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YIELD AND QUALITY OF WHITE CABBAGE WHEN USING HUMIC PREPARATIONS

Solovieva Margarita Vladimirovna, Candidate of Agricultural Sciences, Associate Professor Romanov Pavel Vladimirovich, 2nd year Master's student in the direction of 35.04.04 "

Agronomy" Velikiye Luki State Agricultural Academy, Velikiye Luki, Russia, 182112, Pskov region, Velikiye Luki, Lenin Ave., 2 E-mail: zem@vgsa.ru

Abstract: The article presents the results of studies on the effect of humic preparations hydrohumin, humimax, potassium humate and humate "Fertility" on the yield and quality of a hybrid of white cabbage Extra F1. When processing seeds and seedlings, the highest yield of cabbage on average for 2 years was obtained from the use of humic preparation humate "Fertility" - 45.7 t/ha, the increase in yield was 4.0 t/ha (+9.5%). The preparations hydrogumin, humimax, potassium humate increased the yield of white cabbage by only 1.5-1.9 t/ha. The maximum yield of standard products was formed by cabbage Extra F1 (95.0%) when treated with the preparation humate "Fertility". The quality of white cabbage production did not deteriorate with the use of humic preparations. In all variants of the experiment, the nitrate content in the products was below the maximum permissible concentration. The preparations potassium humate and Fertility humate contributed to an increase in the vitamin C content in the products of 33.6 mg/% (+ 5.3 mg/%) and -38.0 mg/% (+9.7 mg/%), respectively. The sugar content in white cabbage did not change when treated with humic preparations.

Keywords: white cabbage, humic preparations, yield, marketability, product quality.

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631.812:631.861

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LABORATORY INSTALLATION FOR DETERMINING THE COEFFICIENT OF INTERNAL FRICTION OF BULK COMPOST

Grigorieva Victoria Alexandrovna, teacher of SPO Federal State Budgetary Educational Institution of Higher Education "State Agricultural Academy of Velikie Luki"

Russia. 182112, Pskov region, Velikiye Luki Lenin Avenue, 2, e-mail: vikagrig99@mail.com

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Abstract: Today, enterprises, farms, scientific and production associations are engaged in composting issues in the world. Unfortunately, in our country, in many cases, the production and practical use of compost is carried out without sufficient scientific and technological support. For this reason, I have assembled a laboratory installation to determine the coefficient of internal friction of bulk compost.

Keywords: composting, centrifugal spreader, flowability, organic farming, fertilizers

631.81:631.582:445.2

INFLUENCE OF VARIOUS TYPES OF FERTILIZERS ON THE NITROGEN REGIME OF SOD-PODZOLIC SANDY LOAM SOIL IN THE CONDITIONS OF THE PSKOV REGION

Volodina tamara ibraevna doctor of agricultural sciences, professor Vinogradova Evgeniya Vasilyevna, Master's student Komlyakov Sergey Evgenievich, Master's student "velikiye luki state agricultural academy"

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Abstract: The presented research results in field experiments on sandy loam sod-podzolic soil showed that the nitrogen regime of sod-podzolic sandy loam soil depends both on the type, doses of fertilizers used and on the prevailing meteorological conditions.

When comparing the effectiveness of various organic fertilizer systems, the main criterion is the productivity of cultivated crops. The effect and aftereffect of manure and bird droppings had a positive effect on the nitrogen regime of sod-podzolic sandy loam soil. A close relationship has been established between the content of mineral and easily hydrolyzable nitrogen in the arable soil layer. Studies conducted on sandy loam soil have shown high efficiency of the organomineral and organic fertilizer system on sandy loam sod-podzolic soil. Comparison of manure and bird droppings was in favor of the latter in both doses of 20 and 40 t/ha, which confirms the higher content of n, p, k in it and their good availability to plants, both in action and in aftereffect. The largest increases were obtained in the variants with the organomineral system and in the variants with bird droppings and amounted to 69 and 82% in relation to the control. The aftereffect of bird droppings on barley manifested itself similarly to manure. The efficiency of mineral fertilizers was slightly lower than the organic and organomineral systems and amounted to 38-58%.

The conducted long-term studies allowed us to formulate a conclusion that the use of various fertilizer systems on sandy loam in terms of granulometric composition of sod-podzolic soils contributes to an increase in the content of both total nitrogen reserves in the soil and its mineral forms.

Keywords: mineral and easily hydrolyzable nitrogen, yield, manure, bird droppings.

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