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Titolo:
TRANSPIRATION EFFICIENCIES OF MAIZE AND BEANS IN SEMIARID KENYA
Autore:
PILBEAM CJ; SIMMONDS LP; KAVILU AW;
Indirizzi:
UNIV READING,DEPT SOIL SCI READING RG6 2DW BERKS ENGLAND KARI,NARC MUGUGA NAIROBI KENYA
Titolo Testata:
Field crops research
fascicolo: 3, volume: 41, anno: 1995,
pagine: 179 - 188
SICI:
0378-4290(1995)41:3<179:TEOMAB>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
WATER-USE EFFICIENCY; MEDITERRANEAN-TYPE ENVIRONMENT; SOIL-WATER; NORTHERN SYRIA; SHOOT GROWTH; RAINFED CONDITIONS; BARLEY PRODUCTION; PEARL-MILLET; STORED WATER; WHEAT CROPS;
Keywords:
BEAN; EVAPORATION; MAIZE; TRANSPIRATION; TRANSPIRATION EFFICIENCY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
49
Recensione:
Indirizzi per estratti:
Citazione:
C.J. Pilbeam et al., "TRANSPIRATION EFFICIENCIES OF MAIZE AND BEANS IN SEMIARID KENYA", Field crops research, 41(3), 1995, pp. 179-188

Abstract

Maize and bean were grown under varying levels of nitrogen fertilizer, plant population, and irrigation at Kiboko, Kenya in the short rains1990, 1991, 1992 and the long rains 1991. The production of dry matter was not affected significantly by any treatment, because treatments only had a small impact on the balance between evaporation and transpiration. In all seasons the greatest loss of water from the profile wasthrough direct evaporation from the soil surface. Transpiration was always less than 25% of rainfall. The ratio of transpiration (T) to evapotranspiration (E + T) was small (0.23),but increased from 0.15 to 0.40 as rainfall increased from 158 mm in the long rains 1991 to 470 mm in the short rains 1992. Treatments had little impact on the balance between transpiration and evaporation from the soil surface. The average transpiration efficiencies for maize and bean were 89 and 29 kg shoot dry matter ha(-1) mm(-1), respectively. For each crop there was a 60% change in transpiration efficiency between the shea and the long rain season which could be accounted for by differences in saturation vapour pressure deficit.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 07:34:15