Uman NUH | today: 10/15/2024
| Author(s) | Грищенко В. О., , , | ||
|---|---|---|---|
| Category | The Agronomy | ||
| year | 2023 | issue | Issue number 103. Part 1 |
| pages | 216-244 | index UDK | 581.192: [633.39:631.526.2:631.547 | DOI | 10.32782/2415-8240-2023-103-1-216-224 (Link) |
| Abstract | Introduction. Miscanthus is a lignocellulosic feedstock of particular interest because it combines high biomass yields with low environmental impact. The chemical composition of lignocellulose determines the application potential for effective industrial processing. Goal. To determine the content of mineral elements in plants (leaves, stem) of different types of miscanthus during the growing season. Methods. Laboratory, chemical, analytical, analysis, statistical. The results. the nitrogen content in giant miscanthus plants was significantly higher compared to other species. It should be noted that the nitrogen content was almost the same in the stems and leaves of the studied miscanthus species. The nitrogen content in the plants of miscanthus sugarflower was at the level of 0.21–0.23 %, and in the Chinese miscanthus – at the level of 0.18–0.22 %. In addition, only in Chinese miscanthus did the nitrogen content in plants reliably increase until full maturity. In plants of giant miscanthus and sugar-flowered miscanthus, this indicator did not change significantly. Phosphorus content in miscanthus plants was almost the same in stems and leaves and did not reliably change during the growing season. Thus, the phosphorus content varied from 0.58 to 0.63 %, depending on the variant of the experiment. The content of potassium in the leaves of miscanthus species was significantly higher compared to the stems. Thus, this indicator in the stems was at the level of 1.93–1.99 %, and in the leaves – 1.79–1.88 % or more by 6–8 %. During the growing season, the potassium content also changed unreliably. The content of manganese and iron in the leaves was significantly different from their content in the stems. Thus, the manganese content in the leaves of miscanthus species was 2.1 times higher compared to the stems. The iron content in the leaves of miscanthus species was 9.1–10.5 times higher than in the stems. Sulfur content in leaves from the beginning of regrowth to full maturity of miscanthus plants decreased by 1.3–1.6 times, depending on its species. In stems, this indicator decreased by 1.5–1.9 times. Conclusions. It was established that only the sulfur content in miscanthus plants reliably decreases from the regrowth to the phase of full maturity of the plants. The content of nitrogen, phosphorus, potassium, manganese, iron, zinc, lead and chlorine is almost the same during all phases of miscanthus plant growth. In addition, the content of nitrogen, phosphorus, sulfur, lead and chlorine is almost the same in the leaves and stems of miscanthus species. The content of manganese, iron, zinc and potassium in the leaves is significantly higher compared to the stems. It was determined that the content of nitrogen in miscanthus plants is 0.18–0.25 %, phosphorus – 0.58–0.63, sulfur – 0.06–0.12, lead – 0.10–0.13, chlorine – 0.013–0.022 % depending on the type of miscanthus. The content of potassium in the leaves is 1.93–1.99 %, manganese – 1.85–1.97, iron – 1.15–1.20, zinc – 0.19–0.22 %. The stems contain 1.79–1.88 % potassium, 0.89–0.93 % manganese, 0.11–0.17 % iron, and 0.10–0.12 % zinc, depending on the type of miscanthus. | ||
| Key words | miscanthus, mineral elements, leaves, stem, growth phase, growing season | ||