20.500.12556/RUL-169505 Vpliv biostimulanta na količino in kakovost pridelka vrtne solate (Lactuca sativa) ob zmanjšani oskrbi z vodo The effect of a biostimulant on the quantity and quality of lettuce(Lactuca sativa) yield under deficit water supply V poskusu, ki je potekal od aprila do maja 2022, smo proučevali vpliv foliarnega dodajanja biostimulanta rastlinam solate, ki so bile zadostno in nezadostno oskrbovane z vodo, na količino in kakovost pridelka. V rastlinjaku na Laboratorijskem polju Biotehniške fakultete UL smo zasnovali lončni poskus s štirimi obravnavanji v šestih ponovitvah. Prvi proučevani dejavnik je bilo namakanje rastlin, in sicer polno do 100 % poljske kapacitete tal (100 % PK) in deficitno (50 % PK). Drugi dejavnik pa je bilo tretiranje z biostimulantom (tretirano +B, netretirano +0). Biostimulant Delfan Plus smo v 0,1-% koncentraciji nanesli na rastline štirikrat med rastno. Rastline smo porezali v tehnološki zrelosti in opravili meritve mase nadzemnega dela, mase tržnega dela, dolžine stebla, mase korenin, SPAD meritve, vsebnosti nitrata. Na maso nadzemnega dela rastlin tretiranje z biostimulantom ni imelo vpliva. Povprečna masa nadzemnega dela rastlin je bila 403 ± 16 g pri 100 % PK+B in 404 ± 25 g pri % PK+0. Pri deficitnem namakanju je bila povprečna masa nadzemnega dela rastlin 207 ± 12 g pri 50 % PK+B in 194 ± 9 g pri 50 % PK+0. Tretiranje z biostimulantom je zmanjšalo tržno maso solate pri zadostnem namakanju rastlin, ki je bila 260 ± 11 g pri 100 % PK+0 in 228 ± 16 g pri 100 % PK+B. Pri deficitnem namakanju je tretiranje z biostimulantom povečalo tržno maso rastlin, ki je bila 132 ± 8 g pri 50 % PK+0 in 151 ± 14 g pri 50 % PK+B. Tretiranje z biostimulantom ni imelo vpliva na premer solatne rozete, na dolžino stebla in na vsebnost nitrata ne glede na režim namakanja. Bistimulant je imel vpliv na zmanjšanje koreninske mase in na povečanje relativne vsebnosti klorofila vendar samo pri rastlinah z deficitnim namakanjem. In the trial conducted from April to May 2022, the effect of adding a biostimulant to the leaves of lettuce plants with full and deficit irrigation on the quantity and quality of the yield was investigated. In the laboratory field of the Biotechnical Faculty of the University of Ljubljana, the pot experiment was set up in four treatments with six replicates each. The first factor investigated was irrigation to 100 % of the soil field capacity (100 % PK) and deficit irrigation (50 % PK). The second factor was treatment with a biostimulant (treated +B, untreated +0). The biostimulant Delfan Plus was applied to the plants four times at a concentration of 0.1 % during the growth period. The plants were harvested at the time of technological maturity and measurements were taken of above-ground plant mass, marketable plant mass, stem length, root weight, SPAD measurements and nitrate content. The mass of the above-ground part of the plant was not affected by the biostimulant treatment. The average aboveground mass of the plants was 403 ± 16 g at 100 % PK+B and 404 ± 25 g at % PK+0. With deficit irrigation, the average aboveground mass of the plants was 207 ± 12 g at 50 % PK+B and 194 ± 9 g at 50 % PK+0. The biostimulant application decreased the marketable mass of the lettuce plants in treatment with 100 % irrigation, which was 260 ± 11 g at 100 % PK+0 and 228 ± 16 g at 100 % PK+B. At plants with deficit irrigation, the biostimulant treatment increased the marketable mass of the plants, which was 132 ± 8 g at 50 % PK+0 and 151 ± 14 g at 50 % PK+B. Treatment with the biostimulant had no effect on lettuce rosette diameter, stem length and nitrate content, regardless of irrigation regime. The biostimulant had an effect on reducing root mass and increasing relative chlorophyll content, but only in plants with deficit irrigation. Lactuca sativa biostimulant foliarno gnojenje kakovost pridelka nitrat Lactuca sativa foliar fertilization biostimulant yield quality nitrate true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-05-30 12:52:55 2025-05-30 12:53:00 2025-06-03 09:21:34 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 257405 238035203 47925.pdf 47925.pdf 1 A1CFDA3B64321D996A16820FA53A00DA 94ccf5fc3046dbeea2b3e6b068290207105870090d6cc5d0bbee1b5cf1bd5e3c f1c25bbc-3d42-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210928 Biotehniška fakulteta 0 0 0