Published in Scientific Papers. Series A. Agronomy, Vol. LXI, Issue 2
Written by Nicolai LEAH
The harvest of winter wheat on the chernozem cambic in the non-fertilized variant ranged from 1.33 to 3.22 t/ha during 2010-2016. Administration of fertilizers on the natural background on average for 7 years led to the increase of winter wheat yields from 2.51 to 4.75 t/ha, the production increase with 38-89%. On the phosphorus levels the crop yield increased from 19% on the 1.5 mg phosphorus level to 50% on the 3.0-3.5 mg of mobile phosphorus in soil versus the N120K30 background. On the variant P30K30 the increase in yield was 44% in comparison with control variant. At the nitrogen variants with PK in doses of 30-150 kg/ha the increase in wheat yield was 65-89% compared to the control and 20-45% relative to PK variant. The gluten content in average over 7 years ranged from 23.6% on the unfertilized variant to 29.6% on the fertilized variants. The gluten rate was 25% against the witness variant (23.6%), this is the second group of wheat quality. The optimum level of mobile phosphorus in the chernozem cambic for winter wheat cultivation was 3.0-3.5 mg/100 g of soil (Machigin method), and the optimum nitrogen doses were 90-120 kg/ha.
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