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本研究通过对早熟马铃薯新品种“中薯三号”的商品薯和种薯生产进行密度试验和经济效益分析，旨在为北京二季作地区马铃薯早熟栽培尽早收获高产商品薯而提高经济效益，并在种薯生产中合理密植，提高繁殖系数，节约投资，增加收入提供依据。试验结果表明：在北京二季作地区，春季早熟商品薯生产密度为每亩４５００株时，商品薯产量最高，经济效益最好，比每亩３５００株和５６００株分别增收５．６４％和１．８９％。作种薯生产时，每亩５６００株密度的群体繁殖能力最强，亩产块茎数是多，可供５．５６亩商品薯生产用种，分别比每亩３５００株和５６００株的密度增加１．６５亩和０．７８亩，经济效益分别增加４２．２０％和１６．３２％。
In this study, the density test and economic benefit analysis of commercial potato and seed potato production in a new potato variety “Zhongshu No. 3” were carried out to improve the economic benefit of early harvesting of high yield commodity potato in the second season of Beijing. Reasonable close planting in the seed potato production, raising the breeding coefficient, saving investment, provide the basis for increasing income. The results showed that in the second season cropping area of Beijing, the production density of spring precocious potato products was 4500 per acre, the highest yield of potato products and the best economic benefit were 5.64% and 1,500 higher than 3500 and 5600 plants per acre respectively. 89%. For seed potato production, the population density of 5600 plants per acre had the strongest breeding ability, and the number of tubers per mu was more, which could be 5.56 mu for commercial potato production with a density increase of 1,500 and 5600 plants per acre, respectively .65 acres and 0.78 acres, the economic benefits increased by 42.20% and 16.32%.