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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

Texture and Chemical Properties of Two Depth Soils in a Toposequence of Anak Krakatau Before December 2018 Eruption Astriana Rahmi Setiawati; Jamalam Lumbanraja; Septi Nurul Aini; Dermiyati Dermiyati; Henrie Buchari; Zuldadan Naspendra
JOURNAL OF TROPICAL SOILS Vol 25, No 2: May 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i2.71-81

Anak Krakatau volcano is one of the famous volcanic mountains located in the sea to the south part of the Province of Lampung, Indonesia. The volcano was derived from the active Krakatau caldera that first appeared on the surface in 1930 or 47 years after the eruption of Krakatau in 1883. The materials produced by the Anak Krakatau eruption were very interesting related to soil forming materials, especially their physical and chemical properties. The objectives of this study were to present information about the texture and chemical properties of soil from Anak Krakatau Mountain taken at the southeast slope before the December 2018 eruption at two different depths. This study was conducted in March to September 2019 which consisted of two parts: (1) soil survey in the field and (2) soil analysis in the laboratory. Soil samples were taken from a toposequence at seven points with an interval about 15m above sea level (asl) on the southeast slope (approaching northeast) of the Anak Krakatau in July 2018 at the depth of 0-20 cm and 20-40 cm. The soil texture of Anak Krakatau mountain before eruption in December 2018 was sandy with the percentage of sand 98.82 - 99.59%; silt 0 - 0.59%; and clay 0.41 - 0.74%. The soil chemical properties of Anak Krakatau mountain were soil pH (H2O) 4.95 – 6.27; soil pH (KCl) 4.75 – 5.89; Cation Exchange Capacity 0.41 – 2.02 cmol(+) kg-1; Base Saturation 117.24 – 514.63%; CaO 2.63 – 6.34%; MgO 3.06 – 6.13%; K2O 0.019 – 0.034%; Na2O 0.035 – 0.080%; P-retention 82.10 – 84.74%; and organic carbon 0.06 – 0.72%. The SEM-EDX analysis showed that the amounts of Mg and Na were more than 1% and there were several trace elements present in Anak Krakatau soil, namely Sb (Stibium), Nb (Niobium), Y (Yttrium), F (Flour), Co (Cobalt), and Ba (Barium).

Strategi Peningkatan Daya Saing Pengembangan Agribisnis Kopi Di Sumatera Barat Rahmi Awalina; Ayendra Asmuti; Zuldadan Naspendra; Syaifuddin Islami
Jurnal Riset Perkebunan Vol. 3 No. 1 (2022): Jurnal Riset Perkebunan (JRP)
Publisher : Jurusan Budidaya Perkebunan

Indonesia is the third largest coffee exporting country in the world after Vietnam. In the current era of trade globalization, market competition is increasingly more stringent, where each country opens up their markets to one another. Therefore, we need to analyze the competitiveness and development of Indonesian coffee agribusiness. Competitiveness The analysis is perfomed by analyzing the comparative advantage Revealed Comparative Advantage (RCA) and competitive advantage with Diamond Porter's theoretical approach. The results show that Indonesian coffee, especially West Sumatra, has a competitive advantage, both comparative and competitive. The analysis used for produce an agribusiness development strategy is by SWOT analysis (Strengths, Weaknesses,Opportunities and Threats). The strategy resulting from the analysis is more focused on the technical aspect and cultivation of coffee commodity development.

