Concentrations of total nitrogen in squash, cucumber and melon in relation to growth, and to a piper‐steenbjerg effect
作者:
AdelM. El‐Sheikh,
T. C. Broyer,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1970)
卷期:
Volume 1,
issue 4
页码: 213-219
ISSN:0010-3624
年代: 1970
DOI:10.1080/00103627009366260
出版商: Taylor & Francis Group
关键词: “total‐N”; concentrations;squash;cucumber;melon;critical levels;Piper‐Steenbjerg effect
数据来源: Taylor
摘要:
Squash (Cucurbita pepo), cucumber (Cucranis sativus), and sweet melon (Cucumis dudain) were grown in sand cultures with N supply concentrations as the variable. For several reasons, total‐N values were found to be less satisfactory than NO ‐N for the purpose of determining the critical nitrogen concentration for maximum growth. Concentrations of total‐N in mature petioles were higher in plants severely deficient in N than in less deficient plants, characteristic of a Piper‐Steenbjerg effect.
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