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All Journal Journal of Degraded and Mining Lands Management Jurnal Agroteknos AGRISAINTIFIKA Jurnal Ilmu-ilmu Pertanian Berkala Penelitian Agronomi Agrica: Journal of Sustainable Dryland Agriculture Fruitset Sains : Jurnal Pertanian Agroteknologi Agrivet: Jurnal Ilmu-ilmu Pertanian dan Peternakan JATIMAS : Jurnal Pertanian dan Pengabdian Masyarakat Agritechpedia: Journal of Agriculture and Technology
Suleman, Darwis
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science Materials Science & Nanotechnology Social Sciences

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ISOLASI DAN IDENTIFIKASI KAPANG PELARUT PHOSPHATE DARI RIZOSFER GADUNG (DIOSCOREA HISPIDA DENNST) DAN BAMBU (DENDROCALAMUS ASPER) Suleman, Darwis; Sani, Asrul; Ambardini, Sri; Yanti, Nur Arfa; Boer, Dirvamena
Berkala Penelitian Agronomi Vol 7, No 2 (2019)
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/bpa.v7i2.10564

Abstract

Fosfor (P) merupakan hara utama kedua yang membatasi produksi tanaman, namun ketersediaannya di dalam tanah sangat masalah karena reaksi presipitasi dengan Al+3 dan Fe+3 pada tanah masam atau Ca+2 pada tanah alkalin. Selama beberapa tahun terakhir, pemanfaatan mikroba tanah di anggap sebagai salah satu alternatif untuk meningkatkan ketersediaan P untuk tanaman. Penelitian ini bertujuan untuk mengisolasi dan mengidentifikasi kapang pelarut fosfat dari rizosfer bambu dan gadung. Isolasi kapang pelarut fosfat dilakukan pada kondisi in vitro, melalui serangkaian pengenceran dengan menggunakan media Pikovskaya padat. Hasil penelitian diperoleh dua isolat dari rizosfer gadung dan satu isolat dari rizosfer bambu. Namun, hasil uji kelarutan P hanya satu isolat dari gadung yang menunjukkan zona bening di sekitar koloni. Secara kualitatif, kelarutan P bervariasi antara 2,405 dan 2,052 untuk gadung dan bamboo. Analisis numerik-fenetik mengungkapkan bahwa isolat kapang dari gadung terdeteksi sebagai Talaromyces aculeatus dengan indeks kesamaan 100% dan isolat kapang dari bambu teridentifikasi sebagai Fuzarium proliferatum dengan indeks kesamaan 89,7% dibandingkan dengan kapang acuan.Kata kunci : Asam organik, kapang, phosphate,  pelarut, rizosfer
PERUBAHAN BEBERAPA SIFAT KIMIA TANAH DAN PERTUMBUHAN TANAMAN JAHE MERAH SETELAH APLIKASI KOMPOS KULIT PISANG KEPOK PADA ULTISOL MASAM SULEMAN, DARWIS
Jurnal Agroteknos Vol 14, No 2 (2024)
Publisher : Jurnal Agroteknos

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Abstract

The increasing need for red ginger as a raw material for medicines is a challenge for the farmers, but unfortunately ginger production is still lower than local and export demand. Basically, low soil fertility is a major obstacles in improving the productivity of ginger plants. This study aims to evaluate the changes of several soil chemical properties and the growth of red ginger plants treated with banana peel compost. This research was carried out at the Experimental Farm at the Faculty of Agriculture, Halu Oleo University from August to October 2021. This study used a randomized block design comprised of 4 treatments, namely K0 = no compost, K1 = 10 t ha-1 (400 g polybag-1), K2 = 20 t ha-1 (800 g polybag-1), K3 = 30 t ha-1 (1,200 g polybag-1) and repeated 4 times. The results revealed that the application of banana peel compost improved soil quality by increasing soil pH, organic C, CEC and total soil K. The improvements of soil properties were linear until the application of banana peel compost at 40 t ha-1. The application of banana peel compost has a significant effect on plant height and number of leaves and the impact was linear up to application of 30 t ha-1 (K3).
Konservasi Tanah dan Air di Perkebunan Kelapa Sawit Desa Wawolemo Kabupaten Konawe Demi Pembangunan yang Berkelanjutan Alam, Syamsu; Hemon, M Tufaila; Suleman, Darwis; Leomo, Sitti; Yusuf, Dewi Nurhayati; Rustam, La Ode; Fatimah, Sitti; Perkasa, Muh. Alwis Arya; Kusumawati, Anna
JATIMAS : Jurnal Pertanian dan Pengabdian Masyarakat Vol. 4 No. 1 (2024): MEI
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jatimas.v4i1.5584