Analisis Kesesuaian Lahan Untuk Pengembangan Tanaman Jagung (Zea Mays L.): Land Suitability Analysis for Developing Corn (Zea Mays L.) Cultivation Zuldadan Naspendra
Agrifarm : Jurnal Ilmu Pertanian Vol 11 No 2 (2022): Jurnal Agrifarm
Publisher : Universitas Widya Gama Mahakam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24903/ajip.v11i2.1941

Kebutuhan jagung nasional sebagai bahan pangan maupun sebagai pakan semakin meningkat. Pada tahun 2020 Indonesia mengimpor jagung 911.194 ton. Oleh sebab itu setiap daerah perlu mengoptimalkan pemanfaatan lahannya sesuai daya dukung lahan. Salah satu daerah potensial untuk pengembangan jagung adalah Sumatera Barat. Oleh sebab itu dilakukan penelitian ini dengan tujuan: a) mengkaji kesesuaian lahan untuk tanaman jagung, b) menganalisis faktor pembatas dan alternatif perbaikan lahan. Analisis geodatabase menggunakan pendekatan GIS-based multi-criteria and legacy soil data, sedangkan metode matching digunakan untuk analisis kesesuaian. Hasil penelitian menunjukkan bahwa 33.9% lahan di Sumatera Barat sesuai untuk budidaya jagung (1,210,592.9 ha) yang terdiri dari kelas S1 seluas 169.5 ha, kelas S2 seluas 143,761.2 ha, dan kelas S3 1,066,662.2 ha; sedangkan 66% lahan tidak sesuai untuk budidaya jagung karena faktor lereng dan media perakaran. Lahan kelas S2 dan S3 memiliki subkelas utama S2.tc.wa.eh yang terdapat di Dharmasraya dan Sijunjung, S3.wa.oa di Pesisir Selatan, dan S3.wa di Pasaman Barat. Faktor pembatas utama subkelas lahan S2 dan S3 disebabkan oleh curah hujan tinggi, lereng curam, dan drainase terhambat. Kata kunci : Matching, Geodatabase, kesesuaian lahan, perbaikan lahan.

Laccase activity as an indicator of peat degrading microbes in several types of peatlands use in West Sumatra, Indonesia Hijri, Nurul; Naspendra, Zuldadan; Harianti, Mimien; Budi Prasetyo, Teguh
Jurnal Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Land clearing and drainage activities on peatlands had boosted the decomposition rate of organic matter, caused by an increase in soil temperature and soil microbial activity. Enzyme activity is a sensitive indicator to measure changes in the decomposition process. The enzyme activity associated with the decomposition of organic matter is Laccase. This research aimed to study Laccase as an indicator of lignin degradation in several types of peatland use in Pesisir Selatan, West Sumatra, namely forests, shrubs, oil palm plantations, agricultural land, and bare land. The Laccase activity was measured by using the ABTS method. The results of our study show that Laccase activity in several types of peatland use from the highest to the lowest follows the order: agricultural land (LP) 3.20 μg.g-1.hour-1 > bare land (LT) 1.46 μg.g-1.hour-1 > shrub (SB) 1.17 μg.g-1.hour-1 > smallholder oil palm plantation (PSr) 0.66 μg.g-1.hour-1 > private company oil palm plantation (PSs) 0.70 μg.g-1.hour-1 > forest (H) 0.06 μg.g-1.hour-1. Soil characteristics that affect the enzyme activity are water content, which is negatively correlated with the Laccase enzyme. The higher the water content in the peat material, the lower the Laccase activity. Therefore, it is necessary to control the soil water content high to prevent the rate of peat decomposition. Keywords: Laccase, enzyme, oil palm plantation, land use, peatland.

Pengaruh Morfometri Daerah Aliran Sungai Air Dingin Dalam Upaya Mitigasi Bencana Banjir di Kota Padang Awalina, Rahmi; Naspendra, Zuldadan
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 12 No. 1 (2024): April 2024
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2024.012.01.06

