Abstract
The territory of the Kirov Region was place to conduct the field experiments on the cultivation and evaluation of the productivity of the green mass of plants of narrow-leaved lupine selected by the specialists of the A.G. Lorch Russian Potato Research Centre. For the growing season of 2022-2023, the amount of green mass per unit area in plants of the lupine varieties Accord, Fedorovsky, and Metsenat was significantly higher than that in the control plants (green pea of the variety Ukaz and field pea of the variety Ryabchik). The content of nitrogen, crude protein and crude ash in the green mass of lupin plants was higher compared to that of pea plants. The amount of exchange energy in the green mass of plants of the studied varieties did not change significantly in 2022 but there were significant differences in this indicator in lupine and pea plants in 2023. The difference reached 30%.
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