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Influence of Foliar Top Dressing with Microfertilizers on Sunflower Growth, Development and Productivity

Kovalenko Oleh, Domaratskiy Yevhenii, Panfilova Antonina, Korkhova Margaryta, Neroda Ruslan

Ecological Engineering & Environmental Technology

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2024

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Vol. 25, iss. 4

316--324

EN

The purpose of the research is to determine the duration of the interphase period, total water consumption, plant height, yield and quality of sunflower seeds, depending on the characteristics of hybrids and foliar top dressing with microfertilizers. Methods. Experimental studies were conducted during 2020–2021 in the experimental field of Mykolaiv National Agrarian University (Ukraine). Results. It was determined that all the studied microfertilizers extended the duration of interfacial periods of sunflower plants. The largest total water consumption of sunflower plants (2259 m3 /ha) was formed in the hybrid NK Kamen in the variant with foliar top dressing with microfertilizer Quantum, which was 0.9–6.5% more than in the same variant with hybrids Darius and Tutti. The highest height of sunflower plants among the hybrids submitted for study was formed by Darius – 165.7–170.9 cm, which was 5.0–5.7% higher than the height of plants of the NK Kamen hybrid and 7.2–8.0% more than the height of Tutti hybrid. It was found that the highest yield of sunflower seeds (2.55 t/ha) on average over the years of research was formed in the hybrid NK Kamen in the variant with foliar top dressing with microfertilizer Quantum, which exceeded its level in the non-fertilized control by 18.6% and the average yield for all variants of the experiment by 12.3%. The highest yield of sunflower seeds (2.56 t/ha) among the hybrids submitted for study was provided by NK Kamen in 2021, which was 12.3% more than in the Darius hybrid and 6.6% more than in the Tutti hybrid. Foliar top dressing with microfertilizers significantly affected the quality indicators of seeds of the studied sunflower hybrids. The maximum fat content values (from 50.1 up to 52.7%, depending on the hybrid) were achieved by applying Quantum microfertilizer in the 5-6-leaf phase. The conditional yield of oil from seeds in this variant of nutrition is also determined to be the maximum – from 1.13 up to 1.34 t/ha, depending on the hybrid. Less effective for the growth and development of plants and the formation of their productivity was the preparation Rostok, with the introduction of which the duration of the growing season increased by 1-2 days; total water consumption increased by 29–35 m3 /ha; the height increased by 1.1–4.6 cm; seed yield increased by 0.80–0.28 t/ ha; the content fat in seeds increased by 0.02–0.03%; oil seed yield increased by 0.12–0.15 t/ha.

2

Screening of sweet and grain sorghum genotypes for green biomass production in different regions of Kazakhstan

Zhapayev Rauan, Toderich Kristina, Kunypiyaeva Gulya, Kurmanbayeva Meruyert, Mustafayev Mustafa, Ospanbayev Zhumagali, Omarova Aiman, Kusmangazinov Adil

Journal of Water and Land Development

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2023

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no. 56

118--126

EN

As the impact of global climate change increases, the interaction of biotic and abiotic stresses increasingly threatens current agricultural practices. The most effective solution to the problem of climate change and a decrease in the amount of atmospheric precipitation is planting extremely drought-resistant and high-yielding crops. Sorghum can grow in harsh conditions such as salinity, drought and limited nutrients, also it is an important part of the diet in many countries. Sorghum can be introduced in many zones of Kazakhstan. Plant height and yield of green plant biomass of 16 sorghum samples in arid conditions were determined based on a set of agrobiological characteristics for field screening. The height of the studied samples of grain sorghum was 0.47 ±0.03 m, and the height of sweet sorghum was much longer, reaching up to 2.88 ±0.12 m. Also, there was a strong difference in green biomass in cultivated areas under different soil and climatic conditions, the green biomass of sweet sorghum was 3.0 Mg∙ha-1, and in grain sorghum, it reached up to 57.4 Mg∙ha-1. Based on the data of the field assessment for various soil and climatic conditions, the following samples were identified for introduction into production: samples of sweet sorghum for irrigated and rainfed lands of the Almaty Region and in the conditions of non-irrigation agriculture of the Aktobe Region - a promising line ICSV 93046. For non-irrigation agriculture of the Akmola Region, genotypes of sweet and grain sorghum are ‘Chaika’, ‘Kinelskoe 4’ and ‘Volzhskoe 44’.

3

Grazing Exclusion Effects on the Relationship between Species Richness and Vegetation Cover in Mongolian Grasslands

Guo Tong

Polish Journal of Ecology

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2020

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Vol. 68, nr 3

211--228

EN

Understanding the role of plant diversity in maintaining vegetation cover is a central focus of assessing the vegetation dynamics of grasslands. The present study assessed the relationship between species richness and vegetation cover, as well as underlying biological mechanisms in three Mongolian grasslands, namely meadow, dry steppe and mountain steppe. Each of three grasslands was set by two treatments: grazing exclusion by fence and freely grazing. I measured plant species richness, vegetation cover, height and phenology. I examined three biological mechanisms, namely plant interactions, the role of dominant species and vegetation growth periods. The results showed that higher species richness generally increased vegetation cover independent of fencing treatment and grassland type. Plant interactions were the strongest in fenced plots of the mountain steppe. Dominant plant species invested more in vegetation cover rather than the height in grazed plots than fenced ones in Mongolian grasslands. Taking vegetation growth periods into account did not alter the strength and the direction of the relationship between species richness and vegetation cover. I thus infer that examining changes in species diversity will allow for a better understanding of vegetation cover dynamics in grasslands. This will help to assess how ecosystem functioning might be impacted by grazing disturbances in Mongolia.

