Effect of minimum and conventional soil tillage on capillare porosity in the plough layer | Minimālās un tradicionālās augsnes apstrādes ietekme uz kapilāro porainību aramkārtā
2015
Berzins, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Ruza, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Sprincina, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Grinvalds, M., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Lankovskis, E., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Ozols, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture
The aim of the study was to determine the effect of minimum soil tillage on soil capillary porosity in comparison with traditional soil tillage used by many farms. The capillary porosity in the plough layer was determined with traditional and minimum tillage in spring and autumn using cylinders with the capacity of 100 cm**3 and the height of 5 cm. Sampling depths were: 0–5; 5–10; 10–15; 15–20; 20–25 and 25–30 cm. Capillary porosity was determined in spring 2 weeks after drilling or soil tillage and in autumn after harvesting. The data mathematical analysis was performed by the variance analysis method used for the calculation of significant difference at confidence interval LSD sub(0.05) and variant impact indicator η%. The results of soil capillary porosity were similar in the depth from 20 to 30 cm. It is understandable because the traditional tillage decreases soil treatment when ploughing at the depth of 20–22 cm. The analysis of changes of soil capillary porosity in spring in treatments with soil shelling at the depth from 0 to 5 cm (minimum tillage) shows that capillary porosity in spring is significantly higher because deeper layers of soil are compacted. It creates favourable conditions for seed germination: loose surface and dense seed bed ensure the access of moisture through capillaries to crop seeds thus increasing the yield.
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