Please use this identifier to cite or link to this item:
Title: Gas exchange and water stress index in soybean cultivated under water deficit and soil compaction
Keywords: Water stress
Soil water availability
Leaf gas exchange
Soybean - Growth
Bulk density
Deficit irrigation
Estresse hídrico
Disponibilidade de água no solo
Troca gasosa foliar
Soja - Crescimento
Densidade aparente
Deficiência de irrigação
Issue Date: Mar-2022
Publisher: Universidade Federal de Viçosa
Citation: SILVA, J. A. da; CARVALHO, L. G. da; ANDRADE, F. R. Gas exchange and water stress index in soybean cultivated under water deficit and soil compaction. Revista Ceres, Viçosa, MG, v. 69, n. 2, p. 218-226, Mar./Apr, 2022. DOI: 10.1590/0034-737X202269020013.
Abstract: Water stress is intrinsically related to soil water availability which is determinant in gas exchanges, as well as soil compaction in soybean growth and development. This study aimed to evaluate the leaf gas exchange, water stress index, and dry mass accumulation of soybean cultivated in different daily irrigation depths and bulk density. The treatments were distributed in pots subdivided in a 4×4 factorial scheme: four levels of bulk density of the soil (1.0, 1.15, 1.30 and 1.45 g cm-3) and four daily irrigation depths (4.0, 5.0, 6.0- and 7.0-mm day-1), with three replications. Physiological and morphological variables were analyzed. There were low transpiration rates due to water deficit in the 4 mm daily irrigation depth that resulted in stomatal closure and impaired the performance of the photosynthetic process in soybean. The increase in soil density provided gains in shoot and dry root mass in the layer above the compacted one. Low availability of water in the soil reduces the photosynthesis and growth of soybean plants. Increase in bulk density of the soil promotes greater root development, with the layer above the compacted being the one that concentrates most of the roots.
Appears in Collections:DEA - Artigos publicados em periódicos
DEG - Artigos publicados em periódicos

This item is licensed under a Creative Commons License Creative Commons