CONSERVING OF THE RESOURCES
Influence of urease inhibitor on mineral nitrogen content in soil and productivity of winter wheat
- 1 Lithuanian Research Centre for Agriculture and Forestry, Lithuania
- 2 UAB ―Agrodema, Lithuania
The research was performed in 2019-2020 LAMMC at Rumokai Experimental Station of the Lithuanian Research Centre for Agriculture and Forestry. The soil was calcaric luvisol, the granulometric composition was a silt loam on clay Winter wheat, after resumption of vegetation fertilized KAS-32 and Leader 24-6. Nitrogen active substance: 60 + 60 + 30. In I and II fertilizations, these liquid fertilizers were used in combination with a urease inhibitor. Mineral nitrogen in the soil was investigated twice: during the graing milk stage of wheat and after harvest. In the grain milk stage in 2019 the urease inhibitor increased mineral nitrogen by 25,8-30.0%. 2020 the effect of a urease inhibitor on the mineral nitrogen content of the soil has not been found. After the harvest in 2019 in the fields where nitrogen fertilization with urease inhibitor was applied in the 0-30 cm layer of nitrate nitrogen was significantly lower than in the control fields. The effect of the urease inhibitor on winter wheat grain yield was not found in the study years
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