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Critical nitrogen dilution curve and nitrogen nutrition index for jute mallow (Corchorus olitorius L.) In southern Benin

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Title Critical nitrogen dilution curve and nitrogen nutrition index for jute mallow (Corchorus olitorius L.) In southern Benin
 
Creator Huat, J.
Touré, A.
Tanaka, A.
Amadji, G.
 
Subject jute mallow
nutrition
nitrogen
benin
 
Description Indigenous crops, such as jute mallow (Corchorus olitorius L.) have high potential for improving nutrient efficiency and income source diversification of farmers in sub-Saharan Africa. A better understanding of plant responses to nitrogen (N) is essential in shedding light on the trend towards increasing fertilizer applications for commercially grown jute mallow. The aim of this study was to determine the critical N dilution curve in order to assess the N nutrition index (NNI) in jute mallow in southern Benin. Above-ground dry matter (DM) and N concentration were determined weekly during the 2010 and 2011 growing seasons and six N treatments of 0, 30, 60, 120, 180 or 240 kg N ha−1 were tested under irrigated conditions. A critical N curve (Nc = 3.35 W−0.18), where W is the DM in Mg per ha, was plotted based on the N concentration in the whole plant. The critical N concentration (Nc) represents the minimal N concentration required to achieve maximum growth. According to significant differences in DM at each sampling date, data points were divided into two groups representing either N deficient or N excess conditions. All data points in the N deficient group were under the critical N curve and most data points in the N excess group were on or above the critical N curve, therefore confirming the validity of the critical N curve determined in southern Benin. The NNI calculated as the ratio between the measured N concentration and predicted Nc, ranged from 0.55 to 1.30. The equation for the critical N curve and NNI determined in this study for jute mallow could potentially be used as a parameter for N application under non-deficient water conditions in southern Benin.
 
Date 2018-08
2019-07-02T14:56:57Z
2019-07-02T14:56:57Z
 
Type Journal Article
 
Identifier Huat, J., Toure, A., Tanaka, A., and Amadji, G. 2018. Critical nitrogen dilution curve and nitrogen nutrition index for jute mallow (Corchorus olitorius L.) In southern Benin. Experimental Agriculture 54(4):549-562.
0014-4797
1469-4441
https://hdl.handle.net/10568/102024
https://doi.org/10.1017/S0014479717000230
 
Language en
 
Rights Copyrighted; all rights reserved
Limited Access
 
Format p. 549-562
 
Publisher Cambridge University Press
 
Source Experimental Agriculture