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2009, vol. 46, br. 1, str. 23-32
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Dinamika formiranja nadzemne mase krompira i biološki prinos u zavisnosti od predzalivne vlažnosti zemljišta
Dynamics of potato vine yield formation and biological yield as affected by pre-irrigation soil moisture
aNaučni institut za ratarstvo i povrtarstvo, Novi Sad
bUniverzitet u Novom Sadu, Poljoprivredni fakultet
Sažetak
U cilju određivanja uticaja navodnjavanja i različite predzalivne vlažnosti zemljišta na dinamiku formiranja prinosa nadzemne mase krompira i biološkog prinosa, izvedena su dvogodišnja eksperimentalna ispitivanja na zemljištu tipa černozem varijanta karbonatni. Ogled je postavljen u četiri ponavljanja, po metodi blok sistema, prilagođenoj uslovima navodnjavanja kišenjem. Ogled se sastojao od tretmana: predzalivna vlažnost zemljišta (60 % PVK, 70% PVK i 80% PVK) kao i kontrolna nenavodnjavana varijanta. Navodnjavanje, u proseku, visoko signifikantno povećava biološki prinos u odnosu na proizvodnju krompira u uslovima prirodne obezbeđenosti vodom i varira u razmaku od 12,5% do 78,9%. Ostvarena je i značajna zavisnost biološkog prinosa sa tržišnim prinosom u toku obe godine istraživanja. Sa povećanjem broja dana od sadnje krompir, u zavisnosti od predzalivne vlažnosti, povećava masu čime i dostiže maksimalne vrednosti u periodu od 105 do 110 dana, a zatim opada.
Abstract
A two-year experiment on calcareous chernozem was carried out to determine the how irrigation and different pre-irrigation soil moisture affect vine yield formation dynamics and biological yield components. The trial had four replicates and was set up according to a block design adapted for sprinkler 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. 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. Depending on pre-irrigation moisture, the weight of potato vine increased with increasing number of days since planting, on average, peaked between the 105th and 110th day, and then began to decrease.
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