scholarly journals Урожайні властивості та посівні якості насіння проса прутоподібного залежно від умов вирощування

2018 ◽  
pp. 78-84
Author(s):  
М. І. Кулик ◽  
І. І. Рожко
Keyword(s):  
Soil Fertility ◽  
Seed Yield ◽  
Humus Content ◽  
Plant Part ◽  
Limiting Factors ◽  
Forest Steppe ◽  
Seed Productivity ◽  
High Quality ◽  
Seed Material ◽  
Quantitative Characteristics

У статті обґрунтовано необхідність вивчення проса прутоподібного (світчграсу) як енергетичної культури, сировину якої доцільно використовувати для виробництва різних біопалив: рідких, твердих та газоподібних. Матеріалом для дослідження були рослини та насіннєвий матеріал сорту проса прутоподібного іноземної селекції Кейв-ін-рок. Здійснено спробу визначити оптимальні умови (за гідротермічним коефіцієнтом і з урахуванням родючості ґрунтів) для отримання високого врожаю насіння в умовах України та шляхи підвищення його посівних кондицій. За результатами трьохрічних досліджень встановлено вплив погодних умов веґетаційного періоду на продуктивність насіння проса прутоподібного. Експериментальним шляхом визначено лімітуючі фактори та шляхи їх нівелювання для забезпечення гарантованого отримання якісного насіннєвого матеріалу в умовах Лісостепу. Аналіз результатів досліджень дав змогу встановити вплив біометричних (кількісних) показників генеративної частини рослин (довжини та кількості волотей на рослинах, маси 1000 насінин) на насіннєву продуктивність, що обумовлюють і загальний урожай насіння. Визначено вплив крупності насіннєвого матеріалу та терміну зберігання його на лабораторну схожість насіння у взаємозв’язку з особливостями його формування на материнських рослинах за різних умов вирощування. Necessity of studying switchgrass as an energy crop, raw material of which may be used for producing different types of biofuel such as liquid one, solid and gaseous ones has been substantiated in the article. The foreign experience of obtaining switchgrass seed of high quality has been investigated on the basis of scientific publications. We have established the limiting factors affecting seed yield, sowing characteristics, germination conditions, growth and development of plants in the early periods of vegetation. The attempt of determining optimal conditions (by hydrothermal coefficient and soil fertility) for providing high seed yield in Ukraine as well as ways of increasing seed characteristics has been made. Many years’ experiments were conducted in the central part of Forest-Steppe of Ukraine on two types of soils: high-productive soil with humus content of more than 4 % and nutrient lean soil with humus content of less than 2 %. Research material was plants and seed of Cave-in-Rock switchgrass variety of foreign selection. The methods of testing, field and laboratory experiments, scientific recommendations were applied in the experiment. The experimental results were processed by the dispersion analysis and correlative-regression analysis with application of the computer program Statistics. After three years of investigation, influence of the vegetation period weather conditions on switchgrass seed productivity has been established. The limiting factors and the ways of decreasing their effect in order to provide guaranteed getting of high quality seed material in the conditions of Forest-Steppe of Ukraine have been defined by the experiments. At the same time the effect of soil conditions on the crop seed productivity has been proved. The analysis of the research findings enabled to show influence of biometric (quantitative) characteristics of the generative plant part (length and number of panicles per the plant, mass of 1000 seeds) on seed productivity that affect total seed yield. Besides, influence of seed material size and storage period on laboratory seed germination in the interconnection with seed formation peculiarities on maternal plants in different cultivation conditions has been determined. The yield of switchgrass seeds depends on weather factors and soil fertility. Also we defined influence of quantitative characteristics in the generative plant part – length and number of panicles per the plant, mass of 1000 seeds on seed yield. Laboratory germination of seeds depends on the storage size and the mass of 1000 seeds.

