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One of the elements of modern plant fertilization systems is soil biostimulants. Like fertilizers, they provide plants with nutrients, and thanks to the content of additional substances (e.g. seaweed extracts, amino acids), plant development is affected. The aim of this study is to compare the effect of selected soil biostimulants and traditional P+K+Ca fertilization on changes in the content of crude...
The content of structural carbohydrates and lignin are important assessment criteria of the feed value of meadow plants. It is affected by many independent factors, including among others its development stage during the harvest as well as climatic conditions, especially the amount of rainfall. During the years 2014-2016, plant samples were harvested at weekly intervals, respectively five times from...
The artide presents the results of a 2-year field study aimed at assessing the chemical composition of maize plants depending on the depth of two-component (Nl') mineral fertilizer placement in the soil profile, the type of nilrogen ferlilizer and the date of its application. Weather conditions, mainly thermal, in the early maize growing season, had no signitcant etfect on the chemical composition...
The timing of harvesting the first regrowth affects the quantity and quality of the harvested forage, induding fibre content Plant fibre is the building block of cell walls, ils components are cellulose, hemicellulose, lignin, undecomposed protein, pectin, water and ash. Its properties are intluenced by factors such as meteorological condilions in a given season, soil conditions and ferlilizalion,...
In the presented study, Deschampsia caespitosa was shown to have allelopathic properties, which can affect the species that co-create of the phytocenosis. In the course of experiments the occurrence of allelopathic compounds was determined in soil samples from phytocenoses differing with respect to proportions of Deschampsia caespitosa as well as utilisation intensity. They were tested against a standard...
The study presents the results of a 4-year field study aimed at assessing nutrient content of two maize juvenile stages (BBCH 17/18 and BBCH 18/19) in relation to the depth of two-component (NP) mineral fertilizer placement in the soil layer (0, 5, 10, 15 cm), type of nitrogen fertilizer (ammonium nitrate, urea) and date of its application (before sowing, in the BBCH 15/16 stage). Maize showed a high...
The aim of the study was to determine the effect of sowing density on grain yield of two types of maize cultivars. The field experiment was carried out in 2012-2014 at the Department of Agronomy at the Poznań University of Life Sciences. The first order factor was: the cultivars SY Cooky and Drim “stay-green”, while the second order factor was: sowing density of 6, 7, 8, 9 and 10 plants per 1 m-2...
During the years 2014-2015, herbage samples of red clover (Trifolium pratense L.) variety Chlumecky and birdsfoot trefoil (Lotus corniculatus L.) variety Leo were harvested at weekly intervals on 9 occasions from late April to late June. Effects of legume plant species and date of harvest on crude protein (CP), water soluble carbohydrates (WSC), neutral detergent fiber (NDF), acid detergent fiber...
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