In the last 30 years there has been a big change in the acreage of permanent grasslands. Since 1990, the acreage of permanent grasslands has increased by 20% to 1003 thousand ha. Currently, there has been a decrease in the amount of cattle and sheep. Despite this fact, it is necessary to ensure high quality fodder from grasslands in order to assure profitability of farming. Therefore, farmers often opt for restoration. The most efficient way is radical ploughing restoration. This method involves numerous risks for environment. The present thesis examined the influence of radical restoration of grasslands by ploughing on the change in the content of organic carbon, total nitrogen and the C:N ratio in the soil. Field experiments were conducted in two locations on the land of National Stud at Kladruby nad Labem, and also in two locations in Oldřichovice near Třinec. In Kladruby, the samples were obtained from both, restored and indigenous grasslands, whereas in Oldřichovice, the samples were obtained only from restored grasslands. The biggest loss of organic carbon (Cox) and total nitrogen (Nt) was noted in Kladruby n.L. in the sandy soil of the original vegetation since the spring of 2016 to the autumn of 2017. In the soil layer of 0-30 cm there was a decrease of the Cox stock in the soil by 58.2 t·ha-1, the stock of Nt in the soil did not change. At the same location and during the same period, the Cox stock of 35,3 t·ha-1 and the Nt stock of 0,1 t·ha-1 fell on the restored vegetation in the soil layer of 0-30 cm. In the clay loam soil in Kladruby n.L. since the spring of 2017 to autumn 2017 there was a decrease of 27,6 t·ha-1 Cox and 1,4 t·ha-1 Nt in soil layer 0-30 cm on the restored vegetation. In the original vegetation, the Cox content decreased by 16.3 t · ha-1 and Nt by 0.4 t·ha-1. In the Oldřichovice over the house area, since the autumn of 2016 to the spring of 2018, the Cox stock fell after plowing in the soil layer 0-30 cm by 7 t·ha-1 and the Nt supply increased by 0.9 t·ha-1. In the Oldřichovice area under the hill, the Cox stock decreased by 39.2 t·ha-1 in the same period and in the same soil layer and the Nt stock decreased by 1.5 t·ha-1. From the point of view of the depth of soil, the largest amounts of organic carbon and total nitrogen in the upper layer of soil were recorded 0-10 cm. The C:N ratio in the restored and natural grasslands was not statistically different. At the same time, after the recovery in this layer of soil, the biggest loss of Cox and Nt occurred.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:426895 |
| Date | January 2018 |
| Creators | Kadłubiec, Szymon |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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