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Jurnal Solum
Published by Universitas Andalas
ISSN : 18297994     EISSN : 02560835     DOI : https://doi.org/10.2057/jsolum
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Focuses and scopes of Jurnal Solum is to publishes all aspects in the original research of soil science or review covering: Soil physic and soil conservation, Soil mineralogy, Soil chemistry and soil fertility, Soil biology and soil biochemical, Soil genesis and classification, Land survey and land evaluation, Land development and management environmental.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah
Articles 4 Documents
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Search results for , issue "Vol 19, No 1 (2022)" : 4 Documents clear
SOIL NUTRIENT LOSS THROUGH EROSION CAUSES ECONOMIC LOSS IN THE DELI WATERSHED UPSTREAM Nurmala Fitri; Aceng Hidayat; Ahyar Ismail
Jurnal Solum Vol 19, No 1 (2022)
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.78 KB) | DOI: 10.25077/jsolum.19.1.1-14.2022

Abstract

Soil erosion generally occurs in areas with steep slopes, especially in mountainous regions, such as the upstream of Deli Watershed located in the administrative area of Karo Regency and Deli Serdang Regency, North Sumatra Province, Indonesia. Apart from the biophysical form of the land, this area also tends to have a higher rainfall level than other lower sites. In addition, the condition of the land surface that lacks green vegetation, such as forests, may lead to erosion. The loss of soil particles, in turn, has the potential to eliminate soil nutrients that act as inputs for agricultural production. Therefore, this study aimed to calculate the average erosion upstream of the Deli watershed and estimate the value of the economic loss of soil nutrient loss due to erosion. The Universal Soil Loss Equation (USLE) Method and the Replacement Cost Method were used. The analysis results showed that the average erosion of the Deli Watershed upstream was 583.02 tonnes/ha/year, which is classified as very heavy erosion. At the same time, the economic loss value for replacing soil nutrients was Rp 2,072,636,100 per ha. Hence, it shows the application of Soil and Water Conservation (KTA) is needed to reduce economic losses due to environmental degradation.Key words : erosion, nutrient loss, replacement cost, USLE
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (140.332 KB) | DOI: 10.25077/jsolum.19.1.15-23.2022

Abstract

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
Rasio Fraksi Debu-Liat Sebagai Indikator Perkembangan dan Kesuburan Tanah Muhammad Nuriman; Rini Hazriani; Tri Tiana Ahmadi Putri
Jurnal Solum Vol 19, No 1 (2022)
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (222.255 KB) | DOI: 10.25077/jsolum.19.1.24-33.2022

Abstract

Soil horizon development is a determinant of soil type and characteristics. The morphology reflects the stages of soil formation by observing the genetic horizon. The genetic horizon is a soil layer distinguished by symbols (O, A, E, B, C, and R). Soil formation can also be obtained from the silt-clay fraction as part of the soil texture observation. The silt-clay ratio can reflect the soil morphology and genesis. This study aimed to determine the silt-clay ratio as an indicator of soil development and fertility. This study was conducted in 2020 in Manismata Sub-District West Kalimantan Province with soil parent material derived from sedimentary rocks with the topography of 0-3%, 3-8%, and 8-15%. The observations were carried out on five soil profiles in terms of morphology, texture, organic matter, nitrogen, CEC, and Ca. Based on the results, entisol (regosol) had A-C genetic horizon and silt-clay ratio >2.73. Meanwhile, inceptisol (kambisol) had an A-B-C genetic horizon and a silt-clay ratio of 1.44 – 2.24. The silt-clay ratio in entisol had a significant influence on organic matter, CEC, and Ca of 75.79%, 86.98%, and 85.14%, respectively. Silt-clay ratio in inceptisol had a significant influence on organic matter, CEC, and Nitrogen. 3-8% inceptisol had a negative relationship of 67.25%, 52.33% and 84.59%, respectively. Meanwhile, 8-15% of Kambisol had a positive relationship with R2 of 69.08%, 54.49%, and 66.61%, respectively. The difference in the relationship (negative, positive) on inceptisol was due to 3-8% inceptisols having lithologic discontinuities. Thus, it can be concluded that the silt-clay ratio can be an indicator of soil development and fertility.Key words : Fertility, Morphogenesis, Silt/Clay, Soil Weathering
PERANAN PUPUK CAIR ASAL INOKULAN Trichoderma sp PADA BUDIDAYA TANAMAN KENTANG MERAH SEMI ORGANIK Jamilah Jamilah; Pendra Fauzi; Aslan Sari Thesiwati
Jurnal Solum Vol 19, No 1 (2022)
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (113.718 KB) | DOI: 10.25077/jsolum.19.1.34-42.2022

Abstract

The demand for red potatoes is quite high, especially for supermarkets and culinary businesses that require potatoes as the basic ingredient. To achieve optimal potato production, it is necessary to provide sufficient fertilizer, while the price of artificial fertilizers is getting more expensive, therefore it is necessary to look for alternative low-cost fertilizers. The purpose of the study was to find out the benefits of Trichoderma sp. fungi as liquid organic fertilizer (POC), in an effort to diminish the use of artificial fertilizers towards organic potato cultivation. The experiment was carried out from June - September 2021 at Danau Kembar. This experiment was arranged in a completely randomized design (CRD), with 2 treatment factors and 3 replications. The first factor was the administration of POC Derma (fermented inoculant Trichoderma sp) doses consisting of 5 levels, namely: 0 ml L-1 (D0), 25 ml L-1 (D1), 50 ml L-1 (D2), 75 ml L-1 (D3), 100 ml L-1 (D4). The second factor the intensity of the application consists of two levels: (I1) 1 time a week and (I2) once every 2 weeks. Observational data were analyzed by means of variance using the F-test with a significant level of 5% and if the treatment had a significant effect, it was continued with the Least Significant Difference (BNT) test with a level of 5%. From the results of experiments that have been carried out, it is found that giving POC Derma (fermented inoculant Trichoderma sp) 75 ml L-1 inevery 2 weeks gave the highest production reaching 27.56 t ha-1 in semi-organic red potato cultivation.Key words: Derma liquid organic fertilizer, Trichoderma sp, red potato, semi organic

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