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Summary
Productivity and quality of a lawn grass stand are largely due to plant density,
which is associated with the rate and timing of mineral the
early summer period of 2012 in the conditions of Nikolsk, the Vologda Region the
experiment on studying biological and economic characteristics of lawn grasses and
the dynamics of lawn grass stands formation was laid. The soil of the research plot
is medium sod podzolic, cultivated with the average organic matter content of 3.52
% with slightly acidic reaction (pH Salt - 5.3). The content of mobile phosphorus and
exchange potassium is high (Р2О5 - 178 mg / kg, К2О - 186 mg / kg of soil). The
experiment includes 5 options laid down in 4-fold repetition. Experimental options are
presented by the following types of meadow plants: Kentucky bluegrass (Poa pratensis),
red fescue (Festuca rubra), common bentgrass (Agrostis vulgaris), common bluegrass
(Poa trivialis); meadow fescue (Festuca pratensis). One of the objectives of the study
was to develop thefertilizer application system for lawn herbages depending on their
species composition. To make recommendations on the doses of fertilizer application
while sowing lawn grass the method of elemental balance was used.During the tests the
nutrient removal by surface and underground organs of lawn plants in the whole during
the growing season, and separately for each period of mowinghas been determined. As
a result of the researchit has been stated thatfor the formation and sustainability of high
quality grass stand during the growing season it is necessary to apply fertilizer in the
following doses: nitrogen - 25-35 g/m2, phosphorus - 8-15 g/m2, potassium - 22-35 g/
m2, ornitrogen - 2.5-3.5 kg/100 m2, phosphorus - 0.8-1.5 kg/100 m2, and potassium-
2.5-3.5 k /100 m2. The doses of fertilizers are distributed fairly evenly according to the
mowing periods: on average 35, 33 and 32 %, respectively.
Молочнохозяйственный вестник, №1 (21), I кв. 2016 136
РЕФЕРАТЫ
Электронная Научная СельскоХозяйственная Библиотека