[Impact of fertilizer system on the perennial grasses yield on sod-podzolic porous loamy sand soil]
2007
Soroko, V.I. | Pirogovskaya, G.V. | Rusalovich, A.M. | Sazonenko, O.P. | Katser, E.N. | Isaeva, O.I. | Mashinskij, P.G.,National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
Data on differences of perennial grasses species in organic matter accumulation by roots residue are presented. Yield of green mass and straw on sod-podzolic porous loamy sand soil laying by porous sands at inorganic system of fertilizer application with optimum dosage under cereals-leguminosae mixed grasses has made 377 and 91,7 c/ha (N40P60K160), and for cereal grasses - 441 and 98,1 c/ha (N120P25K140). Organo - mineral system of fertilizer with application of 30 t/ha PMC (peatmanure compost) + N40Р30К160 on leguminosae-cereal and 30 t/ha PMC + N90P25K140 on cereals mixed grasses provides productivity of green weight at a level of 399-424 c/ha, hay - 101-104 c/ha. Mineral and organo - mineral systems of fertilizer provide reception of forages with the raised content of protein (8,0-12,0 % - cereals mixed grasses, 11,1-18,0 % - leguminosae - cereal), corresponding to 1-2 class of quality with favorable parity of potassium to calcium and magnesium, and as a whole adequating to zootechnical demands. Systems of fertilizer applied on porous loamy sand soils at cultivation of perennial cereals and leguminosae - cereal mixed grasses promote accumulation of dry matter of root and afterharvest rests (44-54 c/ha – at mineral system of fertilizer and 64-65 c/ha - at organo - mineral) which are used by the subsequent rotation crops after mineralization. As a whole for two years of using of perennial leguminosae-cereal herbage the increase dozes of phosphorous and potash fertilizers on the average has made from 48 up to 53 c/ha, nitrogen fertilizers - 49-74 c/ha and organic - 49 c/ha. The recoupment of 1 kg of mineral fertilizers by green mass considerably concedes to recoupment of cereal grasses. It speaks by high efficiency of leguminosae - cereal mixed grasses in the control. It is in 1,83 times more than at cereal grasses productivity.
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