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The genotypic variation in the positive response of sorghum to higher sowing density is linked to an increase in water use efficiency

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Relation http://oar.icrisat.org/12852/
https://www.sciencedirect.com/science/article/pii/S116103012400128X
https://doi.org/10.1016/j.eja.2024.127207
 
Title The genotypic variation in the positive response of sorghum to higher sowing density is linked to an increase in water use efficiency
 
Creator Raphaël, P
Kakkera, A
Kholova, J
François, T
 
Subject Semi-Arid Tropics
Sorghum
 
Description In semi-arid tropical areas, sorghum is sown at very low planting densities. Hence, increasing plant density represents an opportunity to improve productivity. However, assessing the expected increase in water needs is critical prior to testing higher densities under rainfed conditions. This was tested with a panel of elite cultivars in field and lysimiter experiments, and testing the effects of two density treatment, high (HD, 22 plants.m-²) and low (LD, 11 plants.m-²), on grain and biomass yield and on water use and water use efficiency (WUE). Doubling the conventional sowing density significantly increased biomass and grain yield, with a genotypic variability in the biomass response. No link was found between the response to density and the maintenance of the tillering capacity, whereas the response to density was somewhat explained by a differential increase in the leaf area index under high density (r=0.43 P
 
Publisher ELSEVIER
 
Date 2024-05-13
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_attribution
 
Identifier http://oar.icrisat.org/12852/1/European%20Journal%20of%20Agronomy_158_1-8_2024.pdf
Raphaël, P and Kakkera, A and Kholova, J and François, T (2024) The genotypic variation in the positive response of sorghum to higher sowing density is linked to an increase in water use efficiency. European Journal of Agronomy (TSI), 158. pp. 1-8. ISSN 1161-0301