[Crop rotations productivity and the change of humus content in sod-podzolic soils]
2008
Lapa, V.V. | Ivakhnenko, N.N. | Bosak, V.N. | Lomonos, M.M., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
The effect of rates and correlations of organic and mineral fertilizer on crop productivity and humus content change on sod-podzolic soils in crop rotations with cereals, perennial grasses and root-crop rotation were studied. The yield on sod-podzolic light loam soil in two cycle of rotations with clover meadow at application of organic-mineral fertilizer system (background+N210-630P320-640K610-1220) amounted 98,3-105,3 c/ha f.u. and humus content increasing in soil horizon on 0,13-0,18%. On sod-podzolic loam sand soil in cereals, perennial grasses and root-crop rotation with clover meadow the organic-mineral fertilizer system (N84P40-70K88-126 on the background 12 t/ha manure) provided the yield 87,5-87,7 c/ha f.u. and humus content decreasing in soil horizon on o,18-0,36%. The high productivity of cereal-grasses crop rotation is caused the presence of two fields of clover meadow (Trifolium Pratense) in which the yield of feed units has made 157,3-189,4 c/ha f.u. in the first year and 127,9-155,1 c/ha f.u. in the second year of use. Thus, increasing doses of nitrogen fertilizers promoted the yield of maple pea-oat mixture, winter triticosecale and spring wheat. At the same time yield of clover meadow (Trifolium Pratense) in variants with increasing doses of nitrogen fertilizers decreased
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