Influence of vermicompost and split applied nitrogen on growth, yield, nutrient uptake and soil fertility in pole type frenchbean (Phaseolus vulgaris L.) in an Acid Alfisol

2017 ◽  
Author(s):  
Akhilesh Sharma ◽  
Raj Paul Sharma ◽  
Viveka Katoch ◽  
G. D. Sharma
Keyword(s):  
Soil Fertility ◽  
Seed Yield ◽  
Growth Yield ◽  
French Bean ◽  
Nitrogen Fertilizers ◽  
Phaseolus Vulgaris L ◽  
Seed Productivity ◽  
Npk Uptake ◽  
Pole Type ◽  
Applied Nitrogen

A field experiment was conducted for two years at Himachal Pradesh Agricultural University, Palampur on the influence of vermicompost and split applied nitrogen in pole French bean. Twelve treatment combinations comprising of organic manures, nitrogen fertilization and methods of application were evaluated. The performance of yield and yield related traits increased significantly with application of vermicompost, 125% of recommended nitrogen through split application. Use of vermicompost + 125% nitrogen resulted in highest seed yield (10.43 q/ha) and NPK uptake. Seed yield and NPK uptake with application of vermicompost + 75% N was at par with that of recommended application of N indicating thereby saving of 25% of nitrogen fertilizers. Split applied nitrogen at 125% of recommended dose resulted in 50% increase in seed yield over basal application. Hence, application of vermicompost and split applied nitrogen is a better option to harness high seed productivity and to maintain soil fertility.

EFFECT OF A MINERAL FERTILIZERS DOSES AND PLANT CUTTING PERIOD TO SEED POTATOES YIELD

1970 ◽  
pp. 58-60
Author(s):  
М. N. Zakharova ◽  
L. V. Rozhkova ◽  
Е. Yu. Ushakova
Keyword(s):  
Winter Wheat ◽  
Viral Infection ◽  
Humus Content ◽  
Field Tests ◽  
Mineral Fertilizers ◽  
High Quality ◽  
New Variety ◽  
Seed Potatoes ◽  
Seed Material ◽  
High Quality Seed

To obtain high-quality seed material, it is necessary to form a crop that has the largest amount of standard seed fraction of tubers in its structure, and plants are less affected by viral infection. To obtain high-quality seed material, it is necessary to form a crop that has the largest amount of standard seed fraction of tubers in its structure, and plants are less affected by viral infection. The research was conducted in 2018-2019 on the experimental fields of ISA. The technology of cultivation of a new variety was studied in the link of crop rotation: peas – winter wheat + white mustard-potatoes – spring wheat. The area of the experiment is 0.25 ha, the accounting area is 10 m2, the repetition is fourfold. The soil of the site: dark gray forest, heavy loam; humus content of 3.15%; potassium is 16.2, phosphorus – 19,6; soil pH is 5.4. Predecessor – winter wheat. Scheme of experience. Application of mineral fertilizers before planting and mowing the tops after flowering: N96P96K96, after 30 days, N96P96K96-45, N128P128K128-30, N128P128K128-45 days. The yield was taken into account (24.09.18 and 23.09.19)with the analysis of tubers by fractions: large, seed and non-standard. Mathematical data processing was carried out by the method of dispersion analysis (Dospekhov B. A. Method of field experience, 1985). In the studies, the following protection systems were used: treatment of tubers with Maxim – 0.4 l/t, spraying with herbicides Lazurit Super-0.5 l / ha + Escudo-0.025 kg/ha, treatment of vegetating plants with fungicides Metaxil-2.5 kg/ha, Thanos-0.6 kg/ha and insecticide Borey-0.15 l / ha. The results of two-year field tests on the effect of different doses of mineral fertilizers and the timing of mowing the tops on the yield of seed potatoes of the eupatium variety in the Ryazan region are presented. It was found that when cultivating seed potatoes using the proposed technology, the crop yield increased from 27.9 to 38.0 t/ha with a seed yield of 39.1 to 48.1%.

scholarly journals RESOURCE-SAVING TECHNOLOGIES OF AGRICULTURAL CROPS SELECTION IN THE ECOLOGICALLY BALANCED SYSTEM OF AGRICULTURE

2018 ◽  
Vol 12 (4) ◽  
pp. 54-60
Author(s):  
Рафил Шакиров ◽  
Rafil Shakirov ◽  
Закиржан Бикмухаметов ◽  
Zakirzhan Bikmuhametov ◽  
Фидаил Хисамиев ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Plant Protection ◽  
Arable Land ◽  
Crop Rotations ◽  
Moisture Loss ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Resource Saving ◽  
High Quality ◽  
Positive Balance

