Author： Opiyo A.M.
Publisher： IP Publishing Ltd
ISSN： 0030-7270
Source： Outlook on Agriculture, Vol.33, Iss.3, 2004-09, pp. : 209-214
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Abstract
Two experiments were carried out to investigate the effects of nitrogen application and plant age on edible leaf yield and anti-nutrient content of Solanum nigrum plants. Nitrogen rates were 0, 26, 52, 78 and 104 kg ha–1, applied in one, two or three applications. Shoots were harvested fortnightly starting at eight weeks up to 20 weeks after transplanting. Edible leaf yield increased with both increasing nitrogen application rates and plant age. Plant age significantly affected the oxalate content. In Experiment 1, oxalate content decreased with plant age between eight weeks and 20 weeks after transplanting. In Experiment 2, the oxalate content increased between eight and 12 weeks after transplanting; but from 16 weeks, it declined with increasing plant age.
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