Asmahan Akhmad, Suntoro Wongso Atmojo, Saeri Sagiman, Widyatmani Sih Dewi
Abstract: Land new openings is the opening of secondary forest land by way of reclaiming the land and the land has not been planted with anything. Therefore, this area contained in the swamp tidal acid sulfate, then this land belong to the marginal land or problematic. Increasing the productivity of acid sulphate soils new openings required ameliorant (dolomite liming and fertilization NPK). This study objectives to determine the uptake of each variety and find varieties that have the best nutrient uptake, by giving ameliorant (dolomite liming and fertilization NPK) on a tidal swamp land acid sulphate new openings. Research conducted at the Plastics in Areal Tanjungpura Pontianak Faculty of Agriculture and the land taken from the Village of Teluk Pakedai, District of Kubu Raya. The method used is Factorial Experiments with Random Block Design (RBD). Using two factors, namely 6 Varieties and 3 calcification of dolomite-NPK fertilizer, with 4 replications, so that there are 72 populations. The variables of this study are the nutrient uptake of N, P, K, Ca, Mg, Fe and S on the roots and the top of the plant (stems and leaves) rice plants. The results showed that among the varieties there are variations in nutrient uptake and Varieties Ringkak Janggut (locally) with calcification of dolomite 2 tons of fertilizer NPK 90 Kg/hectare indicate nutrient uptake the roots of rice plants best and Variety Situ Bagendit (hybrid) with calcification 1 ton-pertilizer NPK 60 Kg/hectare shows the top nutrient uptake of plants (stalks and leaves) best.
Keywords: ameliorant, tidal wetlands, new openings acid sulfate soil, nutrient uptake, the rice plant