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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012)
Author(s): Kutra, Ginutis;Aksomaitienė, Ramutė
Title: Use of nutrient balances for environmental impact calculations on experimental field scale
Is part of: European journal of agronomy. , Vol. 20, iss. 1-2 (2003)
Extent: p. 127-135
Date: 2003
Keywords: Nutrient balance;Crop rotation;Leaching;Crop yield;Agronomic efficiency
Abstract: Nitrogen (N) leaching was analyzed in relation to nutrient use efficiency, N balance, and mineral N content in the soil in different crop rotations. In spring in the field occupied by sugar beet mineral nitrogen content was 87.8 +/- 10.9 kg N ha(-1) per year, and after harvest there was a decrease to 46.0 +/- 15.7 kg N ha(-1) per year. In the fields under winter and spring grain crops, these values were 102.6 +/- 54 and 80.5 +/- 32.8 kg ha(-1) per year, respectively in spring, and 76.0 +/- 46.1 and 79.6 +/-34.9 kg N ha(-1), respectively, after harvest. The highest leaching from the fields where sugar beet and grain crops were grown was from 7.3 to 39 kg N ha(-1) per year, compared to 2-17.1 kg N ha(-1) per year from fields with perennial grasses in the rotation. The leaching from sugar beet fields was attributed to mineralization of large amounts of organic residues (tops and small roots) left in the field after harvesting. The quantity of organic matter left after harvesting sugar beet was 2480–7270 kg dry matter (DM) ha−1, compared to barley harvest (490–1150 kg DM ha−1) or winter wheat harvest (1890–2270 kg DM ha−1). The most negative N balance during the 5-year period was in the field with perennial grasses with a total of −426 kg N ha−1. The highest positive balance was for the field with sugar beet in the rotation (+174 kg N ha−1). In the field where cereals dominated the surplus of N was +74 kg N ha−1
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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