POTASSIUM BALANCE IN CONDITIONS OF VARIED FERTILIZATION OF IRRIGATED OR NOT IRRIGATED PERMANENT MEADOW

摘要: The long-term study was conducted on experimental objects, located the black degraded soil under varied fertilization and moisture conditions. aim of to assess impact divere permanent meadow potassium balance. field consisted four objects with mineral applied in amounts: 60, 120, 180 240 kg N·ha, two natural-mineral fertilization: G1-180 G2-240 N·ha liquid manure that covered needs potassium. nitrogen phosphorus were supplemented given dose. In autumn years 2008 2011 samples from layers 0-10 10-20 cm taken order determine abundance Three-cut utilization carried out. yielding content herbage evaluated calculate its Potassium balance all examined regardless level negative. However, after three a significant increase both shown. Effect irrigation dependent fertilization. On object N-60 resulted marked reduction soil. other N-120, N-180, N-240, G1 G2