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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidade Federal de Goiás
2020
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| Online Access: | https://www.redalyc.org/articulo.oa?id=253068033017 https://www.redalyc.org/journal/2530/253068033017/ https://www.redalyc.org/journal/2530/253068033017/html/ https://www.redalyc.org/journal/2530/253068033017/253068033017.epub https://www.redalyc.org/journal/2530/253068033017/movil https://doi.org/10.1590/1983-40632020v5058854 |
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Table of Contents:
- Gas exchanges and growth of soybean cultivars submitted to water deficiency Jodean Alves da Silva Pietros André Balbino dos Santos Luiz Gonsaga de Carvalho Ernandes Guedes Moura Fabrício Ribeiro Andrade Agrociencias Glycine max water tension in the soil instantaneous carboxylation efficiency A low availability of water in the soil may alter morphological traits and physiological processes in soybean, limiting its development, mainly at late sowings. This study aimed to evaluate the leaf gas exchanges and dry matter accumulation in soybean cultivars under low water availability at late sowing. An Oxisol with a very clayey texture was employed. A completely randomized design, in a 5 × 3 factorial scheme, with four replications, was used. The treatments were five water tensions (10 kPa, 15 kPa, 25 kPa, 40 kPa and 60 kPa) combined with three soybean cultivars (BRS Favorita, BRSMG 820 and BRSMG 850). The response variables were measured at 55 days after the emergence. The values for stomatal conductance, transpiration, photosynthesis rate, intercellular CO. concentration and instantaneous carboxylation efficiency were significantly reduced (p < 0.05) with the increase of the water tension in the soil. The gas exchanges in the soybean plants were also reduced with the increase of the water tension in the soil, being the most critical ones observed from 25 kPa. BRSMG 850 showed the best performance for production of root dry matter in this water tension in the soil. 2020 artículo científico 1517-6398 https://www.redalyc.org/articulo.oa?id=253068033017 https://www.redalyc.org/journal/2530/253068033017/ https://www.redalyc.org/journal/2530/253068033017/html/ https://www.redalyc.org/journal/2530/253068033017/253068033017.epub https://www.redalyc.org/journal/2530/253068033017/movil https://doi.org/10.1590/1983-40632020v5058854 en http://www.redalyc.org/revista.oa?id=2530 Pesquisa Agropecuária Tropical application/pdf Universidade Federal de Goiás Pesquisa Agropecuária Tropical (Brasil) Vol.50