Responses of Red Rice Paddy under Low Nutrient Supply in Type B Tidal Swamp

Low soil fertility can constrain the paddy red rice yield. One
of the efforts to increase paddy red rice production at the Tidal
swamp area is using iron toxicity tolerant varieties. The
objectives of this research were (i) to evaluate the agronomic
responses of red paddy rice to low nutrient supply to
determine the sensitive character and (ii) to identify the
tolerant and nutrient-efficient variety under low nutrient
supply in a tidal swamp area. The experiment was conducted
at Tidal Swamp Area Type B, Telang Sari Village, Banyuasin
District, South Sumatra Province. The experimental design
was Split Plot with five replications. Nutrient supply was the
main plot, and the Varieties (Inpara 7; Inpago 7, Aek
Sibundong, and Telang Sari) were the subplot. The nutrient
supply treatments were H1: standard fertilizer rate and H2:
low nutrient supply, which is 30% of the standard rate. The
results showed that Inpago 7 and Inpara 7 were potential
varieties at low nutrient supply. The sensitive characteristics
of the varieties evaluated were chlorophyll content, number
of tillers, grain weight, and percentage of empty grain for
growth and production characters.