Respons Tanaman Padi pada Populasi Tinggi di Lahan Sawah Irigasi

Abstract

Plant density is one of important technology in accordance with increasing rice productivity. Its in line with higher plant population up to optimum value, however increasing density above the optimum value will resulting decreasing yield. The optimum plant population density depends on many factors such as environment, management practices and specific varieties. This study aimed to obtain response of high population density on growth and yield in some rice varieties. The study was designed using split plot design with three replications. The main plot was plant population density, i.e. 213.333 plant population per ha (jajar legowo 2:1 planting method); 376.470 plant population per ha (jajar legowo ganda 1 planting method); 571.428 plant population per ha (jajar legowo ganda 2 planting method). Subplot was varieties i.e: Mekongga, Inpari-30 Ciherang Sub-1, and Inpari-32 HDB. The results showed that a high population density through jajar legowo ganda 2 planting method could increase the yield of Mekongga 16.31% and Inpari32 HDB 20.17% compared to jajar legowo 2:1 planting method, while Inpari-30 Ciherang Sub-1 had no significantly different between those two planting method. Therefore, the optimum irrigated rice yield could reach with plant density arragement and specific variety.