FERTILIZER SYSTEM OF ZUCCHINI AND SQUASH ON ALLUVIAL-MEADOW SOILS OF THE MOSCOW REGION
The results of studies of fertilizer zucchini and squash on alluvial-meadow soils of the Moscow region are given in the article. Fertilizer system of zucchini hybrid F <sub>1</sub> Belogor, consisting of adding N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> under cultivation of and of zeolite norm 0.4 t/ha. It provided yield increase of fruits by 42.9%. N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> and Tenso cocktail ensured yield increase by 39.4% with NSR <sub>05</sub> = 1.7 t/ha and NSR <sub>05 </sub>= 1.3t/ha for fertilizers. N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with zeolite and N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with Tenso cocktail helped to increase solids in zucchini fruits by 3.4-5.1%, N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with Tenso cocktail increased vitamin C by 33.3%, N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with zeolite increased monosaccharides by 7.8%, N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with Humistar and Tenso cocktail increased the amount of sugar by 18.5% compared to the control. The minimum content of nitrates in the fruits was noted for N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with zircon (378 mg/kg) and maximal for N <sub>90</sub>P <sub>90</sub> (660 mg/kg). Nitrate content in the fruits for N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with Tenso cocktail has appeared to be on the MPC level and it was 400 mg/kg. Fertilizer system of squash varieties Cheburashka, consisting of adding N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> under cultivation and of foliar treatment of plants in the budding phase by zircon norm 1ml/10 liters of water provided the increase of fruit yield by 47.4% with high quality products. N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with biocompost ensured yield increase by 43.9% with NSR <sub>05</sub> = 1.4 t/ha and NSR <sub>05</sub> = 1.2 t/ha for fertilizers. The maximum content of solids in the fruit (6.8%) and the amount of sugar (3.18%) was provided by P <sub>90</sub>K <sub>120</sub>, vitamin C (8.8 mg%) - N <sub>90</sub>P <sub>90</sub>K <sub>120</sub> with zircon. The lowest content of nitrates was observed in the control variant, it was 365 mg/kg.