[Yield and quality of forage grasses at various lead levels pollution of peat-bog soils]
2007
Golovatyj, S.E. | Lukashenko, N.K., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
In vegetative experience the increase in concentration of lead in peat soil with 3,8 up to 100 mg/kg was accompanied by decrease in productivity of timothy (Phleum Pratense), meadow fescue (Festuca Pratensis) and clover meadow (Trifolium Pratense). According to calculation values the authentic decrease in productivity of Trifolium Pratense in vegetative experience occurs at a level of lead content in soil 67 mg/kg, Festuca Pratensis at a level of pollution 84 mg/kg, Phleum Pratense - 88 mg/kg. In microfield experience statistically significant decrease in productivity of grass mixture Bromus Inermis + Trifolium Pratense is observed in the first hay crop at the lead content in soil 61 mg/kg, and in the second crop - at 50 mg/kg. Trifolium Pratense and Festuca Pratensis accumulated lead accordingly in 1,8 and 1,3 times more, than Bromus Inermis and Phleum Pratense. Accumulation of lead by mixed grasses Phleum Pratense + Trifolium Pratense and Bromus Inermis + Phleum Pratense is less than at use of one-specific crop of Trifolium Pratense on 13,2-22,5% and on 1,6-9,6% than Bromus Inermis. Soil pollution by lead leads to infringement of the major physiological processes in plants. At pollution of peat soil by lead over 42 mg/kg the decrease in content of general nitrogen, potassium and sums of irreplaceable amino acids in perennial grasses is observed
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