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Genotypic variation for potassium accumulation and utilization efficiency in barley under rainfed potassium stress conditions
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| Zeitschriftentitel: | Acta Agronomica Hungarica |
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| Personen und Körperschaften: | , , |
| In: | Acta Agronomica Hungarica, 51, 2003, 3, S. 267-280 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
Akademiai Kiado Zrt.
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| Schlagwörter: |
| Zusammenfassung: | <jats:p>A field experiment was carried out to study the effect of K nutrition and genotypic variation on the dry matter (DM) accumulation, and the K concentration, accumulation, uptake and utilization efficiency in barley (<jats:italic>Hordeum vulgare</jats:italic>L.). Successive increases in potassium nutrition had a significant effect on the dry matter and K accumulation either in the total or in various plant parts of barley at the tillering, stem elongation, heading and maturity growth stages. K nutrition also led to significantly higher grain yield with each unit K application than without K application. The yield increase due to K application was mainly due to the improvement in spike development from tillers. Dry matter and K accumulation in various plant parts varied significantly between genotypes at the main growth stages. Among the various plant parts, the stem contained the highest K concentration, had the highest K accumulation at maturity and changed considerably with the K level, while other plant parts remained relatively unchanged. Among the eleven genotypes, genotype 98-6 had the highest grain yield and the K use efficiency of this genotype was 10.4 kg grain per kg K applied. It could thus be used as a breeding line to breed barley varieties for higher productivity under rainfed conditions with low available soil potassium.</jats:p> |
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| Umfang: | 267-280 |
| ISSN: |
1588-2527
0238-0161 |
| DOI: | 10.1556/aagr.51.2003.3.4 |