Banjir merupakan proses alami yang dapat menjadi bencana ketika dataran banjir dan daerah tangkapan air ditempati dan dibangun oleh manusia. Seiring dengan pertumbuhan penduduk yang pesat, pengelolaan sumber daya alam telah berubah dan menyebabkan risiko banjir. Kawasan hutan di bagian hulu yang beralih fungsi menjadi lahan pertanian dan pemukiman membuat fungsi daerah resapan air dalam merembes dan menampung air menjadi berkurang. Lahan gundul tanpa vegetasi menyebabkan risiko erosi dan meningkatkan potensi risiko kerusakan. Selain itu, kondisi ini meningkatkan kecepatan air dan menyebabkan gerusan tanah serta tanah longsor. Penelitian ini bertujuan untuk mengidentifikasi strategi mitigasi banjir yang efektif dalam konteks perubahan penggunaan lahan di daerah aliran sungai, khususnya akibat alih fungsi hutan menjadi lahan pertanian dan pemukiman. Studi ini menganalisis mitigasi banjir di wilayah studi dengan menggunakan pendekatan morfometri. Penelitian melibatkan koordinasi dengan pemangku kepentingan, termasuk lembaga terkait, sektor swasta, dan masyarakat setempat, untuk meminimalisir risiko banjir. Hasil penelitian menekankan pentingnya kerja sama dan koordinasi antar pemangku kepentingan untuk mencegah banjir. Pengendalian banjir harus dilakukan secara komprehensif, melibatkan pendekatan multidisiplin yang mempertimbangkan aspek teknis, sosial, hukum, ekonomi, dan lingkungan. Pendekatan yang terpadu dan berkelanjutan diperlukan untuk mengelola banjir dengan baik dan efektif.

The Changes of Peat Chemical Characteristics which is Converted from Oil Palm to Corn Plantation Areas In Kinali, West Pasaman Regency, West Sumatra Harianti, Mimien; Prasetyo, Teguh Budi; Junaidi, Junaidi; Naspendra, Zuldadan; Batara, Dewi Syaputri
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 2 No. 2 (2022): July 2022
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v2i2.34

The decline in production prices and land ownership shifts have caused people to choose to convert oil palm plantations into corn plantations. Changes in land cover from plantation crops to annual crops is potentially to reduce the chemical properties of peat. This study aims to identify changes in the chemical properties of peat on land for conversion of oil palm to corn plantations. This research was carried out from May to September 2021. Observations and peat sampling were carried out using the Transect method, perpendicular from the drainage channel based on a distance of 2m, 200m, and 400m from the main canal in maize conversion age < 2 years, (3) maize planting aged conversion 2 years. For each land use, 3 sample points were taken with 2 replications at a depth of 0-20 cm and 20-40 cm. The chemical properties of peatlands that have been converted from oil palm plantations to corn plantations include pH 4.18-4.98, water content 163.76-495.81%, ash content 15.5-72.12%, C-Organic 16.18-49.02%, N-Total 1.25-6.92%, P-Total 5.56-255.87 ppm, P-Available 0.63-157.43 ppm, K-dd 0, 38-1.98 me/100g, Na-dd 3.97-13.84 me/100g, Ca-dd 12.26-23.12 me/100g, Mg-dd 14.66-50.84 me/100g , CEC 63.30-498.16 me/100g, total acidity 570-600 cmol/kg-1. After land conversion, the quality of peatlands increased, especially at the age of conversion <2 years and decreased with increasing age of land conversion.

Strategi Peningkatan Daya Saing Pengembangan Agribisnis Kopi Di Sumatera Barat Rahmi Awalina; Ayendra Asmuti; Zuldadan Naspendra; Syaifuddin Islami
Jurnal Riset Perkebunan Vol. 3 No. 1 (2022): Jurnal Riset Perkebunan (JRP)
Publisher : Jurusan Budidaya Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrp.3.1.18-26.2022

Indonesia is the third largest coffee exporting country in the world after Vietnam. In the current era of trade globalization, market competition is increasingly more stringent, where each country opens up their markets to one another. Therefore, we need to analyze the competitiveness and development of Indonesian coffee agribusiness. Competitiveness The analysis is perfomed by analyzing the comparative advantage Revealed Comparative Advantage (RCA) and competitive advantage with Diamond Porter's theoretical approach. The results show that Indonesian coffee, especially West Sumatra, has a competitive advantage, both comparative and competitive. The analysis used for produce an agribusiness development strategy is by SWOT analysis (Strengths, Weaknesses,Opportunities and Threats). The strategy resulting from the analysis is more focused on the technical aspect and cultivation of coffee commodity development.

