Influence of seeding rate and growth regulator "Vermiyodis" on photosynthetic and seed productivity of winter rape
Abstract
I. Sendetskyi*, M. Bakhmat, V. Sendetskyi and I. Shuvar
The purpose is to investigate the effect of seeding rates of growth regulator "Vermiyodis" with different methods of application on the formation of photosynthetic and seed productivity of winter rape Cheremosh and Mercedes hybrid in the Western Forest-Steppe. Methods are field, analytical and statistical. Results: Studies have shown that pre-sowing treatment of winter rape seeds by single and double spraying of plants during the growing season at different seeding rates significantly improved the photosynthetic and seed productivity of winter rape. It was found that the highest yield of winter rape Cheremosh was obtained in the sowing variant of 0.8 million/ha of sprouting seeds by pre-sowing treatment of seeds with growth regulator "Vermiyodis" and double spraying with the same agent. It averaged 4.24 t/ha over the years of research, which is 0.63 t/ha higher than the control indicator and 0.33 t/ha of similar variants at seeding rates of 0.6 million/ha and 0.47 t/ha at seeding rates of 1.0 million/ha of sprouting seeds. On the same variant of fertilizer, on average over the years of research, the highest yield of winter rape hybrid Mercedes was obtained-4.13 t/ha (+0.61 t/ha compared to control) at seeding rates of 0.6 million/ha of sprouting seeds, which is more by: 17.3% compared to the control; by 17.0%-at seeding rates of 0.8 million/ha of sprouting seeds; by 15.1%-at seeding rates of 1.0 million/ha of sprouting seeds.