Monday, November 13, 2006 - 3:15 PM

Nutrient Uptake Patterns in Irrigated Chiles (Capsicum annuum L.).

Roberto Soto-Ortiz1, Vijay Reddy2, and Abraham Galadima1. (1) University of Arizona, SWES Dept., 429 Shantz Bldg., Bldg. #38, SWES Dept., Tucson, AZ 85721-0038, (2) Western Agricultural Labs., PO Box 64666, Lubbock, AZ 79464

Information regarding optimum fertilization and nutrient management for irrigated chiles in the desert Southwest of the U.S.A. is very limited. There is very little information available concerning nutrient requirements for chiles in terms of uptake patterns, distribution within the plant, and heat units after planting date (HUAP) relationships. In this study nine field experiments involving 18 chile varieties were conducted from 2003 through 2005 at four locations in AZ and one location in NM. Nutrients uptake (N, P, K, Mg, Ca, S, B, Zn, Mn, Fe, and Cu) was determined at four distinct stages of development (crown development, early bloom, peak bloom, and physiological maturity). Data were analyzed statistically as a repeated measures design and nutrient uptake models were developed for each plant nutrient among all experimental sites. Preliminary data show that overall, nutrient uptake patterns of chiles developed with a high degree of consistency as function of HUAP among all varieties and all sites.