Abstract
The results of the effectiveness of the application of calcium ammonium nitrate (CAN) in winter wheat crops of the “Moskovskaya-39” variety on the dark-gray forest, heavy-loamy soil in the Ryazan region is presented. The advantage of CAN-a a universal form of nitrogen fertilizer, which has a neutral reaction and creates optimal conditions for feeding plants with nitrogen in the zone of its application, where the main mass of plant roots is located, is revealed. Along with nitrogen, fertilizer contains calcium and magnesium, which are essential for the formation of winter wheat productivity, the exchange of carbohydrates and proteins. In the field experience with winter wheat on soils not saturated with bases, the results were obtained, indicating the effectiveness of a physiologically neutral form of nitrogen fertilizer, which showed an advantage over physiologically acidic fertilizer - ammonia nitrate. Dynamics of the formation of the productivity of sowing showed that the area of leaves reached the maximum sizes by the flowering phase of 61.6-76.6 cm2/plant, the largest value of the indicator 76.6 cm2/plant was in the variant with the use of CAN feeding at a dose of 54 kg/ha of nitrogen. The use of CAN provided a reliable increase in the harvest of winter wheat grain in comparison with ammonium nitrate. The grain harvest in the experiment was 63.7 - 67.1 cents per hectare, statistically close were the values of yield in variants using CAN in doses of 68 and 54 kg/ha of nitrogen, the increase in the harvest was 3.8-5.3% respectively. The creation of optimal conditions for winter wheat during the growing season was accompanied by an improvement in the quality of the grain, in comparison with the variant with the use of ammonium nitrate.
Highlights
IntroductionNPK-60kg of a.i. from autumnFertilizer: N68:200 kg - ammonium nitrate (fractional). NPK-60kg of a.i. from autumnFertilizer: N68:250 kg - calcium ammonium nitrate (CAN) (fractional)
NPK-60kg of a.i. from autumnFertilizer: N68:200 kg - ammonium nitrate
The purpose of the research was to study the effectiveness of the use of various doses of calcium ammonium nitrate (CAN) in non-root top dressing on winter wheat crops of the "Moskovskaya-39" variety on the dark gray forest, heavy loamy soil in the Ryazan region
Summary
NPK-60kg of a.i. from autumnFertilizer: N68:200 kg - ammonium nitrate (fractional). NPK-60kg of a.i. from autumnFertilizer: N68:250 kg - CAN (fractional). In the phase of milk ripeness, the leaf area decreased due to the drying of the leaf tips, but there is a tendency to increase the leaf area in variants No 2 - No 4, the best option was the use of CAN at a dose of 54 kg/ha of nitrogen. Due to the active growth of the leaf area to the phase of milk ripeness, the assimilation surface of winter wheat plants was greater in the variants with the use of CAN by 1.3-1.4 times, in variant No 4, the indicator was 1.4 times higher compared to the 1st variant; in comparison with the first measurement, the top dressing of CAN crops in the 2nd and 3rd variants in different doses contributed to an increase in the leaf area by 1.51-1.67 times, in the 4th variant using water-soluble fertilizersby 1.62 times. The use of various nitrogen fertilizers did not affect the phosphorus content.
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