The impact of sand and clay substratum types on the properties of tropical peat soils and oil palm (Elaeis guineensis) production Naspendra, Zuldadan; Hijri, Nurul; Awalina, Rahmi; Harianti, Mimien; Hermansah, Hermansah
Journal of Degraded and Mining Lands Management Vol. 12 No. 3 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.123.7817

Research on peatlands has become increasingly interesting in recent years, particularly in tropical regions. In these regions, including Indonesia, peatlands develop over sand and clay substrata and are widely utilized for oil palm cultivation. However, the influence of substratum type on palm yield remains poorly understood. This study aimed to a) investigate the morphological and physical characteristics of peat soils formed over sand and clay substrata and b) examine the relationship between peat soil substratum types (sand and clay) and oil palm production. Soil samples were collected from three blocks of an oil palm plantation in Pesisir Selatan, West Sumatra, and then were analyzed in a soil laboratory. Additionally, fresh fruit bunch (FFB) yield data from the past six years for each block were also collected from the plantation records. The results indicated that peat soil formed over clay substratum (L) was more mature (sapric), with lower fiber content, higher ash content, lower organic matter content, higher moisture content, and higher pH compared to peat soils formed over sand substratum (P1 and P2). The average annual fresh fruit bunch production from palms cultivated on peat soil with a clay substratum (19.68-20.85 t/ha/yr) was 11-16% higher than that of palms on peat soil with sand substratum (23.52 t/ha/yr). Among the peat soil properties analyzed, water content, ash content, and soil pH had the most significant positive effects on oil palm production. These findings highlight the critical role of substratum type in influencing oil palm yield.

SOSIALISASI DAN PELATIHAN TEKNOLOGI IRIGASI HEMAT AIR SERTA BUDIDAYA PADI SISTEM JAJAR LEGOWO 4 : 1 PADA KELOMPOK TANI TARUKO SAIYO Ramadhan, Nugraha; Dwipa, Indra; Yanti, Nika Rahma; Naspendra, Zuldadan; Hervani, Dini; Muhsanati, Muhsanati; Obel, Obel; Martinsyah, Rachmad Hersi; Sari, Afrima; Utama, Syahrul; Lukito, Chandra; Ronaldi, Ronaldi; Pahlevi, Ilhan; Pasha, Fadhil Kemal
Jurnal Abdi Insani Vol 11 No 4 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i4.1891

In terms of paddy cultivation systems, the Taruko Saiyo farmer group currently still uses a conventional rice cultivation system, both from the irrigation system and the planting method. So there are several problems encountered in this farmer group, namely in the production-management aspect and the socio-cultural aspect. The objectives of the implementation of the Community Partnership Program Helping Nagari Build (PKM-MUB) are: 1) Application of AWD (Alternate Wetting and Drying) technology in order to save the use of irrigation water for Taruko Saiyo farmer groups, 2) Providing assistance for the rice cultivation system of the Jajar Legowo 4: 1 to increase rice production effectively, efficiently and sustainably in the Taruko Saiyo farmer group, and 3) Increasing the level of empowerment of partners from the aspects of production-management and socio-cultural aspects, namely ≥ 75%, and making Taruko Saiyo as an independent farmer group. This community service activity was carried out from July to November 2024. The community service program carried out in the form of socialization, training, and application of technology. In general, partners have understood the technical application of AWD (Alternate Wetting and Drying) technology in order to save the use of rice field irrigation water, as well as the rice cultivation system of the Jajar Legowo 4 method: 1 as an effort to increase rice production effectively, efficiently and sustainably.

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