Assessment of the effect of peat-humus substances and inorganic fertilizers on potato fields productivity
2008
Malyuga, A.A. | Enina, N.N., Siberia Research and Development Inst. of Farming and Chemization of Agriculture, Novosibirsk (Russian Federation) | Burmistrova, T.I., Siberia Research and Development Inst. of Agriculture and Peat, Tomsk (Russian Federation)
The studies were done in 2004-2005 in the Novosobirsk Region on plots sized 11.2 square meters. The distribution on planting material and the initial population number in soil of the Rhizoctonia blight causing agent was extremely high and anounted to 37% and 24.4-25.7 propagules/100 g soil. Sodium humate was applied to treat tubers in the concentration of 0.75%, to treat plants – 0.01%, oxyhumate with microelements (boron, molibden, copper, manganese) – in the concentrations of 0.05 and 0.005%, respectively, oxydate and oxyhumate – in the same concentrations for the two treatments (0.0075 and 0.005%, respectively). Preplanting treatment reduced the numbers of releases of Rhizoctonia blight 1.3-1.9 times compared to the control; at the background of fertilizer – 2.2-2.5 times. An increase in vegetative mass of plants by humates was 1.2-1.5 times; by mineral fertilizer – 1.4 times. The maximum yield was reached by treating tubers and plants during applying mineral fertilizers. This parameter exceeded the control one 2.3-3.3 times. In biological efficiency huminic agents did not greatly differ, and in view of economic efficiency the best ones were exydate and oxyhymate
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