[Fertilizer influence on the productivity of cereal - grass crop rotation and fertility of sod - podzolic light loamy soil]
2008
Lapa, V.A. | Lomonos, M.M., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry | Bosak, V.N., Polesje State Univ., Brest (Belarus) | Bliznyuk, N.A., Belarus State Agrarian Technical Univ., Minsk (Belarus)
The application of complete organic and mineral fertilizer (N36P60K130 on the background of 8 t/ha manure) has provided a cereal-grass crop rotation productivity up to 9.31 c/ha f. u. when the content of humus, phosphorus and potassium in the plough horizon on sod - podzol light loam soil is increased. The removal of nitrogen, phosphorus or potassium reduced the crop rotation productivity when the content of mobile phosphorus and potassium compounds in soils was decreased. It was concluded that mid-annual application of nitrogen fertilizers N18 - 54 on the background on the without litter cattle manure has provided efficiency of grain - grass crop rotation up to 82,9 - 86,7 c/ha f.u. however caused decrease of content of mobile phosphorus on 7 - 17 mg/kg, potassium on 40 - 52 mg/kg at intensity of balance of phosporus 51-57%, potassium - 51-53%. Mid - annual application of N18-54P30K65 has increased efficiency of grain - grass crop rotation up to 87,3 - 90,5 c/ha f.u. at decrease of content of mobile potassium during five field crop rotation on 13 - 29 mg/kg of soil and increase of the mobile phosphates content in arable horizon at intensity of potassium balance on 81-83 %, phosphorus 91 - 96%. Increase in mid - annual doses of phosphoric and potash fertilizers up to P6OK130 in combination with N18 - 54 has promoted increase of grain-grass crop rotation productivity up to 89,9 - 94,8 c/ha f.u. at increase of the mobile potassium and phosphorus content in soil (intensity of balance of phosphorus has made 127-133%, potassium 108-112%)
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