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All Journal Jurnal Ilmu Pertanian Indonesia JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management Jurnal Solum Caraka Tani: Journal of Sustainable Agriculture JURNAL AGROHITA

Mimien Harianti

Agriculture Faculty, Andalas University, Unand Campus, Limau Manis, Padang 25163

Author-ID : 2853994

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Industrial & Manufacturing Engineering Other

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Articles

Aktivitas β-Glukosidase pada Beberapa Kelas Penggunaan Lahan Gambut Tropis di Pesisir Selatan, Sumatera Barat nurul hijri; Mimien Harianti; Zuldadan Naspendra; Teguh Budi Prasetyo
Jurnal Solum Vol 19, No 1 (2022)
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Most of the peatlands in Pesisir Selatan, West Sumatra have been converted into agricultural activities. Due to drainage, the peat decomposition process becomes faster. The activity of β-glucosidase is one of the enzymes that can be used as an indicator of the decomposition of organic matter and produces greenhouse gas emissions, likes CO2. Therefore, this study was conducted to identify the activity of β-glucosidase in several land uses in Pesisir Selatan peatlands. Observations were performed in several land-use types consisting of agricultural land (LP), bare land (LT), shrubs (SB), smallholder oil palm plantations (PSr), private company oil palm plantations (PSs), and forests (H). The activity of β-glucosidase was analyzed by using salicin and Na-acetate methods. The results of this study showed that the highest β-glucosidase activity was found in agricultural land use (LP). Based on the land use types, the activity of β-glucosidase follows agricultural land (LP) 3.42 μg.g-1.jam-1 > bare land (LT) 2.26 μg.g-1.jam-1 > shrubs (SB) 1.63 μg.g-1.jam-1 > smallholder oil palm plantations (PSR) 1.31 μg.g-1.jam-1 > private company oil palm plantations (PSs) 1.28 μg.g-1.jam-1 > forest (H) 0.80 μg.g-1.jam-1. Soil characteristic that significantly affects enzyme activity is water content where the higher the water content, the lower the β-glucosidase activity, and vice versa. Based on this study can be concluded that the change in land use from natural land to agricultural land triggers an increase in the activity of enzymes in decomposed peat materials.Key words: β-glucosidase, enzyme, palm plantation, land-use, peatland

SIFAT FISIKOKIMIA LAHAN PERTANIAN MONOKULTUR PADA BEBERAPA KELAS LERENG DI DAERAH UTARA KAKI GUNUNG TALANG Junaidi Junaidi; Mimien Harianti; Oktanis Emalinda; Herviyanti Herviyanti; Azizah R
Jurnal Solum Vol 18, No 1 (2021)
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

The area at the foot of Mount Talang is one of the areas that excellent in agriculture, especially the cultivation of horticultural crops. In the northern area with steep slope conditions, the local community applies an intensive monoculture cropping system, this will accelerate land degradation in the long term. This study aims to examine the physicochemical properties of monoculture agricultural land in the northern foothills of Mount Talang on several slopes. This research was conducted with a survey method, soil sampling was carried out by means of purposive random sampling, on monoculture agricultural land on slopes > 45%, 25-45%, 15-25%, and 8-15% and forest as control, at a depth of 0 -20cm and 20-40cm. The results showed that the soil texture that dominates at the forest and monoculture agricultural land are dusty loam. Soil water content increases with increasing soil layer depth, soil water content in monocultures 25-45% (73.72%) is the highest. Soil volume weight ranging from 0.4-0.6 g / cm3 has the same tendency at both soil depths. The total pore space of forest land and monoculture agricultural land is a large average of 75% with high criteria. The highest soil organic C content was found in monoculture agricultural land with a slope of >45%. The pH value of H2O for all land uses was 5.15-5.29 and the pH for KCl was 4.5-5.2 for acid criteria. The cation exchange capacity was above 40 me/100g (very high criteria), the total N content was 0.8-1.6% with very high criteria, too. Based on the researchs data, the physicochemical properties of monoculture agricultural land on several slope classes matched the physiochemical conditions of the forest. The potential for land degradation is still minimal even though it is on the upper slopes of the foot of Mount Talang. However, monoculture farming while maintaining soil organic matter content must remain a priority for agricultural land management in this area.Key words: monoculture land, forest, slope, North area of foot Mount Talang

