沼渣肥23 955.50～40 917.62 kg/hm2,尿素153.66～312.39 kg/hm2,普钙2 757.24～3 812.85 kg/hm2,硫酸钾162.00～664.80 kg/hm2;产投比高于4.0,纯收入高于18万元/hm2时,施用沼渣肥21 275.16～43 917.99 kg/hm2,尿素260.91～334.23 kg/hm2,普钙2 514.15～3 822.84 kg/hm2,硫酸钾111.60～742.80 kg/hm2。[结论]通过该试验建立的成本、产投比、纯收入与沼渣、N、P、K施用量间关系的数学模型,完全符合半夏的生长发育规律,可以用于生产实践。
[Objective] The research aimed to study the high yield and high efficiency cultivation and fertilization model of Pinellia ternata and provide theoretical basis for scientific utilization of biogas residue and biogas slurry and environmental protection. [Method] The quadratic regression rotation combination design was used to study the effect of biogas residue, N, P, K on the yield and economic benefits of Pinellia ternata on medium fertility land. The corresponding regression equations were established and two sets of Pinellia ternata High Yield and Efficient Cultivation Fertilization Model. [Result] The results showed that: 2 sets of high yield and high efficiency cultivation and fertilization model of Pinellia ternata were as follows: production-input ratio was higher than 3.8 and net income was higher than 180,000 yuan / hm2, biogas residue fertilizer was 23,955.50-40,617.62 kg / hm2, urea was 153.66-312.39 kg / hm2, total calcium 2 757.24 ~ 3 812.85 kg / hm2, and potassium sulfate 162.00 ~ 664.80 kg / hm2. When biogas production rate is higher than 4.0 and net income is higher than 180,000 yuan / hm2, biogas residue fertilizers 21 275.16 ~ 43 917.99 kg / hm2, urea 260.91 ~ 334.23 kg / hm2, total calcium 2 514.15 ~ 3822.84 kg / hm2, potassium sulfate 111.60 ~ 742.80 kg / hm2. [Conclusion] The mathematic model of the relationship between cost, production-to-output ratio, net income and biogas residue, N, P and K application rates established in this experiment fully accords with the law of growth and development of Pinellia ternata and can be used in production practice.