Augsnes apstrādes ietekme uz augsnes agrofizikālajām īpašībām vienas desmitgades ietvaros | Influence of soil tillage on soil agrophysical properties within a decade
2021
Vircava, I., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Dorbe, A., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Darguza, M., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Erdberga, I., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture
Minimal tillage is considered desirable and recommended in agriculture; however, there is no unequivocal justification for the advantages or disadvantages of it in the scientific literature due to several factors: bedrock, climate, crop selection and rotation, time. The physico-mechanical properties of the soil are an important factor influencing soil fertility, but the changes caused by tillage are not immediately visible and takes time for the soil to adapt the new conditions. In 2009, a long-term experiment was set up at the LLU Research and Study farm “Peterlauki” with one of the aims to find out the impact of long-term tillage on soil physico-mechanical properties and soil fertility. In the long run, ploughing has a more favourable effect on the agrophysical properties of the soil than minimal tillage technology. The proportion of organic carbon in arable land remains above 1% and is sufficient to ensure soil fertility, observations over the last 3 years show that organic carbon stocks have decreased by 0.6% over three years. The effect of crop rotation on organic carbon accumulation is still disputable; however, the organic carbon stock is more stable in traditional tillage fields, which can be explained by more even distribution of organic matter during soil ploughing. In contrast, in minimal tillage variant, soil compaction processes are likely to affect the rate of decomposition of organic matter.
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