THE NATURE OF WEED INFESTATION IN THE AGROCENOSIS AND QUANTITATIVE AND QUALITATIVE INDICATORS OF PRODUCTIVITY OF MID-SEASON CORN HYBRIDS DEPENDING ON FOLIAR FEEDING WITH MICROFERTILIZERS.
Abstract
The article presents the results of two-year studies of the main trends in the formation of the type and level of weed infestation of agrocenoses of mid-season corn hybrids of the agroecological group (FAO 300-310) bred by Syngenta: SI Granarys, SI Ozon and SI Torino, depending on the foliar vegetative feeding of crop plants with liquid complex microfertilizers. A thorough analysis of the spectrum of harmful botanical species in the crop, their quantitative composition and total biomass per unit of sown area was carried out, with the identification of the most harmful weeds that require special approaches to the implementation of an integrated weed control system as a component of modern technology for growing corn for grain. The most fundamental elements that form the indicators of the corn yield structure, depending on the hybrid composition and the algorithm of foliar feeding with microfertilizers, were analyzed, namely: plant height, number of leaves on the plant, number of ears on the plant, height of attachment of the lower ear, total biomass yield, weight of grain from one plant and from one ear, length and diameter of the ear, productivity of one ear and the yield of conditioned seeds from it. The main trends and dependencies of the accumulation of total nitrogen in the plant biomass of modern mid-season corn hybrids under the influence of the factor of foliar feeding of crop plants with liquid complex microfertilizers are outlined. Laboratory studies were also conducted on the quality indicators of corn grain: the content of dry matter and total nitrogen in conditioned grain was determined, as well as the content of protein in it as the main indicator, which determines both the food and feed qualities of corn raw materials. The article presents the results of an experimental study of the influence of the studied factors on the formation of the credit indicators of the generative part: natural grain mass, M1000 indicator, actual grain moisture at the time of harvesting and its yield in the accounting state
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