[The influence of fertilization systems on agrochemical properties in different crop rotations on a sandy loam soil]
2000
Greimas, G. (Lithuanian Inst. of Agriculture, Dotnuva (Lithuania))
The results of investigations of fertilization systems in various crop rotations (forage, cereal crop and field) are presented in this article. The experiment was carried out on a fluvoglacial soddy-podzolic sandy loam soil at the LIA, Voke Branch in 1979-1996. The influence of fertilization systems on soil agrochemical properties is described in this paper. The application of 52 t/ha of manure every year markedly blocked a decline of soil pH and increased the sum of sorbed bases in the soil in the forage crop rotation (67 row crops). Both fertilization systems (organic and organic-mineral) increased the content of available P2O5 and K2O in the soil sa well as the content of humus. It was more efficient to apply the organic-mineral fertilization system in the field crop (50 cereals) and cereal crop (@83 cereals) rotations. This fertilization system decreased acidification rates of the soil. The application of 104 t/ha manure with N300P162K362 once per rotation increased the content of available P2O5 and K2O. The amount of humus in the soil in this case increasedmore significantly. Fertilization with mineral fertilizers only (mineral fertilization system) had a negative effect on the soil because it increased mineralization of soil humus in both rotations. This fertilization system very negligible increased the amount of available P2O5 and K2O in the soil
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