Fall and Spring Phosphorus Fertilization of Potato Using a Dicarboxylic Acid Polymer (AVAIL
作者： Jeffrey C. Stark , Bryan G. Hopkins
DOI: 10.1080/01904167.2014.983124
关键词: Ammonium polyphosphate 、 Chemistry 、 Fertilizer 、 Phosphate 、 Lime 、 Phosphorus 、 Agronomy 、 Crop 、 Soil water 、 Soil test
摘要: A dicarboxylic acid polymer (AVAIL) modifies the soil immediately around fertilizer—potentially improving crop phosphorus (P) uptake efficiency and yield. Study objectives were to evaluate potato (Solanum tuberosum L.) response seasonal applications of liquid dry AVAIL blended P fertilizer on calcareous soils with low moderate test P. Field experiments conducted 2005–2008 included comparisons monoammonium phosphate (MAP; 11-52-0) broadcast and/or ammonium polyphosphate (APP; 10-34-0) band or without in various fall spring applications. increased US No. 1 yields for selected rate/source/timing combinations each four years; United States overall 2006 2008; total yield large (>284g) tubers 2006. The greatest responses occurred high lime concentrations. No advantage was observed any case.
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