ECONOMICS
AGRICULTURE AND PLANT CULTIVATION
Perfect system of application of mineral and organic fertilizers is the main factor for obtaining high level agricultural crop yield with the required quality parameters. The article presents the results of data analysis obtained in dynamics over the last 6 rounds of large-scale agrochemical soil survey in the Republic of Belarus for the period of 1986–2015: for introduction of mineral and organic fertilizers for agricultural crops on arable soils; balance (balance intensity) of supply and removal of nutrients on arable soils is determined; performance of agricultural crops on arable soils is presented. Dynamics of agrochemical indicators of soils arable layer (content of humus, P2 O5 , K2 O, pHKCl) for 2009–2015 is also analyzed. It is determined that on average in 2006–2015 in Belarus mineral fertilizers have been used at the same level, although since 2012 there is a tendency to decrease of this index, mostly due to phosphorus fertilizers. Perfect level of mineral fertilizers application on arable soils of the Republic of Belarus is determined in the amount of minimum 260–280 kg/ha of NPK to obtain agricultural crop products at the level of 50 c f.u./ha. The conducted analysis of application of mineral (nitrogen, potassium and phosphoric fertilizers) and organic fertilizers in regions and in entire republic, determination of nutrients balance in soil is of great importance for further prediction of yields and maintenance of soil fertility, implementation of required doses of mineral and organic fertilizers taking into account the required performance of agricultural crops for the near future.
The article presents materials of experiments with winter wheat (Bogatko and Suite varieties), as well as with chaffy oat (Zapavet variety) and hulless oat (Gosha variety) on sod-podzolic light loamy soil of the North-Eastern part of Belarus. The effect of new compound fertilizer with microelements for pre-sowing application on yield and quality of winter wheat grain, hulless and chaffy oat is studied. It was developed by the Institute of Soil Science and Agrochemistry, as well as liquid compound fertilizer Adob Med (Poland), new compound microfertilizers based on microelement and plant growth regulator MicroSteam – Med L and MicroSil – Med L (Belarus), water-soluble compound fertilizer Nutrivant Plus (Israel) and plant growth regulator Ecosil. The maximum yield of winter wheat grain of Bogatko (74.5 c/ha) and Suite (75.9 c/ha) varieties was at combination of 30 t/ha of manure with application of N20P64K140 + N70 + N40 + N40. Nitrogen fertilizers significantly increased the content of crude protein and crude gluten in the winter wheat grain. The positive effect on increase in crude protein content in the wheat grain of Bogatko and Suita varieties was determined with application of plant growth regulator Ecosil and some fertilizers Adob Med and Ecolist Grains on the background of N20P64K140 + N70 + N40 + N40. The content of crude gluten in grain of both varieties of wheat increased significantly with the use of the plant growth regulator Ecosil, as well as microfertilizer Adob Med, compound fertilizers Ecolist Grains, MicroSteam – Med A and MicroSil – Med L. Chaffy oat of Zapavet variety proved to be more responsive to fertilization - the grain yield was higher than in case with hulless oat of Gosha variety. Application of microfertilizer Adob med on the background of the maximum doses of mineral fertilizers N80P70K120+N40 карб allowed to obtain the highest yield of oat grain (58.0 c/ha), in this variant of the experiment the maximum crude protein content was 14.5 and 17.2 % for hulless and chaffy oat, respectively.
ANIMAL HUSBANDRY AND VETERINARY MEDICINE
One of the most important ways for intensification of production nowadays is transition to new particularly valuable species of fish. Taking into account the ongoing demand for sturgeon products (caviar and meat), aquaculture is practically the only direction allowing to satisfy the market demands for these products. At the same time, each of the producer countries sets certain priorities for which the species structure of reared sturgeon species is being determined, various technologies are applied and corresponding market preferences are formed. The paper presents the main provisions of unified strategy for development of sturgeon breeding in the Republic of Belarus, developed on the basis of modern world knowledge and achievements of Belarusian scientists. The main narrow-profile technological features are described for such fields as caviar sturgeon breeding, meat sturgeon breeding, artificial reproduction and restoration of natural populations. It is shown that at the modern stage two lines are traced – obtaining sturgeon caviar and as a method of compensating the missing fishing resources and growing material for replenishment of natural resources, other directions are of adjacent character and complement the designated ones. Operating fishing enterprises related to sturgeon breeding are analyzed. The main tasks are defined, the main provisions of sturgeon breeding development strategy in the Republic of Belarus are proposed taking into account the current state of production capacity. The proposed strategy for sturgeon breeding development can serve as the basis for implementing measures on practical development of the industry.
MECHANIZATION AND POWER ENGINEERING
PROCESSING AND STORAGE OF AGRICULTURAL PRODUCTION
SCIENTISTS OF BELARUS
ISSN 1817-7239 (Online)