EFFECT OF PLANTING DATE AND VARIETY ON GROWTH AND YIELD OF BROCCOLI DURING THE DRY SEASON IN SOUTHERN THAILAND
The effects of planting dates and varieties on broccoli (Brassica oleracea L. var. italica Plenck) growth and yield were studied at Prince of Songkla University, Hat Yai, Songkhla province, southern Thailand. The trial was aimed to select the suitable planting dates and broccoli varieties for commercial production during the dry season. Split-plot in randomized complete block design was used in this experiment with four replications. From January to June, the Top Green, Green Queen and Yok Kheo had seedling survival rates of 76.53-100.00% except the Special. The Yok Kheo had the highest total yield of 12.31 and10.65 t.ha-1 when the planting in January and March, respectively. The Yok Kheo is an interesting new hybrid variety which producing the yield higher than the Top Green which is popular variety grown in southern Thailand. The yield of the Green Queen was not significantly different from the Top Green. It can be harvested at 11.67 and 9.38 days earlier than the Top Green and Yok Kheo, respectively.