Gas exchanges and photochemical efficiency of West Indian cherry cultivated with saline water and potassium fertilization

Revista Brasileira de Engenharia Agricola e Ambiental

Sá, Francisco V. da S.¹  Dias, Adaan S.²  Lima, Geovani S. de³  Gheyi, Hans R.⁴ 

[1] Universidade Federal Rural do Semi-Árido, Mossoró, Brazil;Universidade Federal de Campina Grande, Campina Grande, Brazil;Universidade Federal de Campina Grande, Pombal, Brazil;Universidade Federal do Recôncavo da Bahia, Cruz das Almas, Brazil

关键词: Malpighia emarginata;    saline stress;    physiology;    fruit crops.;   

DOI  :  10.1590/1807-1929/agriambi.v22n9p628-633

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The problem of the lack of adequate water resources for agriculture has intensified in recent years, making it necessary to use waters with relatively high concentration of salts for the irrigation of crops all over the world. The objective of this study was to evaluate the influence of potassium (K) fertilization as a salt stress attenuator on gas exchanges and photochemical efficiency of West Indian cherry. The crop was cultivated under greenhouse conditions in the municipality of Campina Grande, PB, in lysimeters filled with 250 kg of sandy loam soil. Treatments were distributed in randomized blocks, in a 2 x 4 factorial scheme, with two levels of electrical conductivity of irrigation water - ECw (0.8 and 3.8 dS m-1) and four K doses (50, 75, 100 and 125% of recommendation), in which the dose corresponding to 100% was equal to 19.8 g of K2O, with three replicates and one plant per repetition. Seedlings of the West Indian cherry cultivar BRS 366-Jaburu, grafted onto a locally developed rootstock from the clonal garden of the EMBRAPA Tropical Agroindustry, Pacajus, CE, were used. Irrigation with salinized water (electrical conductivity of 3.8 dS m-1) compromised the gas exchange and the photochemical efficiency of West Indian cherry plants. Potassium fertilization was not efficient at reducing the stress caused by water salinity on West Indian cherry plants.

【 授权许可】

CC BY