内蒙古后山半干旱区马铃薯丰产高效综合农艺措施数学模型研究

Research on the Mathematical Model of Potato with Comprehenslvei Agronomic Measures for High Yield and Efficiency in Semiarid Region in North Part of the Yin Mountain in Inner Mongolia

采用二次通用旋转组合设计，通过１９９２年多点重复试验，研究了内蒙古后山半干旱偏旱区马铃薯经济产量与密度、碳铵施量和播期之间的关系及交互效应，并建立了块茎产量；商品薯率的数学模型。结果表明，各因素影响马铃薯块茎产量的顺序是密度＞播期＞施肥量。基本明确了在该区以丰产高效和高商品薯率为不同目的时，种植密度、碳铵施量和播期的最优组合，为大田生产提供了科学依据。

The binary univeral rotationary combination design was adopted to study theeconomic yield and density of potatoes,relationship between the applied rate ofNH4HCO3 and sowing time ad reciprocal effects of potatoes throung 1992 multiple- pointrepeated experiments thereby to establish the mathematical model of tuber yields andmarketing potato rate.The results indicated that the sequences of each factor affectingpotato yields can be denity>sowing time>the amount of fertilizer application. It wasmade clear through the establishment and analysis of potato tuber yields and marketingtuber rate that the optimal combination of sowing density,the amount of NH4HCO3 ap- plied,and sowing time provided the scientific basis for the field production with the dif-ferent objectives of achieving high tuber yield and high marketing tuber rate.