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Type of publication: conference paper
Type of publication (PDB): Straipsnis nerecenzuojamoje Lietuvos konferencijos medžiagoje / Article in non-peer-reviewed Lithuanian conference proceedings (P2c)
Field of Science: Agronomija / Agronomy (A001)
Author(s): Sinkevičiūtė, Vilija
Contributor(s): Marcinkevičienė, Aušra
Title: Pasėlio tankumo įtaka vasarinių rapsų piktžolėtumui ir dirvožemio fermentų aktyvumui
Other Title: The influence of crop density on spring oilseed rape weediness and soil enzymes activity
Is part of: Jaunasis mokslininkas 2013: studentų mokslinės konferencijos pranešimų rinkinys / Aleksandro Stulginskio universitetas. Agronomijos fakultetas. Akademija,, 2013
Extent: p. 109-111
Date: 2013
Abstract: Field experiment was conducted in 2012 at the Experimental Station of Aleksandras Stulginskis University. Soil – Calc(ar)i-Endohypogleyic Luvisol. The objective of these investigations was to determine the influence of crop density on spring oilseed rape (Brassica napus L. ssp. oleifera annua Metzg.) cultivar ‘Fenja’ weediness and soil enzymes ure-ase and saccharase activity. Treatments of the experiment: 1) 2 kg ha-1 (50–100 plants m-2), 2) 4 kg ha-1 (100–150 plants m-2), 3) 6 kg ha-1 (150–200 plants m-2), 4) 8 kg ha-1 (200–250 plants m-2), 5) 10 kg ha-1 (250–300 plants m-2), 6) 12 kg ha-1 (300–350 plants m-2), 7) 14 kg ha-1 (350–400 plants m-2), 8) 16 kg ha-1 (400–450 plants m-2). The highest number of weeds was found at a crop density of 150,1–200 plants m-2. With the increasing spring rape crop density from 200.1 to 450 plants m-2 the number of weeds significantly decreased (by 23.0 to 37.0 %), compared with the crop density of 150.1–200 plants m-2. With the increasing number of plants to 350 per m-2, the dry matter mass of weeds decreased but not significant differences were established. At a rape crop density of 350.1–450 plants m-2, in comparison with the thinnest crop, a significant decrease of dry matter mass of weeds (from 54.7 to 58.2 %) was observed. Negative and statistically significant relationship was established between spring rape crop density and dry matter mass of weeds (r = - 0.85, P < 0.01). With increasing spring rape crop density, compared with the thinnest crop, a trend of increased activity of urease was obtained. Significanty higher (23.5 %) activity of saccharase, in comparison with the thinnest crop, was found at a crop density of 150.1–250 plants m-2
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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