Crop water relationships and thermal adaptation of kathika beans (Phaseolus vulgaris L.) and green grams (Vigna radiata L. Wilczek) with special reference to temporal patterns of potential growth in the drylands of SE Kenya

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dc.contributor.authorShisanya, C.A.
dc.contributor.authorHornetz, B.
dc.contributor.authorGitonga, Nkanata Mburugu
dc.date.accessioned2014-01-15T14:32:24Z
dc.date.available2014-01-15T14:32:24Z
dc.date.issued2001
dc.descriptionDOI: 10.1006/jare.2000.0774en_US
dc.description.abstractHigh soil temperatures influence seedling emergence as well as the performance of plant organs and yields. Temperatures of above 40°C were recorded in the topsoil of the Ferralsols of the semi-arid areas of SE Kenya during the rainy season. Experiments were conducted in the climatological laboratory of the University of Trier, Germany, on two legumes (green grams and common beans var. kathika), grown by smallholder farmers in the study area under varying soil temperature conditions. The main objective was to examine the effect of soil temperature on various parameters: seedling emergence, crop water requirements, leaf area index and phenology of the two legumes. The simulated climatological laboratory conditions were similar to those at Kiboko, SE Kenya. This study confirmed that under high soil temperature conditions, green grams are well adapted to semi-arid and hot tropical lowlands as well as lower midlands due to low water requirements, high seedling emergence rates and good yield performance. However, kathika beans were very susceptible to the simulated extreme climatic environment. By means of crop simulation modelling, a temporal differentiation for potential growth of green grams is presented for the long and short rains according to different rainfall conditions (ENSO, antiENSO, normal) over a period of 31 years.en_US
dc.identifier.citationJournal of Arid Environments Volume 48, Issue 4, 2001, Pages 591-601en_US
dc.identifier.issn01401963
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/8584
dc.language.isoenen_US
dc.publisherJournal of Arid Environmentsen_US
dc.subjectCrop simulation modelen_US
dc.subjectCrop water requirementsen_US
dc.subjectENSOen_US
dc.subjectLAIen_US
dc.subjectPhaseolus vulgarisen_US
dc.subjectSeedling emergenceen_US
dc.subjectSemi-arid areas of SE Kenyaen_US
dc.subjectSoil temperaturesen_US
dc.subjectVigna radiataen_US
dc.titleCrop water relationships and thermal adaptation of kathika beans (Phaseolus vulgaris L.) and green grams (Vigna radiata L. Wilczek) with special reference to temporal patterns of potential growth in the drylands of SE Kenyaen_US
dc.typeArticleen_US
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