Mineral fertilizers play an important role in increasing the productivity and yield of tomato plants in the conditions of irrigation. This article presents data on the study of various combinations of mineral elements (N90P80K45 kg/ha), and their influence on photosynthetic processes occurring in plants, and tomato productivity in conditions of the Volga Delta on alluvial-meadow heavy loamy weakly saline alkali soils of the Astrakhan region. Studies have shown that with the correct application of mineral fertilizers, it is possible to positively influence the flow of such an important physiological process in the plant as photosynthesis, contributing to an increase in organic matter and increasing the productivity of tomato plants in the conditions of irrigation. For the formation of the assimilation apparatus of tomatoes, the most effective was the introduction of nitrogen fertilizers. The use of potash and phosphorous fertilizers in a paired combination restrained the growth of the leaf surface of plants. Nitrogen and phosphorus fertilizers had approximately the same effect on the increase in daily increments of plant organic matter and the accumulation of fruit dry matter, which increased the biological yield of tomatoes by 35% compared to the control (without fertilizers). The exclusion of nitrogen or phosphorus from the composition of fertilizers led to a decrease in the yield increase. The use of potash fertilizers did not significantly affect the photosynthetic activity of plants.

Представлены результаты исследований по изучению влияния биопрепаратов Биогумус, Гуми и Альбит на растения раннеспелых гибридов огурца в защищенном грунте. В ходе работы установлено, что своевременные подкормки биопрепаратами отзывчивых на их внесение гибридов, способствовали повышению ростовых процессов растений, от прорастания семян до конца плодоношения, увеличению урожайности и товарности плодов.The article presents the results of studies on the effect of biological products Biohumus, Gumi and Albite on early-maturing cucumber hybrids grown in protected soil. In the course of the work it was found that timely fertilizing with biopreparations responsive to their introduction of hybrids, contributed to the increase in plant growth processes, from seed germination to the end of fruiting, increased yield and marketability of fruits.

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