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δ15N values of sorghum grains harvested on a Vertisol in the semi-arid tropics were positively related to doses of fertilizer N but negatively with the frequency of legume cultivation

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Relation http://oar.icrisat.org/6777/
http://dx.doi.org/10.1080/00380768.2001.10408406
 
Title δ15N values of sorghum grains harvested on a Vertisol in the semi-arid tropics were positively related to doses of fertilizer N but negatively with the frequency of legume cultivation
 
Creator Yoneyama, T
Engelaar, W M H G
Kim, H Y
Rupela, O P
 
Subject Sorghum
 
Description The relation between δ15N values of sorghum grains grown on Alfisol or Vertisol fields and the fields' cropping and N-fertilizer histories was investigated. Fields were cultivated with legumes or cereals at different frequencies for 10 y, prior to sowing of sorghum. During that period, the fields for study were amended with different N-fertilizers at rates ranging between 236 and 1,472 kg N ha-1. The δ15N values were markedly different between the two soil types. In the Vertisol fields, the grain δ15N values were positively correlated with the cereal-cropping frequency and amounts of applied fertilizers, but negatively correlated with the legume-cropping frequency. Such correlations were not observed in the Alfisol fields. It was concluded that only the amount of applied fertilizer influenced the δ15N values of sorghum grains, and that this effect was caused by the slight alkalinity of the Vertisol
 
Publisher Japanese Society of Soil Science and Plant Nutrition
 
Date 2001
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6777/1/SSPN_47_2_423-427_2001.pdf
Yoneyama, T and Engelaar, W M H G and Kim, H Y and Rupela, O P (2001) δ15N values of sorghum grains harvested on a Vertisol in the semi-arid tropics were positively related to doses of fertilizer N but negatively with the frequency of legume cultivation. Soil Science and Plant Nutrition, 47 (2). pp. 423-427. ISSN 0038-0768