Yield and chemical composition of Brussels sprout (Brassica oleracea L. gemmifera) as affected by boron management

Abstract

Boron (B) deficiency is widespread in the Anatolia region of Turkey. This could impact production and quality of Brussels sprout (Brassica oleracea L. gemmifera). A 2-year field experiment was conducted to study yield and quality response of four cultivars (Star, Brilliant, Oliver, and Maximus) to B addition (0, 1, 3, and 9 kg·ha-1 B). The optimum economic B rate (OEBR) ranged from 5.5 to 6.3 kg·ha-1 B resulting in soil B levels of 0.94 to 1.13 mg·kg-1. Independent of cultivar, B application decreased tissue nitrogen, calcium, and magnesium but increased tissue phosphorus, potassium, iron, manganese, zinc, and copper content. We conclude a B addition of 6 kg·ha-1 is sufficient to elevate soil B levels to nondeflcient levels. Similar studies with different soils and initial soil test B levels are needed to conclude if these critical soil test values and OEBR can be applied across the region.