Abstract
The literature has confirmed the efficacy of sulphur (S) when growing Brassicaceae. However, there are no studies with this nutrient on broccoli. Therefore, the aim of this study was to evaluate the response of broccoli (hybrid Avenger) to sulphur rates applied at top dressing in the presence or absence of organic compost at planting. The experimental design was a randomized complete block, with ten treatments (5 x 2 factorial design) and four repetitions. Treatments consisted of five S (ammonium sulphate) rates (0, 31, 62, 93 and 124 kg ha-1); with organic compost (100 t ha-1) in planting or without organic compost in planting. After harvesting, head fresh matter, head diameter and number of leaves were evaluated. In general, head diameter, head height and fresh matter increased in all treatments by adding organic compost. A quadratic effect was observed for head fresh matter and head height by applying organic compost (100 tha-1), as the maximum values were 620.6 g and 17.2cm at the rate of 66.9 and 49.2 kg S ha-1, respectively. Key words: Brassica oleracea var. italica, fertilization, sulphate.
Highlights
Broccoli (Brassica oleracea var. italica) belongs to the Brassicaceae family
Head diameter, head height and fresh matter increased in all treatments by adding organic compost
Given all that has been earlier mentioned, this current study aimed to evaluate the response of broccoli to S application at top dressing, in the presence or absence of organic compost at planting
Summary
Broccoli (Brassica oleracea var. italica) belongs to the Brassicaceae family. It is well known for its nutritional value, as it provides vitamins and fibre, preventing against some types of cancers and heart diseases; produced; and has already spread its popularity on global market (Keck, 2004; Baenas et al, 2016; Bachiega et al., 2016; Ciancaleoni et al, 2016). It is well known for its nutritional value, as it provides vitamins and fibre, preventing against some types of cancers and heart diseases; produced; and has already spread its popularity on global market (Keck, 2004; Baenas et al, 2016; Bachiega et al., 2016; Ciancaleoni et al, 2016). In Brazil, there are two types of broccoli cultivars, that is, “ramoso” and “singlehead” (Filgueira, 2008). “Ramoso” is characterized by a small main head; coarse-grained; a considered number of side shoots; multiple crops; and sold by the bunch (stems).
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