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All Journal Journal of Tropical Soils SAINS TANAH - Journal of Soil Science and Agroclimatology
Sri Hartati
Department of Soil Science, Faculty of Agriculture, Sebelas Maret University
Agriculture, Biological Sciences & Forestry Education Environmental Science

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The Potential of Potassium Fertilizers in Improving the Availability and Uptake of Potassium in Rice Grown on Entisol Sri Hartati; . Suryono; Lia Sari Purnama
JOURNAL OF TROPICAL SOILS Vol 24, No 2: May 2019
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2019.v24i2.83-91

Abstract

Entisol is a marginal soil spreading over some areas in Indonesia. It has loose soil consistency, low aggregation rates, sensitive to erosion, and low nutrient content. Entisol has high K deficiency.  Potassium plays an important role in rice growth (Oryza sativa). The aim of the research was to study the effects of  type and dose of potassium fertilizers on available K in Entisol and its uptake by rice plants. The study was arranged in a Randomized Complete Block Design with 2 factors, i.e. the types of potassium fertilizers (KCl, ZK and KNO3) and doses of potassium fertilizers (0 kg K2O ha-1, 50 kg K2O ha-1, 100 kg K2O ha-1, and 150 kg K2O ha-1), with three replications. The results showed that the type of potassium fertilizers applied resulted in similar effects on almost all soil and plant parameters. The dose of potassium fertilizers significantly affected all  soil and plant parameters, the higher the doses, the higher the values of the parameters observed.
Studying the Residual Effect of Zeolite and Manure on Alfisols Cation Exchange Capacity and Green Bean Yield Ahmad Yazid Fudlel; Slamet Minardi; Sri Hartati; Jauhari Syamsiyah
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 16, No 2 (2019): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (956.399 KB) | DOI: 10.20961/stjssa.v16i2.30190

Abstract

Nowadays the innovations in organic agriculture systems continue to be developed to achieve a sustainable agriculture system. In Indonesia with high rainfall, nutrient loss is still a major problem. The application of zeolite and manure as a soil amendment is expected to increase nutrients available in soil and cation exchange capacity of the soil in the long term. The results on the first planting season showed a significant increase in chemical soil fertility. The objective of this study is to research the effect of residue zeolite and manure on soil chemical fertility and yields of the second planting season. This study used a complete randomized block design. The factors were a dose of zeolite (Z1: 2.5 tons ha -1; Z2: 5 tons ha-1) and kind of manure (P1: quail manure; P2: cow manure), with three replications. The result showed that zeolite treatment of 5 tons ha-1 and cow manure increased the total N soil by 27.78% and 45.4% compared to the control. The treatment of quail manure increased soil organic matter 78.78% compared to the control. The treatment of cow manure increased the green bean yield 28.76% compared to the control.
Application of litters to inhibit nitrification in Vertisols on sweet corn (Zea mays S.) Supriyadi Supriyadi; Adiprasetya Widyatama; Gadis Mona Prinandhika; Purwanto Purwanto; Sri Hartati
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 18, No 1 (2021): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v18i1.43631

Abstract

Nitrification, or the process of oxidation of ammonium to nitrate in the soil, needs to be inhibited because it reduces the efficiency of nitrogen fertilizers. Vertisols have 2:1 minerals and have high negative charge, so ammonium is more absorbed by soil particles, whereas nitrate is free to move in the soil and diffuses into the plant tissue or is leached with gravity water. This study aimed to determine the litter treatment that can inhibit the nitrification process in Vertisols on sweet corn plants. This research was conducted in June until November 2019 in the Plastic House of Plesungan, Gondangrejo, Karanganyar, Indonesia. This study used a basic completely randomized design with a single factor (litter type) as an immobilizer. The types of litter used in this study were Gliricidia maculata, Albizia falcataria, Senna siamea, and Tithonia diversifolia. The parameters observed were ammonium content, nitrification potential, average nitrate content, actual nitrification, plant height, number of leaves, and dry crown plant. Tithonia diversifolia gave the highest actual nitrification of 23.26%. Senna siamea has the lowest actual nitrification of 12.36%, followed by Gliricidia maculata with 17.39% and Albizia falcataria with 17.67%. This shows that the Tithonia diversifolia litter has the highest value in inhibiting nitrification. Maize plants treated with the Tithonia diversifolia litter had the best plant growth compared to those applied with other treatments. Therefore, among the treatments used, the Tithonia diversifolia litter was most optimal in inhibiting nitrification in Vertisols.
Co-Authors . Suryono Adiprasetya Widyatama Ahmad Yazid Fudlel Gadis Mona Prinandhika Jauhari Syamsiyah Lia Sari Purnama Purwanto Purwanto Slamet Minardi Supriyadi Supriyadi