MONOPOTASSIUM PHOSPHATE AS AN IN-SEASON FERTIGATION OPTION FOR POTATO

摘要: Monopotassium phosphate (MKP) is a potential option for fertigating phosphorus (P) in potato (Solanum tuberosum L.) when petioles are low P and high nitrogen (N); which situation where using ammonium polyphosphate (APP) could potentially result excessive N application. Fertilizer trials were conducted 2004–2006 with 0 or 56 kg P2O5 ha−1 fertigated as either APP MKP supplement to the pre-plant (112 224 ha−1) broadcast applied all plots. Supplemental fertigation increased petiole concentration, US No. 1 yield, total yield over control not receiving any in-season fertilizer regardless of source. In addition, tuber specific gravity. These results support previous studies showing that can be used increase yields concentrations viable substitute necessary.