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The Potential Of Nickel Slag with Humic Substance Addition as Ameliorating Materials on Gajrug Red-Yellow Podzolic Rosalina, Febrianti; Tjahyandari, Dyah; Darmawan, Darmawan
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 1 (2018): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15608/stjssa.v15i1.17814

Abstract

Nickel slag and humic substance have a strong potential for use as soil ameliorants in land remediation, owing to their chemical properties that can improve acidic soils. This study aimed to determine their effect on red-yellow podzolic soil. This greenhouse incubation study used a 2-factorial completely randomized design. Factor 1 was nickel slag at 4levels (0, 8, 12, and 16 ton ha-1), while Factor 2 was humic substance at 3 levels (0, 15, and 30 litre ha-1), with 3 replications. Statistical analysis of the data used analysis of variance, and whenever a significant difference was detected, further verification was tested using Duncan’s Multiple Range Test at a level of significance (α) of 5%. The results showed that the application of nickel slag and humic substance can increase the values of pH, total-N, available-P, and exchangeable-Mg of the red-yellow podzolicsoil, but also decreasesexchangeable-H. The interactive effects of nickel slag and humic substancecan raise soil K-exchangeable only. The levels of heavy metals (Pb, Cd and As) in the soil after the application of nickel slag and humic substance remain within normal limits that is, they are environmentally safe for use as a soil ameliorant
The Effect of Composting Azolla Compost Fertilizer and Humic Material on CO2 Gas Production in Sand Land Rosalina, Febrianti; Kahar, Muhammad Syahrul
Bioscience Vol 2, No 2 (2018): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/0201822100974-0-00

Abstract

his study was an experimental study which aimed to determine the effect of Compost Azolla Fertilizer (KA) and the addition of humic material (H) on the sand soil to the levels of CO2 produced in the respiration process of soil microorganisms (incubation soil conditions). The design used is a Completely Randomized Design (CRD) consisting of 9 treatments, namely 300 kg ha-1 urea (U), 4 tons ha-1 KA (T1), 15 liters ha-1 H (T2), 2 tons ha-1 KA + 15 liters ha-1 H (T3), 4 tons ha-1 KA + 15 liters ha-1 H (T4), 6 tons ha-1 KA + 15 liters ha-1 H (T5), 2 tons ha-1 KA + 30 liters ha-1 H (T6), 4 tons ha-1 KA + 30 liters ha-1 H (T7), 6 tons ha-1 KA + 30 liters ha-1 H (T8) and 1 control (K ) without the addition of train and H with 3 replications. Measurement of carbon dioxide (CO2) levels from each sample using gas chromatography equipped with TCD (Thermal Conductivity Detector). The statistical data analysis used was the F test, whereas to see the difference in the effect of each treatment, the BNT test was used. The results showed that Azolla compost fertilizer and humic material on sand soil had an effect on the level of CO2 gas production produced in the soil microorganisms respiration process, where the concentration of Azolla compost fertilizer and humic material which most affected the increase of CO2 gas production in sand soil was treated with the highest concentration of 6 tons ha-1 Azolla + 30 liter compost fertilizer ha-1 H (T8).