Four microplant planting densities (PD) for greenhouse production of minitubers of three varieties were used to assess the agronomic and economic efficiencies of increased PD compared to the baseline density (63 microplants m⁻²). The field performance of minitubers was also included in the agronomic (yield formation) efficiency assessment of minitubers production. The concept of a field value (FV) of greenhouse area and of microplant was introduced. Economic assessment of PD changes was based on partial budget analysis and the marginal rate of return between PDs in ascending order. Agronomic efficiency assessment, as an efficient utilization of greenhouse space, revealed that the number of minitubers per m² increased gradually with increasing PD and the magnitude of the increase was up to 2.6 times between PD 63 and 184 microplants m⁻² making this PD the most effective of the studied. The change in minituber number per microplant due to the increased PDs was closely related to the economic efficiency assessment. In the baseline scenario (microplant cost of 0.54 € and minituber cost of 0.41 €), only the shift from PD63 to PD95 was efficient without trade-offs for only one of three varieties.

用于温室生产三个品种微型薯的四种微型植物种植密度 (PD) 用于评估与基线密度（63 微型植物 m ^-2）相比增加的 PD 的农艺和经济效率。微型薯的田间表现也包括在微型薯生产的农艺（产量形成）效率评估中。介绍了温室面积和微型植物场值（FV）的概念。PD变化的经济评估基于部分预算分析和PD之间的边际回报率升序排列。农艺效率评估，作为温室空间的有效利用，表明每平方米的微型薯数量^{2随着 PD 的增加逐渐增加，并且在 PD 63 和 184 个微型植物 m -2}之间增加的幅度高达 2.6 倍，这使得该 PD 成为研究中最有效的。由于 PD 的增加，每株微型薯数量的变化与经济效率评估密切相关。在基线情景中（微型植物成本为 0.54 欧元，微型薯成本为 0.41 欧元），只有从 PD63 到 PD95 的转变是有效的，而无需权衡三个品种中的一个。