Dynamics of potato yield formation and tuber quality as affected by pre-irrigation moisture. [M.Sc. thesis] | Dinamika formiranja prinosa i kvalitet krtola krompira u zavisnosti od predzalivne vlaznosti. Magistarski rad
2008
Milic, S.
A two-year experiment on calcareous chernozem was carried out to determine the how irrigation and different pre-irrigation soil moisture affect yield formation dynamics, yield components, and tuber quality in potato. The trial had four replicates and was set up acCording to a block design adapted for sprinker irrigation conditions. It included treatments with pre-irrigation moisture levels of 60%, 70% and 80% of field water capacity (FC) and a nonirrigated control treatment. Irrigation significantly increased the yield of potato, which rose from 37.27 to 75.86%. Under irrigation, the percentage contribution of the small fractions decreased in favor of the 55 mm one, or fractions above the 45-55 mm range. On average, irrigation brings about highly significant increases (12,5-78.90%) in biological potato yield relative to natural moisture conditions. In the present study, a significant correlation was observed between biological yield and market yield in both study years. On average, irrigated treatments produced significantly more tubers than the conditions of natural water supply. Depending on pre-irrigation moisture, the weight of potato vine increased with increasing number of days since planting, peaked between the 105th abd 110th day, and the began to decrease. Irrigation increased total tuber weight during the growing season compared with nonirrigated conditions. The increases ranged between 26 and 51% depending on pre-irrigation moisture and the part of the growing season. The irrigation treatments and different pre-irrigation soil moisture levels had no effect on the pH value and ash content of the potato tubers. The user of irrigation in combination with increasing pre-irrigation soil moisture reduced the starch content of the tubers.
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