Improving Phosphorus Use Efficiency Through Organically Bonded Phosphorus

摘要: Improving Phosphorus Use Efficiency Through Organically Bonded Micheal Warner Hill Department of Plant and Wildlife Sciences, BYU Master Science Current maximum efficiency phosphorus (P) fertilizers that is utilized by plants in the same year application ranges from near zero to thirty percent. Despite low utilization P crop production, yields are often limited deficiencies. Innovative technology requisite achieve greater as fertilizer demands increasing, while mineral resources rapidly being depleted. A growing environmental concern for nutrient pollution surface waters also carries significant weight. novel new product, Carbond P, promising increase use efficiency. Research needed understand its capabilities functioning mechanisms imbedded within technology. Several research studies were conducted evaluate (CBP) against traditional ammonium polyphosphate (APP) monoammonium phosphate (MAP). soil column leaching study was determine mobility through three soils, at two rates (20 30 kg ha) either a banded or mixed application. Mobility evaluated 24, 48, 110 365 d after fertilization. CBP showed significantly total leachate values across all types averaged readings taken until daf both types. In applications, generally produced solubility than MAP APP up daf. For applications with soil, had 24 days application, but later evaluation dates (48 daf) higher APP. No statistical significance found applications. One glasshouse on maize (Zea mays L.) grown soils 0, 5, 10, 20, 40, 80, 160 ha comparing impacts early season growth. more biomass when (and 20 rate third soil), increased petiole one thicker stems another. Two field trials similar physiological advantages over growth stages. responded uptake V12-V18 stages field, well plant height At R2-R3 stages, stalks fields These enhancements strongest medium highly calcareous (6-12 %) (7 mg kg). observations warrant further investigation benefits limitations.