4

The relationships between morphological traits in maize (Zea mays L.) by linear and rank correlation coefficients

Szulc Piotr, Cyplik Adrian, Bocianowski Jan, Cichocki Marek, Baldys Weronika

Journal of Research and Applications in Agricultural Engineering

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2019

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Vol. 64, nr 4

31--33

EN

The objective of this study was to assess the relationships between ear length, ear diameter, plant height and ear setting height in maize linear Pearson correlation coefficients and Spearman’s rank correlation coefficients. The plant height and ear setting height were positively linear and rank correlated in all four years of study. The correlation coefficients, both - linear and rank, between all four traits observed in 2018 were statistically significant. Ear diameter and plant height were linear and rank correlated in 2018, however in 2015 only Pearson correlation coefficient was statistically significant between these two traits.

PL

Celem badań było zastosowanie współczynników korelacji liniowej Pearsona i rangowej Spearmana do oceny współzależności pomiędzy długością kolby, średnicą kolby, wysokością roślin i wysokością osadzenia kolb produkcyjnych kukurydzy. Wysokość roślin i wysokość osadzenia kolb produkcyjnych były dodatnio liniowo i rangowo skorelowane we wszystkich czterech latach badań. Oba współczynniki korelacji – liniowe i rangowe, pomiędzy wszystkimi czterema cechami obserwowanymi w 2018 r., były istotne statystycznie. Średnica kolby i wysokość roślin były liniowo i rangowo skorelowane w 2018 r., natomiast w 2015 roku tylko współczynnik korelacji Pearsona był statystycznie istotny pomiędzy tymi dwiema cechami.

5

The effect of silicon application on growth of spring wheat under organic farming

Kowalska J., Jakubowska M., Nowaczyk R.

Journal of Research and Applications in Agricultural Engineering

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2018

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Vol. 63, nr 3

20--23

EN

Application of silicon (Si) could greatly boost wheat yield and mitigate abiotic stress, especially drought. A field experiment was conducted during 2017- 2018 at the research farm. Evaluation of impact of different methods of application of two Si fertilizers on growth and parameters of yielding of wheat was made. The treatments consisted of the recommended dose of two used Si fertilizers – Adesil and ZumSil at 10 kg and 0,3 l·ha-1, respectively. Spring wheat cv. Arabella was used in the field experiments. The effect of silicon was assessed by measuring emergence, height of plants, density of spikes and the SPAD index. The number of plants emergence, the height of plants and density of spikes 1m-2 were the highest after application of liquid ZumSil, regardless of the method of application. The study revealed a significant effect of silicon on plant.

PL

Zastosowanie krzemu (Si) może znacznie zwiększyć plony pszenicy i złagodzić stres abiotyczny, zwłaszcza suszę. Doświadczenie polowe przeprowadzono w latach 2017-2018 w gospodarstwie badawczym. Dokonano oceny wpływu różnych, trzech metod stosowania dwóch nawozów Si na parametry wzrostu i plonowanie pszenicy. Zabiegi obejmowały zalecaną dawkę dwóch różnych nawozów krzemowych stosowanych osobno - Adesil i ZumSil w dawce 10 kg i 0,3 l·ha-1, odpowiednio. W doświadczeniach polowych wykorzystano pszenicę jarą, odm Arabella. Wpływ nawozów w okresie wegetacji rośliny oceniano pod kątem ich wschodów, wysokości roślin i obsady kłosów. Liczba wschodów, wysokość roślin i obsada kłosów na ·m-2 były najwyższe po zastosowaniu płynnego ZumSil, niezależnie od metody aplikacji. Obserwacje potwierdziły znaczący wpływ krzemu na rośliny.

6

The effect of habitat on methane emission from an alpine wetland

Chen H., Wu N., Gao Y., Yao S., Wang Y., Tian J., Sun G., Yuan X.

Polish Journal of Ecology

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2009

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Vol. 57, nr 2

377-381

EN

Alpine wetland is a source for methane (CH[4]), an important greenhouse gas, but little is known about how this habitat influences the emission. To understand this wetland habitats were selected at the altitude of 3430 m a.s.l. (in National Wetland Nature Reserve of Zoige, Quingle - Tibetan Plateau) and the methane flux was measured with static chambers in three different sites, including hollows with Carex muliensis Hand - Mazz. and Eleocharis valleculosa Ohwi f. setosa (Ohwi) Kitagawa., grass hummocks composed of Kobresia tibetica Maxim, Cremanthodium pleurocaule R. D. Good, Potentilla bifurca L. and Pedicularis sp. We have found that in alpine wetland these habitats significantly affect CH[4] emissions in the onset (April, 2006) and peak (August, 2005) stages of growing season. Hollows covered with Carex muliensis and Eleocharis valleculosa had higher values of emission than grass hummocks built by several grass species. Slight difference of CH[4] emission was found between two kinds of hollows with Carex muliensis and Eleocharis valleculosa. These results were consistent with the change of water table, which was found best correlated with CH4 emissions (r[^2] = 0.43, P <0.01) in the peak stage of growing season. Directly measured shoot biomass and plant heights were best related to CH[4] emissions (r[^2] = 0.59, P <0.01). However, in the onset stage of growing season, variation of CH[4] emission may not be simply ascribed to changes in water table and vegetation structure.