Morphological and physiological responses of acai seedlings subjected to different watering regimes

作者：Silvestre Walter V D^*; Pinheiro Hugo A; Souza Rodrigo O R de M; Palheta Lenilson F

来源：Revista Brasileira de Engenharia Agricola e Ambiental, 2016, 20(4): 364-371.

DOI：10.1590/1807-1929/agriambi.v20n4p364-371

• waterlogging
• growth
• water deficit
• Euterpe oleracea

Seedlings of acai obtained from plant material native to floodplains (from Laranjeira and Muana) and adapted to upland areas (cv. BRS-Para and ecotype Hideo) were cultivated between March and October 2013 in a greenhouse, to test the hypothesis that water requirement for seedling production varies according to the origin of plant material. The seedlings were subjected to watering regimes corresponding to 40, 70, 100 and 130% of field capacity. Regardless of plant material, the production of vigorous seedlings was feasible only under irrigation of 100 and 130% of field capacity. The seedlings produced under 130% of field capacity showed higher plant height, stem diameter, number of leaves, total leaf area, leaf and root biomass, total plant biomass and root/shoot ratio than those produced under 100% of field capacity. The former also showed higher net CO2 assimilation rate, lower stomatal conductance and transpiration and higher instantaneous water use efficiency. In conclusion, the water requirement to produce vigorous seedlings of acai does not vary within plant material and more vigorous seedlings are produced under irrigation of 130% of field capacity.

• 出版日期2016-4