The use of MaxiMarin granulated adsorbent (30 kg/ha) remains an effective measure to improve the moisture supply of giant miscanthus plants in the fourth year of vegetation, on average, 4.5 cm taller plants were obtained, and in the phase of the beginning of bushing, the difference between the control variants of the experiment was 12.5 cm. Also at the time of active vegetation (10.08) with the application of potassium humate (Gumifield) 50 g/ha was obtained on 8.5 cm of higher plants, while the application of potassium humate (Gumifield) 50 g/ha + anti-stress AminoStar, 1.0 l/ha provided an increase in the height of the highest shoot by 12.7 cm.
At the time of weeding, 38.16-43.74% of dry matter was obtained, in August the content was 44.70-46.52%, and at the time of panicle formation of miscanthus plants - 49.40-52.34%. If we observe the dynamics of changes in the indicator within different years of research, then in the conditions of 2020-21, an increase in the content of dry matter in the stems was observed, and when in 2020 it was obtained in the phases of bushing, mid-vegetation and panicle formation, 41.8%, 44, 7%, and 50.8%, then in the 21st year the increase was 1.94%, 1.82% and 1.54%, and in the conditions of 2022, they received a decrease in phases by 5.58%, 1.82% and 2.94%. Such differences in the accumulation of dry matter in the conditions of 2022 were caused by an anomalous spring, when seedlings appeared in early April and were subsequently destroyed by frost, and therefore the regrowth of miscanthus plants began in the second half of the month and required additional energy inputs with rice. At the same time, the lack of precipitation in May-July and high temperatures in June-August also affected the formation of dry matter content.
According to the content of chlorophylls in the leaves of giant miscanthus at the stage of panicle formation in 2022, in general, according to the experiment, chlorophyll a was 3.99 mg/kg, b - 2.71 mg/kg, and the sum of chlorophylls - 6.70 mg/kg . It was also established that the use of such factors as inoculation of giant miscanthus plants and introduction of adsorbent did not reliably affect the change in the content of chlorophyll in plant leaves. At the same time, in the variants of inoculation of crops with AZOPHOSPHORINE, the use of foliar fertilizing with potassium humate (Gumifield) 50 g/ha initiated an increase in the content of chlorophyll a by 0.16 mg/kg in the basic variant and in combination with hydrogel by 0.24 mg/kg. And the complex treatment of crops with Humate potassium (Gumifield) 50 g/ha + Antistress AminoStar, 1.0 l/ha ensured an increase in the content of chlorophyll by 0.04 mg/kg and 0.19 mg/kg, respectively. Complex treatment with humate and anti-stressor also affected the content of chlorophyll b and their amounts, which were 0.14 and 0.19 mg/kg and 0.39 and 0.38 mg/kg higher than the control variants.
In terms of the effect on the photosynthetic potential, inoculation with AZOPHOSPHORINE had a positive effect on the formation of the trait, and in 2020 an increase of 0.19 thousand m2/ha×day was obtained, in 2021 by 0.24 thousand m2/ha×day, and in 2022 by 0.20 thousand m2/ha×day. Also, the introduction of MaxiMarin granulated adsorbent contributed to the increase of photosynthetic potential by 0.18 thousand m2/ha×day, 0.21 thousand m2/ha×day and 0.18 thousand m2/ha×day over the years of research. And due to the complex influence of factors (inoculation and hydrogel) and treatment of crops Potassium humate (Gumifield) 50 g/ha + Antistress AminoStar, 1.0 l/ha during the years of research we obtained the maximum indicators of the photosynthetic potential of crops - 3.26 thousand m2/ ha×day in 2020, 4.23 thousand m2/ha×day in 2021 and 3.58 thousand m2/ha×day in 2022.
In the conditions of 2020 and 2021, a good level of moisture supply contributed to obtaining 1.0 t/ha and 2.9 t/ha more dry matter after inoculation with AZOPHOSPHORIN, while with the application of MaxiMarin granu
