Phosphorus recovered from swine wastewater as a fertilizer for cotton grown with conservation tillage.
作者： M. B. Vanotti , A. A. Szogi , P. J. Bauer , J. M. Novak
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摘要: Current technologies for recycling P from animal waste through precipitation result in non-conventional fertilizer products. The objective of this research was to evaluate the use surface broadcasting recovered calcium phosphate as a source cotton (Gossypium hirsutum L.) when grown after winter rye (Secale cereale biomass crop using conservation tillage. Treatments two-year field study were material [no fertilizer, with particle size 0.5 – 1.0 mm, 2.0 4.0 and diammonium (DAP)]. Fertilizer application rate 168 kg P2O5 ha-1. Plant available (Mehlich 1) soil water 10 cm measured monthly. Crop uptake seed determined. ranking among treatments both years plant mm particles > = DAP control. For P, consistently higher than control, but two sizes similar No differences occurred growth or control either year. increased early season second year study, not first. did differ yield. When used should be applied small particles.
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