Nutrient uptake of corn plant as affected by addition of rock dust that have been treated by heating and humic materials a) Agrotechnology Department, Pelalawan School of Technology (STT Pelalawan), Jl. Lintas Timur Km. 28, Desa Simpang Beringin, Kecamatan Bandar Seikijang, Kabupaten Pelalawan-Riau, 28383) Abstract Silicate rocks are natural substance that contains many essential nutrients for plants, but the applications of silicate rocks dust as fertilizer in agriculture are very limited. It is because the nutrients derived from silicate rock dust were very slowly available, as result, the effect on plant growth is not significant. The effort that can be used to accelerate the availability of nutrients from rocks dust fertilizer is through heating treatment and giving humic materials. This research was conducted using a split-plot designed by three factors, namely the first factor is heating (temperature 250C, 3000C, and 7000C) as the main plot, the second factor is a type of rocks (trachyte, diorite, and basalt) and the third factor is the solvent (KOH 0,1N, rainwater, lignite humic and peat humic) as the subplot. The results showed that the rock dust fertilizer that was treated with peat humic gave a significant influence on the plant height 14 days after planting (DAP). Besides, the application of basalt rock dust fertilizer can give a significant influence on corn plants^ height at the age of 21, 28, and 35 DAP. The highest dry weight of corn plants was obtained in the treatment of basalt rock dust that was treated by heating to a temperature of 7000C with the solvent peat humic. Nutrient uptake of K in corn plants tends to be higher in treatment within the rock dust that was treated by heating to a temperature of 3000C and lignite humic solvent. Keywords: corn, humic, natural fertilizer,rock dust Topic: Crop Production and Environment |
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