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Titolo:
WATER EFFICIENCY AND STRESS ON GRAIN-SORGHUM AT DIFFERENT REPRODUCTIVE STAGES
Autore:
MASTRORILLI M; KATERJI N; RANA G;
Indirizzi:
IST SPERIMENTALE AGRON,ULPIANI 5 I-70125 BARI ITALY INRA,UNITE BIOCLIMATOL F-78850 GRIGNON FRANCE
Titolo Testata:
Agricultural water management
fascicolo: 1, volume: 28, anno: 1995,
pagine: 23 - 34
SICI:
0378-3774(1995)28:1<23:WEASOG>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDITERRANEAN-TYPE ENVIRONMENT; HARVEST INDEX; WHEAT; YIELD; GROWTH; CLIMATE;
Keywords:
PLANT WATER STATUS; SUPPLEMENTAL IRRIGATION; WATER DEFICIT; GRAIN SORGHUM YIELD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
M. Mastrorilli et al., "WATER EFFICIENCY AND STRESS ON GRAIN-SORGHUM AT DIFFERENT REPRODUCTIVE STAGES", Agricultural water management, 28(1), 1995, pp. 23-34

Abstract

The effects of water stress occurring at various growth stages duringthe reproductive cycle of grain sorghum were evaluated in open field conditions under a Mediterranean climate. This research was carried out under the same conditions in two steps: (1) assessing the degree of water stress; (2) evaluating the water use efficiency (WUE) and the sensitivity of phenological stages submitted to identical water stress, The first step consists in field calibration of the water stress criterion, During three soil drying cycles it was observed that: (1) the highest stomatal conductance occurred in correspondence with leaf water potential (Psi) values higher than - 1.5 MPa; (2) stomata tended to close when Psi becomes lower than -1.8 MPa. These values were retained in the second step for monitoring plant water status in four different plots: one never stressed and three stressed at different phenologicalstages (early flowering, seed-setting and ripening). An evaluation ofthe sensitivity of phenological stages submitted to identical water stress was obtained by comparing four yield components (above ground biomass, grain yield, 1000 grain weight and seed number) and WUE to those of the well-irrigated crop, The sensitivity was greatest at the early flowering stage. For water saving purposes, these conclusions could be useful for scheduling grain sorghum irrigation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 21:47:05