Resposta fotossintética do feijoeiro em função da intensidade de radiação e do teor de água no solo
Carregando...
Data
2015
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
It was aimed to determined the net photosynthesis rate of bean plants as function of
radiation intensity, soil water content in different soil type. The plants where grown in pots in a
greenhouse. Photosynthetic response curves were made as a function of radiation intensity (0 to
-2
1500 μmol m ). Net photosynthesis measurements were started at the R1 stage (flowering), when
irrigation treatments were initiated (irrigated and non-irrigated). A completely randomized design was
used, in a factorial scheme 11x2x2 (times; irrigation and non-irrigated; clay and sandy soil texture),
-1 -1
with 3 replicates. The highest net photosynthesis (≈16 μmolCO 2 mol s ) was reached for a
-2
radiation intensity between 900-1000 μmol m , in a water content at field capacity, independent of
the soil type. Photosynthesis rate was observed to decrease with decreasing water content. It was
concluded that can determine an assimilation/transpiration critical point of soil water content from net
photosynthesis measurements.
Descrição
Palavras-chave
Déficit hídrico, Phaseolus vulgaris L., Resposta fisiológica, Teor de água no solo, Demanda atmosférica, Water deficit, Physiological response, Phaseolus vulgaris L., Atmospheric demand, Soil water content
Citação
CASAROLI, Derblai; VAN LIER, Quirijn de Jong. Resposta fotossintética do feijoeiro em função da intensidade de radiação e do teor de água no solo. Revista de Ciências Agro-Ambientais, Alta Floresta, v. 13, n. 1, p. 69-75, 2015.