Nitrogen Rates and Nitrapyrin Influence on Yields of Brussels Sprouts, Cabbage, Cauliflower, and Celery

Abstract

Abstract In field experiments using brussels sprouts ( Brassica oleracea L., Gemmifera Group), cabbage ( Brassica oleracea L., Capitata Group), cauliflower ( Brassica oleracea L., Botrytis Group), and celery ( Apium graveolens var. dulce L.), the application of nitrapyrin with ammonium sulfate fertilizer at planting produced higher yields than ammonium sulfate alone, at planting, or in split applications. Tissue levels of NO 3 -N of cabbage, cauliflower, and celery were usually significantly higher in nitrapyrin-treated plots than in those receiving comparable rates of Ν without nitrapyrin. Tissue levels of NO 3 -N in brussels sprouts did not increase significantly as Ν rate and yields increased.