Abstract

Soil and water conservation efforts continue to be encouraged, considering the increasing number of openings of oil palm plantations that occur in various regions, including Wawolemo Village Konawe Regency. Clearing new land for oil palm planting is generally carried out by land clearing, which has the potential to cause erosion, so soil and water conservation efforts are needed to prevent land degradation, especially the loss of nutrients in the topsoil layer due to erosion. This community service activity aims to provide the community in Wawolemo Village with an understanding of the importance of soil and water conservation. Activities carried out in January 2024 for the farmers/community of Wawolemo Village. The method used was in the form of lectures or counseling and evaluation, where questionnaires were filled out before and after the activity took place. The results of the activity showed that there was an increase in the understanding and insight of the Wawolemo Village community after being provided with education, especially about erosion, soil, and water conservation techniques, as well as environmentally friendly and sustainable palm oil plantation practices based on soil and water conservation. By implementing a soil and water conservation system, smallholder oil palm growers are also expected to be able to save on fertilizer costs, which have been considered quite large, in order to obtain optimal production. Upaya konservasi tanah dan air terus digalakkan mengingat semakin banyaknya pembukaan kebun kelapa sawit yang terjadi di berbagai daerah, tidak terkecuali Desa Wawolemo Kabupaten Konawe. Pembukaan lahan baru untuk penanaman kelapa sawit umumnya dilakukan dengan cara land clearing yang berpotensi menyebabkan erosi, sehingga diperlukan upaya konservasi tanah dan air untuk mencegah terjadinya degradasi lahan terutama hilangnya unsur hara pada lapisan tanah atas karena erosi. Kegiatan pengabdian kepada masyarakat ini bertujuan memberikan pemahaman kepada masyarakat di Desa Wawolemo tentang pentingnya konservasi tanah dan air. Kegiatan dilakukan pada bulan Januari 2024 pada petani/masayarakat Desa Wawolemo. Metode yang digunakan berupa ceramah atau penyuluhan dan evaluasi dengan mengisi kuesioner sebelum dan sesudah kegiatan berlangsung. Hasil kegiatan menunjukkan terjadi peningkatan pemahaman dan wawasan masyarakat Desa Wawolemo setelah diberikan penyuluhan terutama tentang erosi, teknik konservasi tanah dan air, serta praktik perkebunan kelapa sawit yang ramah lingkungan dan berkelanjutan berbasis konservasi tanah dan air. Dengan penerapan sistem konservasi tanah dan air, pekebun sawit rakyat juga diharapkan dapat berhemat dari biaya pemupukan yang selama ini dianggap cukup besar untuk mendapatkan produksi yang optimal.
Change of soil chemical properties and the growth of Pogostemon cablin Benth on nickel-mined soil amended with rice husk charcoal Suleman, Darwis; Resman, Resman; Syaf, Hasbullah; Namriah, Namriah; Suaib, Suaib; Alam, Syamsu; Yusuf, Dewi Nurhayati; Mbay, Wa Ode Nurmashita
Journal of Degraded and Mining Lands Management Vol. 11 No. 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.112.5353

Abstract

Nickel is an important main resource mineral in Southeast Sulawesi, which has deposited around 97.4 billion tons, and undoubtedly, nickel exports emerged in national and regional economic growth. Mining activities were carried out through topsoil and subsoil stripping, resulting in damage to the soil ecosystem and making it difficult for soil to recover. A study was performed to evaluate the changes in soil chemical properties and the growth of patchouli (Pogestemon cablin Benth) on nickel-mined soil treated with rice husk charcoal (RHC). A randomized block design was applied in this study, including six treatments of RHC with three replications. The treatments were without RHC (control), 1.5%, 3.0%, 4.5%, 6%, and 7.5% of soil weight. Data were analyzed descriptively for soil chemical properties; meanwhile, ANOVA was applied for plant growth. The results revealed that RHC increased soil pH, organic C, CEC, and available P, and conversely, the application of 4.5% of RHC decreased soil Ni and Fe content by 65.43% and 40.47%, respectively. The application of RHC up to 6% increased significantly the plant height and number of leaves as well as the dry weight of patchouli. The present study concluded that the use of carbon-rich soil conditioners such as rice husk charcoal is an imperative measure to restore the nickel-mined soil.
PERUBAHAN pH, C-ORGANIK DAN N TOTAL TANAH MASAM PADA PERTANAMAN BUNCIS SETELAH PEMBERIAN PUPUK KANDANG DI KAMBU, KENDARI Suleman, Darwis; Alam, Syamsu
Fruitset Sains : Jurnal Pertanian Agroteknologi Vol. 12 No. 5 (2024): December: Ilmu Pertanian dan Bidang Terkait
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/fruitset.v12i5.5837

