Apple Tree Responses to Irrigation under the Grower Condition in the Climate of Düzce Area

Authors : Selçuk ÖZMEN

Pages : 0-0

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Publication Date : 2016-09-19

Article Type : Research Paper

Abstract :This study aimed to investigate response of “Granny Smith” apple insert ignore into journalissuearticles values( Malus domestica Borkh. ); tree to irrigation under grower condition in the climate of Düzce area. In this study, some physiological observations, such as leaf water potential insert ignore into journalissuearticles values(LWP);, stomatal conductance insert ignore into journalissuearticles values(g s ); and photosynthetic active radiation insert ignore into journalissuearticles values(PAR); on the apple trees, were performed weekly before irrigation in the selected episode during the irrigation season. Concurrently, in all irrigation season, soil water content insert ignore into journalissuearticles values(SWC); in the different soil layers insert ignore into journalissuearticles values(0-30 cm, 30-60 cm, 60-90 cm, 90-120 cm); was also monitored at the apple orchard. All observations were evaluated between each other after harvest of apple trees. Study results showed that SWC was fluctuated between field capacity insert ignore into journalissuearticles values(FC); and permeant wilting point insert ignore into journalissuearticles values(PWP); during irrigation season. SWC did not fulfill until 50% of amount of allowable depletion in the apple orchard’s soil profile except some high rainy days. LWP, g s and PAR were increased by increasing of SWC in all soil layers. The strongest relationship for all correlations in all soil layers was obtained in 30-60 cm soil layers at the apple orchard. It was found that LWP had strong relationships with PAR insert ignore into journalissuearticles values(R 2 =0.84); while LWP~g s relationships were weak insert ignore into journalissuearticles values(R 2 =0.53);. In this study, according to observations, it could be stated that apple trees to irrigation water under grower condition was not satisfied. Finally, a proper irrigation scheduling was needed for such as apple orchards even though precipitation was frequently happened in the summer.
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