Agrophytocenoses based on promising varieties of meadow clover on drained lands of the Non-Chernozem zone

• Main Authors: E. N. Pavlyuchik, A. D. Kapsamun, N. N. Ivanova, T. N. Panteleeva, N. A. Epifanova
• Format: Article
• Language: Russian
• Published: Federal Agricultural Research Center of the North-East named N.V. Rudnitsky 2020-04-01
• Series: Аграрная наука Евро-Северо-Востока
• Subjects: trifolium pratense l.; medicagoxvaria t.; phleum pratence l. festuca pratensis huds.; cereal grasses; grass mixtures; periods of use; stem density; dry mass productivity
• Online Access: https://www.agronauka-sv.ru/jour/article/view/519
• ISSN: 2072-9081; 2500-1396

The article presents data of studies carried out in the northwestern part of the Non-Chernozem zone (Tver region) in 2019. Studied were fodder mixtures based on meadow clover Kretunovsky, Green, Chance, Falensky 86 varieties mixed with variegated alfalfa Vega 87 variety and cereal components − timothy grass VIK 9 and meadow fescue Sakharovskaya varieties. The yield of dry weight of legumes and cereal grass stands of the first year of use during primary mowing in ferti-lized varieties was 4.4-6.9 t/ha at the height of grass stand of 66-77 cm and stalk density of 318-507 pcs/m2. The indicators in variants without fertilizers were lower, the height of the grass stand was 63-69 cm, the density was 334-595 pcs/m2 and the yield of fodder mass was 3.8-4.6 t/ha. Unfavorable climatic conditions during the period between mowings had a suppressive effect on growth and development of herbs, therefore, during the secondary mowing the height parameters of agrophytocenoses decreased by 1.2-1.3 times and did not exceed 32-44 cm against unfertilized background, 43-53 cm against a fertilized one. A decrease in shoot formation ability of herbs during the second mowing was not observed, the density of agrophytocenoses was at the level of 300-500 pcs/m. The yield of dry mass of the second mowing compared to the first mowing decreased by 1.3-1.7 times and was 2.2-5.4 t/ha. In the botanical composition of grass mixtures during the first mowing, leg-ume components prevailed − 35-65 %, during the secondary mowing the percentage of legumes did not exceed 15-30 %. The use of three-component grass mixtures in agriculture will make it possible to get from 6.7 to 9.3 tons per hectare of dry weight of complete feed for cattle for two mowings. Adaptation and cultivation on sod-podzolic soils in the humid zone of the Non-chernozem region of grass mixtures consisting of new-generation forage grasses is one of the reserves for increasing produc-tivity of forage crops by more than 10 %.