Effect of wheat and barley varietal differences in nitrate concentration on plant analysis interpretation

Papastylianou, I.

doi:10.1007/bf01048915

Cited by 2 publications

(2 citation statements)

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“…At the tillering stage, wheat stem NO3-N concentration of less than 4000 μg/g dry matter was found to be insufficient for maximum grain yield, while 4000 to 6000 ug/g was intermediate, 6000 to 10000 ug/g sufficient, and above 10000 ug/g dry matter excessive [5]. These standards can be applied to both wheat and barley, with differences among cultivars in N0 3 concentration not being critical considerations [3]. In these studies, laboratory facilities were used to analyse plant tissues for N0 3 concentration .…”

Section: Diagnosing Nitrogen Fertilization Requirements Of Cereals Inmentioning

confidence: 91%

Diagnosing nitrogen fertilization requirements of cereals in less than 30 seconds

Papastylianou

1989

Communications in Soil Science and Plant Analysis

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Stems of barley and wheat plants of wide range innutritional status were analysed for sap ΝΟ 3 concentration at the tillering stage using both "Merckoquant" nitrate test strips and a specific-ion nitrate electrode. Even though the "Merckoquanf'test strips used in this study did not give precise NO 3 readings they were found to be a satisfactory method for determining the NO 3 content of stems of cereals, and can be used in situ by farmers to predict the necessity of Ν fertilization for maximum grain yield.If the NO 3 sensitive area on the test strip is coloured to match the standard 500 ppm NO 3 colour in less than 30 seconds, after the application of sap, this is an indication of adequate Ν nutrition. If the 500 ppm NO 3 colour standard is reached between 30 to 60 seconds, then this is an indication of intermediate Ν nutrition and fertilization is recommended only under favorable weather conditions. If colour development of the test strip for the 500 ppm N0 3 standard takes more than 60 seconds, or the colour developed does not reach this standard, this

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Section: Diagnosing Nitrogen Fertilization Requirements Of Cereals Inmentioning

confidence: 91%

Diagnosing nitrogen fertilization requirements of cereals in less than 30 seconds

Papastylianou

1989

Communications in Soil Science and Plant Analysis

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“…This is supported by Papastylianou (1987), who pointed out that varietal differences are not a critical consideration in the interpretation of prognostic standards set up for genotypes adjusted under certain environmental conditions.…”

Section: Downloaded By [University Of Chicago Library] At 13:28 26 Dementioning

confidence: 92%

Determination of Nitrogen Status in Winter Wheat by Measuring Basal Stem Tissue Sap Nitrate Concentration

Hoel¹

1999

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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The aim of this study was to assess a quick-test method determining nitrate in basal stem tissue sap for the prediction of nitrogen status in winter wheat (Triticum aesti6um L.). The nitrate content in plant stem tissue sap collected at Zadoks growth stages GS 31 and GS 49 of winter wheat in 11 annual field trials in south-east Norway in the years 1993-96 was measured with Merckoquant test strips with a Nitracheck Meter. Relationships between NO 3 − concentrations and final yields were good within individual trials, but when the results from all trials were pooled, the NO 3 − concentration was a poor predictor of final yields. This study suggests that the critical nitrate values required in plant stem sap for sufficient grain protein content for bread-baking quality are 4000 ppm NO 3 − at GS 31 and 2000 ppm at GS 49 in situations with a single N application in the spring. In situations with split N applications (25 kg N ha − 1 at GS 31 and 25 kg N ha − 1 at GS 49 in addition to spring application), 1000 and 500 ppm were found to be the critical values at GS 31 and 49, respectively. Because of the large between-site and between-year variability, this study does not indicate that the method can be recommended for extended practical use.

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Effect of wheat and barley varietal differences in nitrate concentration on plant analysis interpretation

Cited by 2 publications

References 10 publications

Diagnosing nitrogen fertilization requirements of cereals in less than 30 seconds

Diagnosing nitrogen fertilization requirements of cereals in less than 30 seconds

Determination of Nitrogen Status in Winter Wheat by Measuring Basal Stem Tissue Sap Nitrate Concentration

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