陇中半干旱地区马铃薯经济产量及效益模式探讨

Discussion on the Economical Yield and Benefit Model of Potatoes in Semiarid Area in the Middle Part of Gansu Province

采用二次饱和 D 最优设计方法,通过1986～1987两年四个试验,探讨了陇中半干旱地区马铃薯经济产量与播种密度,纯氮、纯磷之间的栽培关系,并通过经济产量和效益模式的建立和分析,基本明确了在该区以高产和高利润为目的时,播种密度、纯氮、纯磷的适宜用量,为大田生产提供了科学依据。

The quadratic saturated D-optimum designing method was adopted in con-ducting four experiments in two years from 1986 to 1987 to discuss the culti-vation relationships of potatoes among economibal yields and seeding density,pure nitrogen and pure phosphorus in semiarid area in the middle part ofGansu Province,It was made clear through the establisment and analysis ofeconomical and benefit model that seeding density and optimum amount ofpure nitrogen and pure phosphorus provided the scientific basis for the fieldproduction with the main objectives of achieving high yield and maximumeconomic returns.