108(1) str 4
ISSN 1392-3196 / e-ISSN 2335-8947
Zemdirbyste-Agriculture, vol. 108, No. 1 (2021), p. 27–34
The effect of liming and organic fertilisation on the incidence of weeds in the crops of the rotation
Regina SKUODIENĖ, Regina REPŠIENĖ, Danutė KARČAUSKIENĖ, Vilija MATYŽIŪTĖ
To maintain the potential productivity of Retisol and produce stable yields of agricultural crops, one has to regularly lime and replenish soil reserves with organic matter. If the necessary amount of manure cannot be accumulated on farms, it is relevant to use other organic fertilisers. The current paper presents the results of long-term manuring experiment that was carried out at the Vėžaičiai Branch of Lithuanian Research Centre for Agriculture and Forestry under humid littoral climatic conditions during the 2015–2019 period. The objective of this study was to determine the influence of liming and organic fertilisation on the changes in weed incidence in the crops of the sustainable crop rotation. The experiment was carried out in the soils differing in acidity: unlimed soil with pH 4.13 and limed soil with pH 5.87. The organic fertilisation treatments were: 1) without organic fertilisers (control); 2) green manure; 3) farmyard manure 40 t ha-1; 4) green manure, on the background of 40 t ha-1 farmyard manure; 5) farmyard manure 60 t ha-1; 6) green manure, on the background of 60 t ha-1 farmyard manure.
The study found that at the beginning of crop growing season, i.e. during weed germination, soil acidity had significant influence on the total number of weeds, number of weed species as well as percentage of the annual dicotyledonous weeds and acidophilic weeds. The significant impact of interaction of soil acidity and organic fertilisation on weed incidence indices showed up at the maturity stage of crops of the rotation.
Key words: acidophilic weeds, annual weeds, soil pH, weed community dynamics, weed number and dry biomass.
Full text: 108_1_str4.pdf