Complex studies were conducted in eight-field grain-steam-crop and grain-steam-tilled crop rotations using the following terms: fertilizer systems, plant protection, basic tillage methods and plastic varieties. Scientific novelty lies in the fact that for the first time in the forest-steppe of the Volga region, on a systemic basis, resource-saving technologies have been developed on the basis of fertile crop rotations in an ecologically balanced, biologized farming system. Agroecological principles of conservation and reproduction of gray forest soil fertility and obtaining a planned harvest of high quality. Experimental substantiation of the role of action and interaction of the main factors of saving technology, in increasing crop productivity of crop rotations, productivity of arable land and soil fertility. Agroeconomic evaluation of the resource-saving technology effectiveness. Crop rotations of leguminous crops and perennial legumes increase the productivity of arable land to 15-20%, provide a positive balance of humus (0.45-0.5 tons per hectare). Organomineralic fertilizer system reduces the need for mineral fertilizers by 2-3 times, ensures the receipt of planned high quality harvest and reproduction of soil fertility. The integrated plant protection system, using biological means and methods, provides a saving of plant protection products to 30-35%, raises productivity to 15-25%. Moisture-resource-saving mode of soil cultivation (mulching various deep loosening without turnover of beds) allows to save 25-35% of fuel and reduce the moisture loss to 35-40%. Complex application of these factors with the use of high-yielding plastic varieties makes resource-saving technology that increases the productivity of cultivated crops and the productivity of arable land by 1.5-2 times, the profitability of production by 30-50% and ensuring the reproduction of soil fertility.

scholarly journals Assessmentof seed productivity of complex hybrid populations of red clover

2021 ◽  
Vol 22 (1) ◽  
pp. 47-46
Author(s):  
I. V. Shikhova ◽  
E. V. Popova ◽  
E. G. Arzamasova
Keyword(s):  
Seed Yield ◽  
Red Clover ◽  
Seed Productivity ◽  
Seed Material ◽  
Yield And Quality ◽  
Sum Of Effective Temperatures ◽  
Phases Of Development ◽  
Beginning Of Flowering ◽  
Complex Hybrid ◽  
Number Of Seeds

In the conditions of the Kirov region, the productivity of seeds of four complex hybrid populations (SGP) of red clover was studied, including those formed against an infectious fusarium background (SGPF). The research was carried out in the nursery for evaluating the seed productivity of 2017 sowing in comparison with the standard (st.) Dymkovsky for 2 years of use (y.u.). The characteristics of the SGP and SGPF according to winter hardiness, the start of vegetation phases of development, plant height, structure of seedgrass stand, yield and quality of seed material are given. All studied varieties were more productive than the standard (1.97 c/ha). Reliably high seed yield on average for 2 years was shown by SGPF-158-3 – 2.48 c/ha, SGP-188 – 2.32 c/ha, SGPF-157-3 – 2.16 c/ha. According to fruiting indicators, in 2019SGPF-158-3 with small heads, but with the largest number of flowers and seeds (132.2 and 77.4 pcs., respectively), good seediness (58.8 %) and high seed weight per head (0.153 g) was selected. Also, high rates were noted in the populations of SGPF-157-3 and SGPF-160-3. A strong correlation between seed yield and fruiting rates was revealed: the number of flowers in the head (r = 0.92), the total number of seeds in the head (r = 0.92), the number of filled seeds in the head (r = 0.94), the seediness of the head (r = 0.90), the total weight of seeds in the head (r = 0.85), the mass of filledseeds in the head (r = 0.87). A close positive correlation was noted between the hydrothermal coefficient (HTC) value and length (r = 0.86), width (r = 0.86) of the red clover head during the intergrowth period “regrowth - the beginning of flowering”. It has been established that the average daily air temperature and the sum of effective temperatures during the “beginning of flowering - ripening” period have a positive effect on the fruiting performance: “seediness of the heads” (r = 0.97 and r = 0.87) and “the number of seeds in the head” (r = 0.95 and r = 0.89, respectively). In the same interphase period, a close negative dependence of the indicated fruiting indices on the HTC values was revealed (r = -0.95 and r = -0.94). The sowing qualities of the seeds of the 2019 harvest were determined; it was found that all seed material corresponds to the category of “original and elite seeds”. As the result of the research, the populations of red clover SGPF-158-3, SGP-188 and SGPF-157-3, superior to st. Dymkovsky on seed productivity (by 0.51; 0.35 and 0.9 c/ha, respectively, LSD05 = 0.12 c/ha) and fruiting indicators, were selected.