EFEK SISA JERAMI DAN TITONIA YANG DIKOMPOSKAN TERHADAP PRODUKSI PADI SAWAH Gusnidar Gusnidar; Syafrimen Yasin; Mimien Harianti; Tutik Oktaviana
Jurnal Solum Vol 15, No 2 (2018): JURNAL SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

The experiment to obtain residue compost of rice straw (S) and tithonia (T) for reduce commercial fertilizers (CF) input and that effect for rice production. This research was arranged in Completely Randomized Block Design (RBD) with three replications of six treatments. The residue treatments are; A (input Urea 200 kg ha-1 (Ru) + SP-36 100kgha-1 (Rp)+KCl 75 kgha-1 (Rk)), B (Ru+2Rp), C (S 5 tonsha-1+ R), D ( S 5 tonsha-1+Ru+Pstarter (Ps)), E (T, 2,.5 tonsha-1 + J, 2,.5 tonsha-1 + 75%Ru+Ps), F (T, 2,.5 tonsha-1 + J, 2,5tonsha-1 +50%Ru+Ps). Data of research were statistically analysed. If the F-calculated was significantly different, they would be further analysed using LSD 0.05. The results showed that residue of T, 2,5 tonha-1 could reduce CF by 50 kg Ureaha-1 (25% R), 75 kg KCl ha-1 (100% R) and 90 kg SP-36ha-1 (90% R) with production 6,66 tonsha-1 Husk Rice (HC). If it is based on farmer tradition, residue of T could reduce CF by 50 kg Ureaha-1 (25% R), and 190 kg SP-36 ha-1 0.95.Key words : compost, residue, rice, straw, tithonia

AKTIVITAS ENZIM FOSFATASE ASAM BASA PADA BEBERAPA POLA PERTANAMAN BAWANG MERAH PADA DUA KELERENGAN ALAHAN PANJANG Sri Dewi Murni; Agustian Agustian; Mimien Harianti
Jurnal AGROHITA: Jurnal Agroteknologi Fakultas Pertanian Universitas Muhammadiyah Tapanuli Selatan Vol 5, No 2 (2020): Jurnal Agrohita
Publisher : Fakultas Pertanian Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jap.v5i2.2261

Penelitian ini bertujuan untuk mengetahui aktivitas enzim fosfatase asam dan basa pada beberapa pola pertanaman bawang merah, bawang merah (monokultur), bawang merah + cabai (rotasi) dan bawang merah – bawang daun (tumpangsari). Penelitian ini dilaksanakan didaerah Alahan Panjang Sumatera Barat dari bulan Desember 2019 – Mei 2020. Sampel tanah diambil menggunakan metoda purposive random sampling pada dua kelerengan 0-8% dan 8-15% serta dua kedalaman 0-15 cm dan 15-30 cm. parameter yang dianalisis meliputi aktivitas enzim fosfatase, respirasi dan P-tersedia. Hasil penelitian menunjukkan aktivitas fosfatase asam lebih tinggi daripada aktivitas fosfatase basa, nilai fosfatase asam 0,059 - 0,065 dan fosfatase basa berkisar 0,059- 0,055. Respirasi tertinggi (62,58) terdapat pada bawang merah – bawang daun dengan kelerengan 0-8% dan terendah (49,13) pada bawang merah + cabai dengan kelerengan 0-15%. P-tersedia terendah (18,35 ppm) didapatkan pada tanaman bawang merah yang di tumpangsarikan dengan bawang daun

The Physical Property Changes of Peatland upon Conversion of Oil Palm Plantation to Corn Cropping in Kinali, West Pasaman, West Sumatera Mimien Harianti; Teguh Budi Prasetyo; Junaidi Junaidi; Gusmini Gusmini; Anggun Fitria Yenad
Jurnal Ilmu Pertanian Indonesia Vol. 27 No. 4 (2022): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.27.4.502