Abstract

Acid soils such as Ultisol has many constrains for the development of greenbean such as low pH, organic C, CEC and low nutrients available. In this context, the use of manure is an alternative to improve soil quality and increase the productivity of greenbean. A study was carried out at the Experimental Farm of the Faculty of Agriculture, Halu Oleo University on which the study aimed to evaluate the effect of manure and dosage on soil pH, organic C and total-N as well as the yield of greenbean. The study was laid out in a Split-plot design with three replications. The main plot consisted of three types of manure (chicken, goat and cow). The subplots, namely fertilizer doses, consisted of: without manure serve as a control, 200 g of polybeg-1, 400 g of polibeg-1 and 600 g of polibeg-1. The results highlighted that the type of manure has different effect on soil pH, organic C and total-N. The highest soil pH and organic C were recorded when applying 600 g polibeg-1 of chicken manure, while the highest of total-N was observed when applying 600 g of polibeg-1 of cow manure. The type of manure and application rate increased significantly the yield of greenbean, but no interaction was observed. This study concluded that the application of goat and chicken manure at the rate of 200 – 400 g polybeg-1 enhanced significantly the yield of greenbean.
Evaluasi Kesuburan Tanah Sawah pada Sentra Pertanaman Padi Sawah di Kecamatan Wawonii Utara Febriansyah, Muhammad Fahrul; Suleman, Darwis; Alam, Syamsu; Pasolan, Yulius B.; Leomo, Sitti; Rustam, La Ode
Agritechpedia Vol. 2 No. 02 (2024): Agritechpedia
Publisher : CV. Eduartpia Publisher

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Abstract

Soil fertility is one of the main factors affecting agricultural land productivity. Evaluation of soil fertility in rice fields needs to be carried out to identify nutrient status and soil fertility, and to determine site-specific fertilization recommendations. This study aims to evaluate soil fertility status and determine fertilization recommendations in rice fields in Tumburano Village, North Wawonii District. This study was conducted from July to October 2023 using a random sampling survey method based on differences in slope positions, namely upper, middle and lower rice fields. Soil sampling was carried out at each slope position with 3 replications. The results showed that soil pH varied between 7.14-7.55 (neutral), soil organic C ranged from 4.04-6.29% (very high), and Total N ranged from 0.41-0.61% (very high). While available P ranged from 10.89-12.56 ppm (moderate), available K varied between 0.34-0.35 cmol (+) kg⁻¹ (low). The soil CEC varies between 24.46-27.21 me 100 g⁻¹ (medium-high) and BS ranges between 71.84-77.47% (high). Based on the results of the assessment of soil chemical properties, it can be concluded that the level of soil fertility in the study area is in the low to medium category. The results of this study recommend fertilization: 250 kg ha-1 urea, 75 kg ha-1 SP-36, and 100 kg ha-1 KCl (if using single fertilizer), and a dose of 300 kg ha-1 plus 150 kg ha-1 urea, if compound fertilizer. It is also recommended to use 5 t ha-1 of straw to reduce synthetic fertilizers
PENGARUH KEMIRINGAN LERENG TERHADAP KUALITAS TANAH PADA PERTANAMAN NILAM DI KECAMATAN WOLASI, KABUPATEN KONAWE SELATAN Suleman, Darwis; Alam, Syamsu; Rustam, La Ode; Yusuf, Dewi Nurhayati
AGRICA Vol. 18 No. 1 (2025): June
Publisher : Agriculture Faculty of Flores University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/agr.v18i1.5394

