Herbicides effectiveness in system of weed control in maize

The influence of various herbicides and their mix for weeds reduction in maize has been studied. In the potential high weed application of base herbicides Primekstra ТZ Gold, 50 % (3.0 L/ha) or Gvardian Tetra, 67.9 % (3.5 L/ha) together with the surface-active substance – Remix (0,3 L/ha) provided weed control level on 94; 93 %, as a result maintained grain yield was 70 and 69 %, respectively. Under the conditions of the mixed type weeds max death (94 %) was observed due application post-emergence tank-mixture herbicides Primextra T Z Gold, 50 % (3.0 L/ha) and Callisto, 48 % (0.25 L/ha) as well as adjuvant elektron (0.25 L/ha) at the same time kept grain yield specified agricultural crop was 66 %.

Influence of hydrothermal conditions on the productivity of perennial grasses in South Steppe of Ukraine

The purpose is to determine the productivity of perennial legume and cereal grasses under conditions of natural moisture supply in South Steppe of Ukraine. Method. The studies were conducted during 2016—2018 using conventional methods, and the output of feed units, digestible protein per unit of area was determined by reference books. Results. On average over three years of research, the highest yield of leaf-stem mass of cereals was formed by Bromus inermis and Elytrigia medium tender – 11.6 and 11.2 t/ha, respectively. The lowest yield was formed by Agropyrum pectiniforme – 7.6 t/ha. Among the all legume grasses, Melilotus albus prevailed (14.8 t/ha). Medicago sativa and Onobrychis arenaria were able to form a similar yield (14.5 and 13.5 t/ha, respectively) under the arid conditions of South Steppe of Ukraine. Insufficient rainfall in 2017 caused a decrease in the productivity of the studied crops. Thus, in 2017 the average yield of green mass in the experiment was 10.3 t/ha, while in 2016 under more favorable weather conditions this figure was 13.2 t/ha or 28.2 % more. The highest output of feed and protein units (FPU) per unit of area under cereal grasses was provided by Bromus inermis (2.35 t/ha). The lowest one was recorded in Agropyrum pectiniforme (1.60 t/ha). FPU output per unit of area under legume grasses increased respectively. Lotus corniculatus provides less green mass and therefore dry matter and forage and protein units. Perennial cereals grasses do not prevail over legume grasses, so they do not spread in South Ukraine. Conclusions. The productivity of perennial grasses in the south of Ukraine significantly depends on the type of plants, weather (hydrothermal) conditions of the year. The most effective is the cultivation of perennial legumes, namely Melilotus albus, alfalfa, Onobrychis arenaria. Bromus inermis and Elytrigia medium prevail among cereal grasses.

Manifestation of transgression on the productivity traits of soybean hybrids of the second generation (F2)

The purpose. To establish the rate and frequency of transgressions in terms of the productivity of soybean hybrids of the second generation. Methods. Field method (phenological observations), laboratory method (evaluation of the material under research). Results. The frequency and rate of positive transgressions of soybean populations of the second generation (F2) have been assessed. Combination Izumrudna/M № 14 has been allocated by a complex of valuable farming traits (the number of productive nodules, number of beans per plant, number of seeds per plant, weight of seeds per plant). In addition, transgressive forms in other studied combinations have been identified, which will allow to obtain the best hybrids for further study. Conclusions. A high level of frequency and rate of manifestation of positive transgressions in soybean populations of the second generation has been established. The greatest number of positive transgressions has been found by the following traits: plant height, number of productive nodules, number of beans per plant, number of seeds per plant and weight of seeds per plant. Combinations Izumrudna/M № 14, Amethyst/M № 24, Triada/Rhapsodiya and Khutoryanochka/M № 7 have been characterized by a significant rate and frequency of positive transgressions according to the above-mentioned traits.

Feed productivity of sainfoin in the conditions of the right-bank Forest-Steppe

The purpose of the research was to study the effect of planting time on the formation of productivity of Hungarian sainfoin when grown for green forage. Methods are field, laboratory, statistical, correlation and regression relationships. Research results. It is established that under uneven humidity and high temperature regime in the year of sowing, Hungarian sainfoin formed two yields under spring planting date and one yield under summer planting date. In the second and third years of growth, no significant effect of the planting date on the stages of organogenesis of Hungarian sainfoin was found, where the maturity of the herbage was reached simultaneously. Productivity of Hungarian sainfoin was only conditioned by hydrothermal conditions, where the yield of green mass averaged 45.9—49.6 t/ha with crude protein content of 1.58—1.73 t/ha. At the same time, the highest dry matter yield of 10.25 t/ha and crude protein of 1.73 t/ha was provided by agrophytocenosis when sown on April 12. The productivity index of Hungarian sainfoin in the first year of life was determined, where the highest indicator was obtained during the early spring sowing period (29.04) – 7.85 kg/ha of dry matter per 1 hour of light day, whereas for the recommended summer sowing period was 1.13 kg/ha, or 6.9 times lower. The correlation equation between dry matter output, duration of daylight and the sum of precipitation from full shoots to the beginning of flowering in the first year of life is described. It is found that with increase of precipitation by 1 mm the dry matter output increases by 1.53 % and there is a tendency increase with increasing the length of daylight by 1 minute. Conclusions. It has been established that on gray forest soils of the right-bank Forest-Steppe, over two years of intensive use of the grass stand, regardless of hydrothermal conditions, Hungarian saifoin provided a stable forage productivity when sown in spring. Thus, dry matter yield was 9.38—10.25 t/ha with crude protein content of 1.58—1.73 t/ha. In particular, as for summer planting date, July 20 appeared to be the most effective planting date, which provided dry matter yield of 9.78 t/ha with crude protein content of 1.61 t/ha.

