Effect of supplemental nitrogen on true potato seed weight View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1987-09

AUTHORS

N. Pallais, S. Villagarcia, N. Fong, J. Tapia, R. Garcia

ABSTRACT

The effect on true potato seed (TPS) weight of supplemental nitrogen (N) applied during seed development was investigated using crosses DTO-33 × R128.6 (“A” produced in the field) and Atzimba × R128.6 (“B” produced in the field and in a screenhouse). Dry weights of tops and tubers of the mother plants were also measured in the screenhouse.The response to supplemental N (0-240 kg/ha) in 100-TPS weight of cross A and B from the field was positive and linear. In the screenhouse, where higher total N (0-1200 kg/ha) was applied, the responses in 100-TPS weight and dry weight of tops and tubers were curvilinear, with maximum levels at 800, 1000 and 400 kg/ha, respectively. The 100-TPS weight of cross B was 40% higher in the field than in the screenhouse. In the field, increased frequency of supplemental N applications increased 100-TPS weight of large and medium berries of cross B, but had no effect on seed from small berries nor on seed from any berries of cross A. In the screenhouse, increased application frequency decreased tuber dry weight and increased dry weight of tops, but had no effect on 100-TPS weight. It was concluded that supplemental N must be applied during seed development and at higher total levels than those required for optimum tuber yields in order to maximize 100-TPS weight. The lower seed weight from the screenhouse suggests that other environmental factors (e.g., temperature) present during growth of the mother plant can affect the weight of the resultant TPS. More... »

PAGES

483-491

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02853716

DOI

http://dx.doi.org/10.1007/bf02853716

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1034645690


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