Humic preparation effect on white cabbage crop formation and product quality

The article presents the results of a research on the effect of humic preparations of hydrohumin, humimax, potassium humate and «Plodorodiye» humate when cultivating a white cabbage “Extra F1” hybrid on sod-podzolic medium loamy soil. It was found that when cabbage seeds are treated with «Plodorodiye» humate humic preparation at a concentration of 0.01% before sowing, germination increases by 15%. The humic preparation contributed to a more compact and high-quality cabbage seedlings formation (the weight of seedlings increased from 22.0 g in the control group to 25.2 g in the treated plants). When processing seeds and seedlings, the highest yield of cabbage in a 2-year average was obtained from the use of the «Plodorodiye» humate humic preparation - 45.7 t / ha, the increase in yield was 4.0 t/ha (+9.5%). The hydrohumin, humimax, potassium humate preparations increased the white cabbage yields by only 1.5 - 1.9 t/ha. The «Extra F1» cabbage formed the maximum yield of standard products (95.0%) when seeds and seedlings were treated with the «Plodorodiye» humate humic preparation. The quality of white cabbage products did not deteriorate because of the use of humic preparations. In all the experiment variants, the nitrate content in the products was below the maximum permissible concentration. The preparations of potassium humate and «Plodorodiye» humate contributed to an increase in the vitamin C content in the products of 33.6 mg/% (+ 5.3 mg/%) and 38.0 mg/% (+9.7 mg/%), respectively. The sugar content in white cabbage did not. Cultivation of “Extra F1” white cabbage in the southern part of the Pskov region with humic preparation «Plodorodiye» humate treatment is cost-effective, the profitability level amounts to 68.6%.