Effect of irrigation on total [water] content in apple-tree leaves
Miletic, R. | Mitic, N. | Nikolic, R.(Institut za istrazivanja u poljoprivredi Srbija, Zajecar (Serbia and Montenegro). Centar za poljoprivredna i tehnoloska istrazivanja)
The study shows the results of dynamics of daily change of total water content in leaves of the apple-trees in dependance of irrigation norms. The irrigation norms for the three variants were: 1) 55 mm, 2) 80 mm, 3) 100 mm, while the fourth variant was a control one without irrigation. The study shows average results for all cultivars per irrigation variants and time of sampling. Irrigation reflected directly on the status of total water content in the leaves of apple-trees. The content of total amount of water was equalized with the state from beginning at 7a.m., depending on the norm on the tenth, eleventh and twelfth day after irrigation. During the trial performance, on the control variant, the total water content was constantly decreasing. The line trend of total water content in all variants and sampling terms showed negative tendency, except at 7a.m. in the third variant (b=0.04). Among the air temperatures and total water content, all values of the irrigated variants were negative at 7 a.m., while on the control one the correlation was positive. Positive correlations were found between total water content and relative air humidity at 7 a.m. in all variants except in the control, while they were negative at 2 p.m. amd 9 p.m.
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