The decrease in oil palm production in Kinali, West Pasaman Regency, has become the factor that makes the farmers convert their peatlands to corn cropping. This study aimed to examine the physical characteristics (irreversible drying) of peatlands due to the conversion of oil palm to corn cropping. Some observations and samplings were conducted by applying a transect method, as it was perpendicular to the collection drain for 2, 200, and 400m from the main drains in three locations as the uses of the lands: (1) oil palm plantations, (2) <2-year corn cropping, (3) >2-year corn cropping. In each land, 3 sample points were taken with 2 repetitions at a depth of 0‒20 cm and 20‒40 cm. The physical properties of peatlands that have been converted from oil palm plantations to corn cropping include the water content increasing from 286.4 to 348.5 and 322.7%, the ash content decreasing from 55.2 to 43.5 and 47.5%, with C-organic increased by 25.9 to 30.7 and 32.4%, fiber content increased from 27.1 to 32.1 and 28.7%, and the volume weight of the peat tended to be similar (0.3 g/cm3). In all land use, irreversible drying occurred; in the oven at 50°C dan 70°C with a drying time of 3´24 hours, and at 150°C, and the drying time of 1´24 hours, the moisture content of 232‒256% in oil palm plantation, 269‒290% in <2-year corn cropping, and 394‒440% in >2-year corn cropping. Irreversible drying occureds more quickly on the peatlands in oil palm plantations rather than in corn cropping. Keywords: corn cropping, irreversible drying, palm oil plantation, peatland

Index of contamination/pollution factor, geo-accumulation and ecological risk in ex-gold mining soil contaminated with mercury Amsar Maulana; Mimien Harianti; Teguh Budi Prasetyo; Herviyanti Herviyanti
Journal of Degraded and Mining Lands Management Vol 10, No 4 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.104.4791

Mercury is a hazardous contaminant, and it is necessary to clean up Hg contamination on an ongoing basis. However, Hg contamination and ecological risks have not become a particular concern in the community. As a first step, this study evaluated the environmental risk assessment of Hg contamination/pollution in ex-gold mining soil. The results showed that the average total Hg in ex-gold mining soil was 4.11 and 4.25 mg kg-1 for depths 0-20 and 20-40 cm, respectively, greater than the threshold limit set nationally (0.3 mg kg-1) and internationally (0.05-1 mg kg-1). The index of contamination/pollution factor and geo-accumulation of Hg were 13.70 and 1.39 at a depth of 0-20 cm, and 14.16 and 1.47 at a depth of 20-40 cm. The prospective ecological risk index and risk quotient were 5.48E2 and 1.03E2 at a depth of 0-20 cm, and 5.66E2 and 1.06E2 at a depth of 20-40 cm. The contamination/ pollution factor and ecological risk index indicate high Hg contamination and pollution in the soil. Therefore, appropriate technology is needed for the remediation process of ex-gold mining soil that considers all elements to a user-friendly level, such as amelioration technology with heavy metal inactivation techniques.

DINAMIKA KARBON DAN AKTIVITAS β-GLUKOSIDASE DI TOPSOIL DAN SUBSOIL LAHAN PERTANIAN MONOKULTUR NAGARI ALAHAN PANJANG SUMATERA BARAT Sri Dewi Murni; Agustian Agustian; Mimien Harianti
Jurnal Tanah dan Sumberdaya Lahan Vol. 10 No. 2 (2023)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2023.010.2.22

This study aimed to determine the dynamics of carbon and glucosidase enzyme activity in the topsoil and subsoil of monoculture land. This research was in Nagari Alahan Panjang, West Sumatra. Soil samples were taken using a purposive random sampling method on three cropping patterns: monoculture, rotation and intercropping, and two depths of 0-15 cm and 15-30 cm. The parameters analyzed included total N, organic C, exchangeable K, Ca, Mg, and Na, glucosidase, biomass C, and respiration. Data from observations were analyzed with Pearson statistics 8 correlation. The results showed that β-glucosidase activity was positively correlated with total N and organic C, biomass C was positively correlated with exchangeable Mg, and respiration was positively correlated with N total and β-glucosidase.