scholarly journals 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

2019 ◽  
pp. 8-15 ◽  
Author(s):  
S. I. Kolisnyk ◽  
S. F. Antoniv ◽  
A. A. Zapruta ◽  
V. V. Konovalchuk
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Seed Yield ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Stem Elongation ◽  
Bromus Inermis ◽  
Forest Steppe ◽  
Seed Productivity ◽  
Seed Crops

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.

INFLUENCE OF METEOROLOGICAL CONDITIONS ON ECONOMICALLY VALUABLE SOYBEAN TRAITS

1970 ◽  
pp. 28-31
Author(s):  
Е. V. Gureeva
Keyword(s):  
Seed Yield ◽  
Humus Content ◽  
Soybean Seed ◽  
Weather Conditions ◽  
Growing Season ◽  
Climatic Conditions ◽  
Meteorological Conditions ◽  
Federal State ◽  
Forest Steppe ◽  
Early Maturing

The results of research conducted in 2015-2019 in the forest-steppe agroclimatic zone to identify the dependence of economically valuable traits of soybean varieties on the meteorological conditions of the Ryazan region are presented. The soil of the experimental site is dark gray forest, heavy loamy in granulometric composition. Reaction of the soil solution-phsol. - 5,2; humus content 5,8 %. Mobile phosphorus content – 191.4 mg / kg of soil; exchange potassium content-108.5 mg / kg of soil; nitrate nitrogen-8.4 mg / kg; ammonium nitrogen-1.57 mg/kg. The object of the research were varieties of soybean breeding, FEDERAL state scientific institution "Ryazan research Institute of agriculture" - Mahewa, George, Whale, Light. The work was carried out in accordance with the methodology of the State variety testing of agricultural crops and the methodology of field experience. To characterize the climatic conditions, we used an integrated indicator – Selyaninov's hydrothermal coefficient (GTC). It was found that the duration of the growing season of early — maturing varieties depends more on the weather conditions in july, early-maturing varieties-on the conditions in august. The height of the plant is affected by weather conditions in june, and the weight of 1000 seeds – in july. The yield of soybeans largely depends on the climatic conditions during the main stages of development of the crop. The average yield over the years of the study for varieties was in the range from 1.37 to 1.79 t/ha. The highest yield was recorded in 2015 and 2016 with the GTC close to 1, the lowest yield for varieties was obtained in 2018 with the GTC=0.6. A significant relationship was found between seed yield, seed weight from the plant and the GTC of the growing season: the variation in soybean seed yield by 67% is associated with the action of the studied factors (R2=0.67).

scholarly journals CHANGES IN SEED PRODUCTIVITY OF ECHINACEA PURPUREA DEPENDING ON THE SOWING TERMS AND THE METHOD OF WEED CONTROL

2020 ◽  
pp. 17-23
Author(s):  
В.А. Гущина ◽  
Е.О. Никольская ◽  
Н.Ю. Лобанова
Keyword(s):  
Weed Control ◽  
Research Result ◽  
Echinacea Purpurea ◽  
Early Spring ◽  
High Yield ◽  
Forest Steppe ◽  
Seed Productivity ◽  
High Quality ◽  
Middle Volga Region ◽  
Spring Sowing

