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Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature
Dissertation (PhD)--University of Pretoria, 2003.
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University of Pretoria
2013
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| _version_ | 1867613518173306880 |
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| access_status_str | Open Access |
| author2 | Hammes, Pieter Snyman, 1941- |
| author_browse | Hammes, Pieter Snyman, 1941- |
| author_facet | Hammes, Pieter Snyman, 1941- |
| collection | Thesis |
| dc_rights_str_mv | © 1999, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (PhD)--University of Pretoria, 2003. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/28559 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:37:25.198Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/28559 Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature Hammes, Pieter Snyman, 1941- lewis.metho@dae.kzntl.gov.za Metho, Lewis Amollo Grain protein content Bread-making quality Yield components Wheat yield Photoperiod Soil fertility UCTD Dissertation (PhD)--University of Pretoria, 2003. The effects of soil nutrient status on the performance of four South African wheat genotypes were investigated in a long-term fertilization experiment. The objective was to quantify the effects of soil fertility on yield, yield components, grain nitrogen content, grain protein yield, grain protein content, flour yield and bread-making quality. The relative contribution of main stems and tillers, as well as the contribution of first, second and third kernels in the spikelets to grain yield and grain protein content were determined. The interactive effects between photoperiod, temperature and vernalization on grain yield, yield components and grain protein content were also quantified. Increasing soil fertility increased grain yield and most components of yield, grain nitrogen content, grain protein yield, aboveground biomass and harvest index, but depressed mean kernel mass. Significant interactions between cultivar and soil fertility were observed for grain yield, grain number, kernel mass, protein yield, biomass and harvest index, indicating differences in cultivar ability to produce yield and quality. Within a cultivar, the main stem, first tiller and second tiller did not differ in mean grain protein content, indicating that late-maturing tillers do not affect the grain protein content of wheat. Grain protein content, flour yield, loaf volume, water absorption and mixograph peak mixing time varied with soil fertility. The interaction between cultivar and soil fertility was significant for the above mentioned parameters with the exception of mixograph peak mixing time, indicating wheat genotypes differences in bread-making quality potential. The potential ability of wheat cultivar Kariega to produce higher grain yield, protein yield and loaf volume in the K and P limiting soil fertility situations deserve further investigation. In a growth chamber study, the low temperature regimes and long photoperiod conditions resulted in the highest grain yield, number of grains, largest mean kernel size and highest grain protein content. Plant Production and Soil Science unrestricted 2013-09-07T13:43:20Z 2002-11-01 2013-09-07T13:43:20Z 1999-07-30 2003-11-01 2002-10-09 Dissertation Metho, L 1999, Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature, PhD dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28559 > http://hdl.handle.net/2263/28559 http://upetd.up.ac.za/thesis/available/etd-10092002-124728/ © 1999, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Grain protein content Bread-making quality Yield components Wheat yield Photoperiod Soil fertility UCTD Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature |
| title | Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature |
| title_full | Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature |
| title_fullStr | Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature |
| title_full_unstemmed | Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature |
| title_short | Yield and quality response of four wheat cultivars to soil fertility, photoperiod and temperature |
| title_sort | yield and quality response of four wheat cultivars to soil fertility photoperiod and temperature |
| topic | Grain protein content Bread-making quality Yield components Wheat yield Photoperiod Soil fertility UCTD |
| url | http://hdl.handle.net/2263/28559 http://upetd.up.ac.za/thesis/available/etd-10092002-124728/ |