Value of photosynthesis in growing meadow clover depending on technology elements
2021
Kovalenko, V., National Univ. of Life and Environmental Sciences of Ukraine, Kiev (Ukraine) | Kokovikhin, S., National Academy of Agrarian Sciences of Ukraine, vil. Naddniprianske, Kherson (Ukraine). Inst. of Irrigated Agriculture | Dobrovolska, E., State Agrarian and Engineering Univ. in Podilya, Kamianets-Podilskyi (Ukraine) | Korzhenivska, N., State Agrarian and Engineering Univ. in Podilya, Kamianets-Podilskyi (Ukraine) | Kozak, O., State Agrarian and Engineering Univ. in Podilya, Kamianets-Podilskyi (Ukraine)
The indicator of the net productivity of photosynthesis, which is presented in the work, more fully than the leaf area, reflects the real possibilities of agrobiocenosis for the synthesis of organic matter. The performance of photosynthesis of each individual plant, as well as agrocenosis as a whole, is due to many factors, therefore, it is important to develop a set of measures aimed not only at meeting the needs of plants in moisture and mineral nutrition, but also to promote their functioning. It is established that the net productivity of meadow clover grasslands photosynthesis increases with the leaf surface index of 3.5. At the same time, the achievement of higher indicators is gradually decreasing, regardless of the mineral nutrition variety, levels and plant density. It was also revealed in our research that the highest indicator of net productivity of meadow clover photosynthesis of cultivars Agros-12 and Marusia of the second year of vegetation in the first mowing was recorded without weeding. In the same cutting of meadow clover of the second year of vegetation on a variant with inoculation of seeds and added fertilizers in the norm of N60Р60К90 at cultivation of meadow clover sowing the lowest indicator of net productivity of photosynthesis was noted. In the second cutting the indicators of net productivity of photosynthesis were revealed like this: the maximum indicators on the variant without fertilizers and inoculations and the minimum on the variant for cultivation with the introduction of fertilizers in the standard of N60P60K90 and seed treatment with rhizotorphin. It is one of the most important parameters with which the yield level correlates.
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