Для производства высококачественного фармацевтического растительного сырья необходимо плантационное выращивание лекарственных растений. Однако, это сдерживается ограниченным количеством семян. Одним из главных показателей при оценке успешности внедрения культуры в производство является семенная продуктивность. Поэтому целью исследований является разработка элементов технологии возделывания эхинацеи пурпурной на семена, обеспечивающих оптимальную реализацию потенциала её продуктивности в условиях лесостепи Среднего Поволжья. Экспериментальная работа проведена на черноземно-луговой почве опытного участка ФГБОУ ВО Пензенский ГАУ в 2014…2018 гг. где при подзимнем и ранневесеннем посевах эхинацеи пурпурной изучали различные способы ее защиты от сорного компонента. В результате исследований установлено, что эффект последействия сроков посева и способов борьбы с сорняками сохранился и на второй год жизни. В среднем за три года в первый год пользования эхинацеи на квадратном метре развивается 28…38 генеративных побега, на каждом из которых формируется 366…484 семянки с массой 1,39…1,68 г и выполненностью 74…84 %. Наиболее оптимальные условия для завязываемости семян складываются как на подзимнем посеве, так и на ранневесеннем при ручном удалении сорняков, трехкратной междурядной обработке и внесении гербицида Лазурит СП до всходов эхинацеи с последующей прополкой препаратом Миура в фазе 2-4 листьев сорняков. Урожайность семян при посеве осенью составила 642,3 кг/га, 598,7 и 644 кг/га соответственно. На весенних посевах она на 16…19 % ниже. Таким образом, изучаемые приемы технологии возделывания эхинацеи пурпурной позволяют формировать высокую урожайность качественных семян. To produce high-quality pharmaceutical plant raw materials, the plantation cultivation of medicinal plants is necessary. However, this is finite because of a limited number of seeds. One of the main indicators for evaluating the success of introducing a crop into production is seed productivity. Therefore, the aim of the research is to develop the cultivation technology elements of Echinacea purpurea for seeds that ensure the optimal realization of its productivity potential in the conditions of the forest-steppe of the Middle Volga Region. Experimental work was carried out on the meadow chernozemic soil of the experimental field of the FSBEI of Higher Education "Penza State Agrarian University" in 2014...2018. During the winter and early spring sowing of Echinacea purpurea, various ways of protecting it from the weed component were studied. As a research result, it was found that the effect of the aftereffect of sowing dates and methods of weed control also remained in the second year of plant life. On average for three years, in the first year of planting Echinacea 28...38 generative shoots develop per square meter, each of which forms 366...484 achenes with a mass of 1.39...1.68 g and the plumpness rate of 74...84 %. The most optimal conditions for seed setting are formed both in early winter sowing and early spring one with manual removal of weeds, three-time row-to-row processing and application of the herbicide Lazurit SP before Echinacea seedlings' appearance, followed by weeding with Miura in the phase 2-4 leaves of the weed. The yield of seeds, sown in autumn, counted 642.3 kg/ha, 598.7 and 644 kg/ha, respectively. In spring sowing, it was 16...19 % lower. Thus, the studied techniques of cultivation of Echinacea purpurea allow forming a high yield of high-quality seeds.

scholarly journals Inorganic Fertilizers Application Effect on Helianthus annuus Crop Yield Indicators in Western Azerbaijan

2020 ◽  
Vol 6 (10) ◽  
pp. 143-148
Author(s):  
N. Abbasova
Keyword(s):  
Soil Fertility ◽  
Helianthus Annuus ◽  
Crop Yield ◽  
Seed Yield ◽  
Sunflower Seed ◽  
Fertilizer Application ◽  
High Quality ◽  
Inorganic Fertilizers ◽  
Structural Indicators ◽  
Positive Effect

The paper presents the results of studies of the effect of inorganic fertilizers on the structural indicators of Helianthus annuus crop yield in the western part of Azerbaijan. As a result of the studies carried out, it can be concluded that there was a positive effect when fertilizer application. So, there was an increase in the diameter of the basket by 0.8–2.3 cm, the number of achenes in the basket — 54.7–204.6 pcs, the mass of seeds in the basket — 5.5–24.1 g, and an increase in the mass of 1000 seeds — by 3.5–13.7 g in comparison with the non-fertilizer control. To obtain a high and high-quality sunflower seed yield and restore soil fertility on the irrigated chestnut soils of the Ganja-Gazakh zone, it is recommended that farms use inorganic fertilizers annually at the N120P120K120.

scholarly journals Порівняльна характеристика морфологічних особливостей сортів льону олійного в умовах Правобережного Лісостепу України

2017 ◽  
pp. 136-139 ◽  
Author(s):  
Т. А. Столярчук ◽  
А. М. Кисильчук
Keyword(s):  
Biochemical Composition ◽  
Forest Steppe ◽  
Seed Productivity ◽  
High Quality ◽  
Plant Weight ◽  
Highest Weight ◽  
Growing Conditions ◽  
The One ◽  
The Right ◽  
Number Of Seeds

