Abstract
Environmental condition is the main constrain of plant cultivation in riparian wetland. Transplanting time is frequently delayed due to flooding and the cultivated plants often experience drought stress during their generative stage due to insufficient water availability. The objective of this study was to evaluate the effect of delayed transplanting and drought stress on the growth and yield of cauliflower (Brassica oleracea Var. botrytis L.). The study was arranged based on the Factorial Randomized Block Design consisted of two factors, i.e., transplanting time and drought stress. The results showed that extended delay of transplanting for more than 25 days after sowing inhibited the plant growth, i.e., leaf number, canopy area, harvesting time, leaf weight, curd weight, curd volume, curd diameter, fresh and dry weight of roots, and root length. Halted water supply for 5 days during curd development resulted in a devastating drought stress since soil moisture dropped to 8%. The drought stress significantly increased the root length, but this increase was unable to avoid yield reduction. It is suggested that transplanting time of cauliflower at riparian wetland should be carried out prior to 25 days after sowing.
Highlights
Cauliflower (Brassica oleracea var. botrytis L.) which contains high fiber, potassium, carotene, and vitamin C is commonly consumed vegetable in Indonesia [1]
Transplanting time at 25 days after sowing (DAS) resulted the highest number of leaves continuously from 47 DAS until 75 DAS
There were not significantly different SPAD value of those transplanted in 25 DAS and 32 DAS, but reduction showed in plants transplanted at 39 DAS (Table 1)
Summary
Cauliflower (Brassica oleracea var. botrytis L.) which contains high fiber, potassium, carotene, and vitamin C is commonly consumed vegetable in Indonesia [1]. Botrytis L.) which contains high fiber, potassium, carotene, and vitamin C is commonly consumed vegetable in Indonesia [1]. In 2017, the production of cauliflower in Indonesia was 152.869 tons which 124 tons from South Sumatra. The production of cauliflower in South Sumatra increased by the time. The production area has decreased from 36 ha in 2017 to 27 ha in 2018 [2]. The cauliflower cultivation in South Sumatra is limited in the highlands area. The most suitable altitude for cauliflower cultivation was in range of 1000-3000 m above sea level [3]. Several varieties had been developed to be adaptive in lowlands
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