NITROGEN FERTILIZER EFFECTS ON GROWTH AND YIELD OF SWEETPOTATO

NITROGEN FERTILIZER EFFECTS ON GROWTH AND YIELD OF SWEETPOTATO

Nitrogen effects on `Beauregard' sweetpotato were investigated from 1992 to 1995 at the LSU Sweet Potato Research Station to determine the optimal rate and timing of nitrogen application. Five rates of preplant nitrogen were applied: 0, 33.6, 50.4, 67.2, and 84 kg·ha –1 . Increasing the rate of...

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Bibliographic Details
Published in:HortScience Vol. 31; no. 5; p. 759
Main Authors: Jett, Lewis W, Mulkey, W.A
Format: Journal Article
Language:English
Published: 01-09-1996
Online Access:Get full text
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Summary:Nitrogen effects on `Beauregard' sweetpotato were investigated from 1992 to 1995 at the LSU Sweet Potato Research Station to determine the optimal rate and timing of nitrogen application. Five rates of preplant nitrogen were applied: 0, 33.6, 50.4, 67.2, and 84 kg·ha –1 . Increasing the rate of nitrogen to 50.4 kg·ha –1 significantly increased marketable yield. Five treatments of pretransplant/sidedress nitrogen (kg·ha –1 ) were applied: 0/0, 50.4/0, 0/50.4, 33.6/16.8, and 16.8/33.6. Withholding nitrogen resulted in significantly more storage root initiation 21 days after transplanting (DAT). Application of 50.4 kg N/ha 21 DAT resulted in significantly greater yields of US #1 sweetpotatoes in 1992 and 1995 and equaled the pretransplant nitrogen treatment in 1993 and 1994.
ISSN:0018-5345
2327-9834
DOI:10.21273/HORTSCI.31.5.759e