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Type of publication: conference paper
Field of Science: Agronomija / Agronomy (A001)
Author(s): Mockevičienė, Rita;Velička, Rimantas;Marcinkevičienė, Aušra;Pupalienė, Rita;Kriaučiūnienė, Zita;Butkevičienė, Lina Marija;Kosteckas, Robertas;Čekanauskas, Sigitas
Title: The effect of non-chemical weed control on soil biological properties in the spring oilseed rape crop
Is part of: Long-term Agroecosystem Sustainability: Links between Carbon Sequestration in Soils, Food Security and Climate Change : International scientific conference : AgroEco2016 : Programme and abstracts. Akademija, 2016
Extent: p. 52-53
Date: 2016
Keywords: Spring oilseed rape;Weed control systems;Soil enzymes;Earthworms;Roots;Organic farming
ISBN: 978-609-449-104-7
Abstract: Soil enzymes activity and abundance of earthworms are the important indicators of soil quality in the organic farming system. The objective of these investigations was to establish the effect of non-chemical weed control on plant root development, soil enzymes activity and abundance of earthworms in the organically grown spring oilseed rape (Brassica napus L.) crop cultivated in a soil with a regular and thickened humus layers. The field experiments were conducted in 2013–2015 at the Experimental Station of Aleksandras Stulginskis University. Soil – Calc(ar)i-Endohypogleyic Luvisol. Treatments of the experiment: weed control systems: 1) thermal (water steam), 2) mechanical (inter-row loosening), 3) smothering (self-regulation). Thermal and mechanical weed control were applied in oilseed rape crop cultivated at a wide row spacing of 48 cm, smothering – at an inter-row spacing of 12 cm. Spring oilseed rape was cultivated in a soil with a regular (23–25 cm) and thickened (45–50 cm) humus layers. It was determined that the highest biomass of spring oilseed rape roots (on average 1.68 t ha-1) was formed in a soil with a regular humus layer where mechanical weed control was applied. The biomass of oilseed rape roots depended on the crop density (r = 0.82–0.96, P < 0.05). In a soil with a regular humus layer different non-chemical weed control systems had a low influence on soil enzymes activity. In a soil with a thickened humus layer the significantly strongest activity of soil enzymes saccharase and urease, to compare with other treatments used, in 2013 and 2014 was obtained in plots where thermal weed control was applied, and in dry 2015 year – where smothering was used. In a thickened humus layer, as compared to regular one, the activity of urease was significantly (1.5–1.6 times) higher in 2013
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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