The influnce of non-chemical weed control on the productivity of spring oilseed rape

https://doi.org/10.7220/9786094674662; https://zua.vdu.lt/wp-content/uploads/2020/12/Agroeco_2020_Abstracts-Book.pdfThere is a considerable amount of investigations on oilseed rape cultivated in an organic production system, but there is a lack of investigations in Lithuanian climate conditions, particularly involving innovative weed control methods. Field experiment was carried at Experimental Station of Vytautas Magnus University Agriculture Academy in 2014–2016. The aim of the study was to determine the influence of non-chemical weed control methods and bio-preparations on spring oilseed rape (Brassica napus L. spp. oleifera annua Metzg.) productivity. Treatments of the experiment: Factor A: weed control methods: 1) thermal (weed control with water steam, inter-row spacing 48 cm), 2) mechanical (weed control with an inter-row cultivator, inter-row spacing 48 cm), 3) self regulation (natural crop-weed competition, inter-row spacing 12 cm); Factor B: bio-preparations application: 1) with bio-preparations, 2) without bio-preparations. In the plots of thermal and mechanical weed control an increase was established in plant above-ground mass (from 1.52 till 2.40 times), area (from 1.59 till 186 times), length (from 1.55 till 2.00 times) and mass (from 1.42 till 1.60 times) of spring oilseed rape root, compared with the self-regulation plots. Bio-preparations increased oilseed rape above-ground mass, area, length and mass of root in the plots of thermal weed control. In the treatments of thermal and mechanical weed control in combination with bio-preparations, compared with self-regulations treatments, there was recorded higher plant height, dry matter mass, number of branches, number of siliques and number of seeds per silique. In the crop without the use of bio-preparations, the efficacy of mechanical weed control for oilseed rape biometric and yield structural indicators was higher, compared with that of thermal weed control. The highest oilseed rape seed yield was formed in the thermal weed control treatment in [...]Agronomijos fakultetasVytauto Didžiojo universiteta