Effects of nitrogen concentrations on the growth and yield of lowland cauliflower (Brassica oleracea. L. botrytis) grown in soilless media
2000
Mohd Khanif Yusof | Mohd Razi Ismail | Shaharuddin Mohd | Asiah Ahmad | Marziah Mahmood
The effect of three nitrogen (N) concentrations (3.57, 7.14 or 14,28 mM) on cauliflower (Brassica oleracea var. botrytis) growth and yield were evaluated on coconut coir dust (CD) and palm oil empty fruit bunch (EFB) grown in the greenhouse. There was no significant media (CO,EFB) X N concentration interactions for either plant growth parameters and total N concentration in the leaves at 21 days after planting (DAP). The growth of cauliflower was higher in CD than that in EFB. Plants grown in EFB were severely damaged due to fungal and mushroom growth in the media. Increasing N increased the total leaf area, leaf and stem dry matter of plants grown in CD. Curd diameter and dry weight were highest at highest N. Total N concentration in the leaf and stem increased with increasing N. However, total N concentration in both leaf and stem was decreased at the later growth stage, for all treatments indicating a mobilization of N in the plant. Although, nitrate concentration in the curd was lowest at lowest N and highest at high N, the concentration was under permissible levels in Europe with reference to broccoli (Brassica oleracea L. italica).
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