Formation blue lupine productivity under different options of fertilization and seed treatment

Purpose. To increase the yield of blue lupine due to the intensification of the generative development of plants and maximum preservation of fruit elements by the phase of full ripeness by introducing the optimal dose of mineral fertilizers and foliar nutrition with a microfertilizer in chelated form at the optimum time, application of a bioinoculant and biofungicide. Methods. Field (to study the interaction of the research object with biotic and abiotic factors); morphophysiological (for biological control over the development of productivity elements at the stages of organogenesis); weight (to establish the parameters of the crop structure elements and determine the grain yield); statistical (statistical processing of research results). Results. The results of studies on the effects of different doses of mineral fertilizers, bioinoculant and biofungicide as well as foliar nutrition with microfertilizer in chelated form at different stages of organogenesis on the generative development of blue lupine plants of cultivar Peremozhets and grain yield are presented. The optimal dose of mineral fertilizers and the duration of plant foliar nutrition were determined. Conclusions. Application of the calculated dose of mineral fertilizers for the planned yield of grain of blue lupine of cultivar Peremozhets at the dose of 3.5 t/ha of mineral fertilizers (N68Р48К66), sowing with seeds treated with BTU-r bioinoculant (1 l/t) and MikoHelp biofungicide (1.0 l/t), foliar nutrition with Tropicel microfertilizer (0.3 kg/ha) at the second phase of plant organogenesis contributed to the intensification of their generative development (the number of flowers – 38.0 pcs., beans – 13.3 pcs./plant, which was 1.8 times higher than in the absolute control) as well as an increase by 39.3 % of the crop yield with a control indicator of 2.01 t/ha.

Technological factors for the application of the Medax Top plant growth regulator in seed crops of Bromus inermis under conditions of the right-bank Forest-Steppe of

Purpose. To develop the element for regulating the formation of seed yield and the seeding properties of Bromus inermis through the application of Medax Top growth regulator from the time of tillering to the stem elongation of seed crops. To establish its effect on the growth of plants, their height, productive density, the number and mass of grains in inflorescences, the power of growth and seed germination. Methods. Field, visual, measuring, weight, quantitative, test sheaf method, laboratory, mathematical and statistical. Results. The results of scientific research aimed at creating favorable conditions for the formation of seed productivity of Bromus inermis and its seeding properties through the application of Medax Top plant growth regulator in the sixth-eighth period of organogenesis, i.e. from the beginning of tillering to the stem elongation of seed crops are presented. Its effect on increasing plant resistance to lodging, reducing plant height, increasing productive shoot formation, the number and mass of grains in inflorescence, improving seeding properties, in particular, the power of growth and seed germination, which contributed to the formation of seed yield of 343—354 kg/ha or 47—58 kg/ha more compared to the control without application of the plant growth regulator. Conclusions. Application of Medax Top plant growth regulator at the rate of 0.5—1.0 l/ha in the seed crops of Bromus inermis of Vseslav cultivar during the growing season is effective from the beginning of tillering to the stem formation, it contributes to an increase in its seed productivity by 5.0—21.2 % and provides conditional net profit of 5,179—5,288 UAH/ha.