Сорти льону олійного мають важливе значення для отримання його стабільного врожаю високої якості. Проте для льону олійного виявлена ​​значна варіабельність ознак насіннєвої продуктивності (кількість та маса насіння з рослини, маса 1000 насінин) і біохімічного складу насіння, однак відомості про реалізацію генотипового потенціалу культури обмежені. Саме через таку мінливість ознак льону олійного метою нашого дослідження було порівняння морфології рослин різних сортів під час вирощування саме в умовах Правобережного Лісостепу України. Проведені дослідження показали, що умови вирощування мають вплив на такі генотипові ознаки як висота рослин та кількість коробочок на рослині. Маса 1000 насінин та кількість насінин у коробочці є відносно стабільними показниками і мають незначну мінливість. Маса насіння з однієї рослини залежить від кількості коробочок на рослині, про що свідчить високий коефіцієнт кореляції. Найбільшу висоту рослин за всі роки досліджень мав сорт Лірина, найменшу – сорт Айсберг. Найвищу масу 1000 насінин мав сорт Південна ніч. Кращими за продуктивністю однієї рослини в умовах Правобережного Лісостепу України виявились сорти Еврика, Лірина та Блакитно-помаранчевий. Linseed varieties are of great importance for obtaining stable yields of high quality. However, for linseed, there is a significant variability in the signs of seed productivity (amount and mass of seeds from the plant, mass of 1000 seeds) and biochemical composition of the seeds, but information about genotypic potential realization of the culture is limited. It is because of this variability of linseed characteristics our study was aimed at comparing morphology of plants different varieties during cultivation precisely in conditions of the Right-bank Forest-Steppe of Ukraine. Studies have shown that growing conditions affect on such genotypic signs as height of the plants and number of fruitcases on the plant. Weight of 1000 seeds and number of seeds in the fruitcase is relatively stable and has insignificant variability. Weight of the seeds from one plant depends from number of fruitcases on the plant, as evidenced by the high correlation coefficient. The biggest height of the plants during the all years of research has variety Liryna, the shortest – variety Aisberg. The highest weight of 1000 seeds has variety Pivdenna nich. The best by productivity of the one plant in conditions of Right-bank Forest-Steppe of Ukraine were varieties Evryka, Lirina and Blakytno-pomaranchevyi.

Fertilization System as a Factor of Transforming the Humus State of the Soil

2015 ◽  
Vol 2 (2) ◽  
pp. 39-44
Author(s):  
V. Lopushniak
Keyword(s):  
Crop Rotation ◽  
Podzolic Soil ◽  
Humus Content ◽  
Organic Fertilizers ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Content Increase ◽  
Energy Reserves ◽  
Gross Energy ◽  
Stable Forms

Aim. To establish the effect of different fertilization systems in short fi eld crop rotation on the change in the state of humus in the dark gray podzolic soils in Western Forest-Steppe of Ukraine. Methods. Field studies were carried out in a stationary experiment of the Department of Soil Science and Agricultural Chemistry of the L’viv National Agrarian University; determination of humus content – according to DSTU 4289:2004, and that of its labile forms – in accordance with DSTU 4732:2007, fraction-group composition – by Ponomare- va-Plotnikova’s method, according to the measurement procedure 31-497058-008-2002. Results. The use of organo-mineral fertilizer system in short fi eld crop rotation with the saturation of organic fertilizers of 15 t/ha of crop rotation contributes to the humus content increase by 0.7 % after the third rotation in 0–40 cm layer of dark gray podzolic soil, the increase in the share of stable forms of humic compounds up to 57–59 % and the increase in the ratio of R HA :R FA to 1.3–1.4. The study demonstrated very high dependence of amount of gross energy reserves in the humus on the R HA :R FA ratio. Conclusions. The combined application of organic fertili- zers in the form of manure, non-market of the crop (straw) and siderate, along with mineral fertilizers is re- commended in short fi eld crop rotations of Western Forest-Steppe of Ukraine toensure expanded reproduction of fertility of dark gray podzolic soil, improvement of its humus status, increase in gross energy reserves and the share of the stable forms and humic acids in the humus.

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