critical stage, nutritional status, potassium and phosphorus rate, winter triticale
Abstract
Research was carried out in the years 2008-2010 on the objects of stationary experiment established in 2000 at the Research Station Brody - Poznań University of Life Sciences. Hortenso variety of winter triticale was cultivated in the conditions of one-factor experiment. The factor investigated was a differential level of mineral fertilization with phosphorus and potassium. The aims of the study comprised: (1) determination of winter triticale response with reference to the optimal fertilizer rate as well as reduced levels of P and K fertilization, (2) evaluation of winter triticale nutritional status at the stage BBCH 31 in the conditions of differential fertilization with phosphorus and potassium, (3) assessment of yield diagnostic methods based on nutritional status and biomass produced during the analyzed development stages. Triticale response in the experimental conditions indicated that this plant is more sensitive to potassium deficiency when compared with phosphorus. Evaluation of plant nutritional status with the use of PIPPA software indicated that plant yield was constrained by deficiency of numerous elements. In the group of mineral nutrients limiting triticale yield, the effects of calcium, magnesium and potassium were most evident.
