ZESZYT Nr 4 / 2010 Abstrakty Volume No 4/2010 Abstracts |
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| 2. The content of some micronutrients in rendzina soil cultivated using different tillage systems and catch crops - Piotr Kraska Abstract. The research was carried out in 2006/2007–2008/2009, using the experiment started in 2005 on Bezek experimental farm, the property of University of Life Sciences in Lublin. The experimental fi eld was set on a medium-heavy mixed rendzina. The aim of the research was to estimate the impact of different tillage systems and different catch crops in spring wheat monoculture on the levels of Zn, Cu, Mn, Fe on topsoil. Two-factor fi eld experiment was established with split-plot method in four replitcations. The fi rst factor included plough tillage (A) and two variants of conservation tillage with autumn (B) and spring disking © of catch crops. The second factor covered four methods of fi eld reclamation in spring wheat monoculture in the form of undersown crops (red clover, westerwold ryegrass) and stubble catch crops (lacy phacelia, white mustard). Fields without catch crops were the control treatments. Plough soil tillage system increased the level of Cu, Mn, and Fe in arable soil in comparison with both methods of conservation tillage. The content of zinc was signifi cantly lower on conservation tillage treatments with autumn catch crop incorporation than on the treatments with plough soil tillage, and with conservation tillage involving spring catch crops disking. The highest level of zinc was found on the treatments with red clover seeding, a copper and iron – on the treatments with red clover and lacy phacelia, and manganese – in the control plots. In spring, the levels of copper, manganese and iron in the soil were signifi cantly higher than in autumn. As for zinc, its level in spring was signifi cantly lower than in autumn. The levels of copper and iron in soil were signifi cantly increasing, and the content of zinc – decreasing with every consecutive year. The content of micronutrients in the soils of 0–20 cm deep did not exceed their natural level, characteristic of this type of soils. key words: tillage systems, catch crops, micronutrients |