Triticale for late autumn sowing

Taking into account tendencies in climate changes towards continentality escalation, new ways to ensure stable production of food grain are searched for. Creation of triticale varieties with late sowing in autumn and early sowing in “February windows” (temporary thaws in February – at the early of March) is quite promising. This allows plants to effectively use soil moisture, stages of plant organogenesis occur earlier, and, as a result, crucial periods of the plant development do not coincide with the most intense droughts and take place at lower air temperatures. The aim of the research was to evaluate the yield capacity of triticale varieties and lines with late autumn sowing and to create wintering triticale lines with high grain yield and adaptability. Methods. Field (to study the interaction of the object of research with biotic and abiotic factors); biometric and weighing (to determine grain yield); statistical (statistical processing of research results). Results. The study on the productivity formation was carried out under late autumn sowing of triticale varieties and lines (the first decade of October) under conditions of Kharkiv region. The yields of spring triticale varieties under late autumn sowing averaged over the years amounted to 5.11–6.13 t / ha. Moreover, they formed a large filled grain (weight of 1,000 grains is 42.1–47.2 g). The best yield indicators by the years of research was showed by the variety Boryvіter Kharkivskyi– 6.13 t / ha, which exceeded the standard Korovai Kharkivsky by 1.02 t/ha. The highest yield under late autumn sowing was formed by two-handled cultivar Pidzymok Kharkivskyi and the line L5 (respectively 7.43 and 7.59 t/ha). They exceeded significantly the standard winter triticale variety Raritet by their yield (5.61 t/ha). As a result of the assessment, eight complex valuable triticale lines suitable for late autumn sowing (wintering lines) were identified: TKhZ 12p-19, TKhZ 15p-19, TKhZ 16p-19, TKhZ 31p-19, TKhZ 39p-19, TKhZ 66p-19, TKhZ 68p-19 and TKhZ 96p-19. The lines are characterized by increased productivity, well-filled grain (8–9 points), resistance to lodging (optimal height is 96–111 cm). According to the growing season they are early and mid-ripening. The lines are resistant to damage by loose and hard smut, powdery mildew and have increased resistance to damage by stem rust, leaf rust and leaf septoria (7–9 points). Increased adaptability of the lines is ensured by cold resistance and drought resistance. Therefore, they are the most promising for growing in arid steppe regions at late autumn and winter sowing. The use of triticale varieties and lines with increased productivity, resistant to lodging, suitable for late autumn sowing is important under conditions of increasing aridity of the climate and significant increase in the sowing area under row crops (corn, soybean, sunflower, etc.).

Botanical composition of winter wheat crops depending on the effect of its predecessor

The results of the long-term research on weed infestation of winter wheat agrophytocenoses considering the effect of the predecessor are presented. The influence of three common predecessors in the technology of winter wheat cultivation, namely, corn, soybean and corn, is estimated. It has been proved that the most favorable conditions for controlling the number of weeds in winter wheat agrophytocenoses are differently achieved in different years when clover is used as a predecessor. It has been established that the use of the optimal predecessor under winter wheat allows to reduce weed number per unit of area ​​up to 13—18.7 %.

Experimental substantiation of new criteria for silage quality evaluation

Purpose. To substantiate new criteria for evaluation of corn silage quality with bio-preservatives. Methods. Zootechnical method to determine feed digestibility in animal experiments. It is incorporated in amphorae of 1.8 tons of corn silage mass of the beginning of wax ripeness. The first amphora was without preservative, the second was with bio preservative No. 1 and the third one was with bio preservative No. 2. The silo of 3 amphorae according to the standard was evaluated. In all 3 amphorae, the silo was of good quality, but the digestibility of dry matter in the balance experiments on the rams was different. Results. The most commonly accepted criteria for evaluating silo quality are its pH value and the solids content. The high quality silo has a pH of water extract in the range of 3.6—3.9. Such pH values are created by the high content of lactic acid and low ammonia content. Under these conditions, the nutrient retention in the silage feed is the highest compared to other acidity parameters. Thus, under pH higher than 4.4 and dry matter content of 30 %, the fermentation in the silo process takes place by the proteolytic type and, as a result, butyric acid, amines and ammonia, not lactic acid, are formed. Due to the fact that butyric acid is much weaker than lactic acid and thus has a low preservative capacity, the silo is of poor quality. Therefore, high levels of ammonia, amines and butyric acid cause poor quality of the silo. High quality silo contains up to 20 % free acids (2/3 – lactic acid and 1/3 acetic acid). Our research has shown that silage packed with bio-preservatives based on lactic and propionic acid bacteria has a higher digestibility of nutrients than the same starting mass (raw material), which is ensiled without a bio-preservative. Lactic acid bacteria synthesize B vitamins (B1, B2, B5 and B7) and essential amino acids, and propionic bacteria further synthesize vitamin B12, forming mucus and giving the silage a specific, pleasant taste, providing better feed for animals, e.g. cows, substances, which is a consequence of the higher productive action of the feed. Digestibility of dry matter of silage, which was incorporated without a biological preservative, was at the rate of 53.9 %, and it was 8.8 % higher with bio-preservative No. 1. Studies conducted with an air-dry matter of 3 silos to obtain a suspension have provided the basis for evaluating bacterial preservatives for their ability to stimulate the growth of microbial protein in the silage. Conclusions. On the basis of the conducted researches new criteria for evaluation of corn silage quality were experimentally substantiated. Indicators of high-quality silage, namely, pH, total acidity, lactic, content of acetic and butyric acids and ammonia, include the digestibility of dry matter in animals, and the determination of bacterial protein as an important factor in the influence of lactic and propionic acid bacteria of bio-preservatives on the biological value of feed protein, which is a criterion for evaluating biological preservatives for the ability to stimulate bacterial protein gain in silage.

Content of neutral-detergent insoluble crude protein of alfalfa depending on the phases of its vegetative development

The results of chemical analysis of alfalfa samples in different phases of its vegetative development are presented. These studies have shown that the content of neutral detergent insoluble crude protein fluctuates depending on the mowing phase within the rate of 17—25.6 %. The content of neutral-detergent fiber exceeds the content of saturated fiber by 18—22 %, which must be considered when balancing cattle diets.