Determination of Harvesting Time of Three Peanut Varieties Based on Heat Unit Accumulation

Abstract

The aim of this study was to evaluate the development of pod stage In various harvesting time and to determine total dally heat unit of three peanut varieties in the best harvesting time. The experiment was conducted at IPB research station Leuwikopo-Dramaga, Bogor from February until June 2013. Each varieties were harvested at 85, 90, 95, 100, 105, 110 DAP. The results showed that Kelinci reached 50% of the population to flower at 376.85 °Cd with base temperature 13°C, while Gajah and Jerapah reached at 391.80 °Cd. The best harvest time was determined by the highest percentage of full pod stage 2 and pod dry weight/plant. Peanut cv Gajah was harvested best at 90-100 DAP, cv Jerapah at 90 DAP and cv Kelinci at 105 DAP. Total dally heat unit accumulaled at 90, 100, 105 and 110 DAP were 1346.35, 1489.50. 1562.25 oCd, respectively.