RESPONSE OF SEVEN CROPS AND TWO SOILS TO APPLICATION OF BEEF CATTLE FEEDYARD EFFLUENT

摘要: A greenhouse experiment was conducted to evaluate yield and nutrient uptake following land application of beef cattle feedyard effluent. Effluent from a large commercial applied seven crops planted in 210 pots containing Pullman clay loam (PCL) or Amarillo fine sandy (AFSL). The evaluated were forage sorghum, wheat, corn silage, alfalfa, bromegrass, bermudagrass, Jose tall wheatgrass. Each crop soil type received five effluent application treatments representing 0%, 25%, 50%, 100%, 200% the annual nitrogen requirement about 20%, 40%, 80%, 160% phosphorus over growing period, which ranged 4 12 months. Dry matter increased with increasing rates for all except alfalfa AFSL, minimal differences in dry matter PCL. For PCL, silage had foliage crude protein concentrations equal to or greater than published values. protein concentrations less typical. In PCL at highest rate, wheat (16 kg/ha), (36 bromegrass (41 wheatgrass (37 sorghum (47 silage (57 bermudagrass (112 kg/ha). AFSL foliage were wheat (10 (12 (17 (20 kg/ha), corn (22 Soil characteristics including electrical conductivity sodium were generally higher after both types, although changes more pronounced AFSL than