ESTIMASI CADANGAN KARBON PADA TANAH BEKAS TAMBANG EMAS DI KABUPATEN DHARMASRAYA, SUMATERA BARAT Amsar Maulana; Mimien Harianti; Teguh Budi Prasetyo; Herviyanti Herviyanti
Jurnal Tanah dan Sumberdaya Lahan Vol. 10 No. 2 (2023)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2023.010.2.26

Climate change, deforestation, and substantial loss of agricultural land within gold mining concessions in Dharmasraya greatly affect soil carbon stocks (Cs). This study used a survey method with purposive random sampling based on variations in ex-gold mining areas in each region, at depths of 0-20 and 20-40 cm with three to five replicates with a total of 54 samples. The estimation of Cs in ex-gold mining soil was highest at a depth of 20-40 cm (5.89E2), compared to a depth of 0-20 cm (1.38E2), where bulk density (BD), soil organic carbon (SOC), and total Hg in ex-gold mining soil at a depth of 0-20 and 20-40 cm were 1.46 and 1.39 g cm-3; 0.03 and 0.05%; 4.11 and 4.25 mg kg-1, respectively. The Cs in ex-gold mining soil at a depth of 0-20 cm is very significant by BD (r=-0.522** or Cs=-628.03(BD)+1055.1; R²=0.275) and SOC (r=0.948** or Cs=4896.8(SOC)-6.4673; R²=0.8996) and total Hg (r=0.518** or Cs=81.373(Hg)-196.43; R²=0.2688). However, at a depth of 20-40 cm, it was very significant by SOC (r=0.836** or Cs=16666(SOC)-196.03; R²=0.699).

Biochar Quality During Slow Pyrolysis from Oil Palm Empty Fruit Bunches and Its Application as Soil Ameliorant Amsar Maulana; Mimien Harianti; Salma Athiyya; Teguh Budi Prasetyo; Moli Monikasari; Irwan Darfis; Dewi Rezki; Herviyanti Herviyanti
Caraka Tani: Journal of Sustainable Agriculture Vol 40, No 1 (2025): January
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v40i1.93859

The optimal utilization of oil palm empty fruit bunch (OPEFB) waste holds significant potential for biomass bioconversion via slow pyrolysis, presenting a promising alternative for producing high-quality biochar as a soil ameliorant. This study investigates the effects of slow pyrolysis temperatures (≤ 300 °C) on the physicochemical properties of biochar derived from OPEFB and evaluates its efficacy as a soil ameliorant. This study utilized a completely randomized design (CRD) with three replications across two experiments. The first experiment assessed the effect of slow pyrolysis temperature on the quality of biochar derived from OPEFB, with treatments set at four temperatures (150, 200, 250, and 300 °C) levels. The second experiment evaluated the impact of the selected biochar on the surface charge of oil palm plantation soil, applying biochar at five different doses (0, 20, 40, 60, and 80 tons ha-¹). The potential temperature of 200 °C in slow pyrolysis had a significant effect on the quality of biochar from OPEFB with a yield ratio of 27.84% char; proximate (91.95% volatile matter and 0.81% fixed carbon), cation exchange capacity (CEC) [167.73 cmol(+) kg-1], and macro and micronutrients (e.g., C, N, P, K, Ca, Si, Fe, Cu, Zn, and Mn). The potential of O-H, N-H, C-H, and C=O functional groups of biochar from OPEFB for nutrient availability and absorption efficiency proven by the effect of 40 tons ha-1 biochar from OPEFB which significantly increased 80% of soil surface charge [pH by 0.80; organic matter (OM) composition by 19.8%, CEC by 11 cmol(+) kg-1] and nutrients [0.93% C; 0.04% N; 17.57 ppm P2O5; 0.65 cmol(+) kg-1 K] on Inceptisols.

Co-Authors . Gusmini Agustian Agustian Amsar Maulana Amsar Maulana Amsar Maulana Anggun Fitria Yenad Azizah R Dewi Rezki Emalinda, Oktanis Gusnidar, G Herviyanti Herviyanti Herviyanti Herviyanti Hijri, Nurul Irwan Darfis Jamhari Jamhari Junaidi Junaidi Junaidi Junaidi Moli Monikasari Salma Athiyya Sri Dewi Murni Syafrimen Yasin Teguh Budi Prasetyo Teguh Budi Prasetyo Tutik Oktaviana Zuldadan Naspendra

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