Abstract

The slope gradient is one of the critical factors influencing soil functions through erosion, transportation and soil sedimentation. The general objective of this study was to evaluate the change of soil quality at different slopes gradient and specifically to prepare a soil quality data base as a reference for making sustainable land use policies. This study used a systematic free survey method in which the sample points were determined purposively based on the slope gradient, namely 0-8% and 8-15%. Three sample points were set up at each slope gradient comprising 4 subsamples each and then composited, so that 9 composite samples were obtained. Soil properties observed include texture, pH, organic C, total N, available P and K. The results highlighted that the soil organic C, total N and available K at 0-8% slope gradient increased by 88.25%, 29.87% and 10.53% respectively compared to the 8-15% slope gradient. The Soil Quality Index (SQI) at 0-8% and 8-15% slopes gradient was recorded by 0.70 (good) and 0.60 (moderate), respectively. It was observed a decline in organic C and total N as well as available K with an increasing of slope gradient. Therefore, it is highly recommended to practice a conservation planting system to avoid a decline in soil quality in the future.
CHANGES IN SOIL CHEMICAL PROPERTIES AND TOMATO CROPS YIELD GIVEN MARKET WASTE COMPOST LEASE Suleman, Darwis; Alam, Syamsu; Rustam, La Ode; Setiawan, Agus
Agrisaintifika: Jurnal Ilmu-Ilmu Pertanian Vol. 9 No. 2 (2025): Agrisaintifika
Publisher : Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/ags.v9i2.6340

Abstract

Long-term use of chemical fertilizers could accelerate the decline in soil quality, while organic waste from fruit markets in Kendari City increases every year in line with the increase of population. In this regard, the goal of this study was to evaluate the effect of leachate from fruit market waste compost on several soil chemical properties and tomato yield on Ultisol. The study was carried out on experimental farm at the Faculty of Agriculture, Halu Oleo University from December 2021 to February 2022. This study used a randomized block design consisted of 4 treatments, namely: No leachate (P0), 200 ml polybag-1 (P1), 400 ml polybag-1 (P2), 600 ml polybag-1 (P3). The results highlighted that the application of leachate from fruit market waste increased organic C, total N, available P and total K in the soil linearly. The highest increase was achieved when applying 600 ml per polybag-1 (P3) of leachate by 49.83%, 42.85%, 71.68% and 72.82% over the control (P0). Application of leachate improved the plant height, number of branches, number of fruit and fruit weight compared to other treatments. The highest number of fruit and the heaviest fruit weight were recorded when supplementing 600 ml of polybag-1 leachate by 6.33 pieces and 85.60 g. Keywords: Leachate, organic C, tomato, ultisol
Kelimpahan dan keanekaragaman makrofauna tanah sebagai perekayasa kesuburan tanah pada penggunaan lahan yang berbeda di Kota Kendari Suleman, Darwis; Alam, Syamsu; Rustam, La Ode
Agrivet : Jurnal Ilmu-Ilmu Pertanian dan Peternakan (Journal of Agricultural Sciences and Veteriner) Vol. 13 No. 1 (2025): Juni
Publisher : Fakultas Pertanian Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/agrivet.v13i1.13222

Abstract

Land use patterns are prominent factors affecting the abundance and diversity of soil macrofauna and in turn affect structure and soil function. This study was carried out on farmers' land from October to December 2022. The study aims to evaluate the abundance, diversity and dominance as well as the richness of soil macrofauna on coconut and rambutan area and reeds field. Sampling for soil macrofauna used the monolith method and separation of macrofauna using hand sorting techniques. Monolith plots measuring of 20 x 20 cm with a depth of 20 cm were placed randomly for each land use with 3 replications. Data analysis was carried out on abundance, diversity and dominance of macrofauna as well as the taxon richness. Analysis of variance was also applied on the abundance and diversity of macrofauna. The results highlighted that the abundance and diversity of soil macrofauna was the highest in the reeds land in which the soil never been disturbed, followed by coconut and rambutan plantations. On the other hand, termite was dominance in coconut plantations by 82.30%, while earthworm was dominance in rambutan plantations by 64.36%. The current study concluded that the existence of soil macrofauna is a paramount important to be maintained as the main soil fertility engineer in agricultural land.
Co-Authors Agus Setiawan Asrul Sani DIRVAMENA BOER, DIRVAMENA Febriansyah, Muhammad Fahrul Hasbullah Syaf HEMON, M TUFAILA Kusumawati, Anna Leomo, Sitti Mbay, Wa Ode Nurmashita Namriah, Namriah Nur Arfa Yanti Pasolan, Yulius B. Perkasa, Muh. Alwis Arya Resman, Resman Rustam, La Ode Sitti Fatimah Sri Ambardini Suaib, Suaib SYAMSU ALAM Yusuf, Dewi Nurhayati