Abstract
Ecophysiology of west indian cherry irrigated with saline water under phosphorus and nitrogen doses
Highlights
Water availability in semi-arid regions is limited, especially in periods of higher atmospheric demand that coincide with periods of low rainfall
This study aimed to evaluate the effect of water salinity and phosphorus/nitrogen combinations on the ecophysiology of grafted West Indian cherry in the first year of cultivation
The experiment was installed in randomized blocks, in a 5 x 4 factorial arrangement, corresponding to five levels of irrigation water electrical conductivity (0.6; 1.4; 2.2; 3.0 and 3.8 dS m-1) and four fertilization managements based on variations in the recommended proportions of phosphorus/nitrogen (P/N) (100:100; 140:100; 100:140 and 140:140% P/N), with three replicates and one plant per plot
Summary
Water availability in semi-arid regions is limited, especially in periods of higher atmospheric demand that coincide with periods of low rainfall. Groundwater is a promising alternative, but most of it has excess of salts dissolved (AYERS; WESTCOT, 1985; MEDEIROS, 1992). In this region, water salinity is a problem as worrisome as low rainfall, and it is necessary to understand its causes and develop technologies for crop management and/or recovery of halomorphic soils (MEDEIROS, 1992; SÁ et al, 2017). Saline waters used in irrigation may pose risk to agricultural production, causing alterations of either osmotic or ionic nature in the development of most crops (MUNNS; TESTER, 2008; HABIBI; AMIRI, 2013). Besides osmotic and ionic effects, nutritional imbalance is caused by the alterations in the processes of absorption, transport, assimilation and distribution of nutrients in the plant, e.g., the excess of Na+ and Cl- inhibits the absorption of ions such as K+, Ca2+, Mg2+, NO3- and H2PO4-, negatively influencing plant growth, physiology and production (SYVERTSEN; GARCIA-SANCHEZ, 2014; RIBEIRO et al, 2016; SÁ et al, 2017)
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