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All Journal Indonesian Journal of Geography JURNAL SAINS PERTANIAN EQUATOR CAUCHY: Jurnal Matematika Murni dan Aplikasi JTSL (Jurnal Tanah dan Sumberdaya Lahan) Jurnal Dinamika Pengabdian (JDP) INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi Jurnal Ilmu Tanah dan Sumber Daya Lahan Jurnal Pertanian Agros Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Jurnal Wana Tropika Jurnal Wana Tropika
Rossie Wiedya Nusantara
Fakultas Pertanian, Universitas Tanjungpura, Jalan A. Yani Pontianak, 78124
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Mathematics

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KAJIAN KARBON DAN HARA TANAH GAMBUT AKIBAT ALIH FUNGSI LAHAN GAMBUT DI KALIMANTAN BARAT Nusantara, Rossie Wiedya
PedonTropika Vol 3, No 1 (2017)
Publisher : PedonTropika

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Abstract

Alih fungsi hutan alami menjadi lahan pertanian, perkebunan dan hutan produksi dapat mengancam keberadaan ekosistem gambut alami dan berdampak terhadap lingkungan. Kerusakan lahan gambut terbesar terjadi melalui drainase dalam dan pembakaran tak terkendali. Tujuan penelitian ini adalah untuk menganalisis perubahan-perubahan hara dan C-organik tanah gambut akibat alih fungsi lahan. Lokasi kajian merupakan lahan gambut di Kabupaten Kubu-Kalimantan Barat dan terdapat 5 (lima) tipe gambut, yaitu hutan gambut primer (HP), hutan gambut sekunder (HS), semak belukar (SB), kebun sawit (KS) dan  kebun jagung (KJ). Analisis sampel tanah meliputi Nitrogen-total, Posfor-tersedia, Kalium-dd, Carbon organik tanah dan kadar abu.Hasil penelitian menunjukkan bahwa alih fungsi lahan dari hutan alami menjadi lahan pertanian dan semak belukar dan pengelolaan lahan menyebabkan penurunan P-tersedia (53,7%), K-dd (80,6 %), N-total (30,9%), C-organik (4,4%) dan peningkatan kadar abu tanah (81,5%). P-tersedia tanah gambut pada HP lebih tinggi daripada HS, KS, KJ, SB. K-dd pada HP lebih tinggi daripada SB, HS,KJ, KS. N-total pada HS lebih tinggi daripada SB, HP, KS, KJ. C-organik pada HP lebih tinggi daripada HS, SB, KS, KJ. . Perubahan penggunaan lahan berarti merubah ekosistem alami yang bersifat anaerob menjadi aerob sehingga mempercepat proses dekomposisi atau penguraian bahan organik dan pencucian hara  tanah gambut.
STUDY OF PHOSPHATE SOLUBILIZING FUNGI IN PEAT SOIL IN SEVERAL TYPES OF LAND USE OF SIANTAN HILIR VILLAGE PONTIANAK CITY Ariska, Nunung; Umran, Ismahan; Nusantara, Rossie Wiedya
Jurnal Sains Mahasiswa Pertanian Vol 8, No 2 (2019): April 2019
Publisher : Jurnal Sains Mahasiswa Pertanian

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Abstract

The use of peat land for agriculture is growing rapidly. However, in this utilization various problems were encountered, one of which was the strength of phosphate nutrients. One alternative to overcome the low availability of phosphate is to use a phosphate solvent fungus. This study aims to determine the population and type of phosphate solubilizing fungus and the population differences in several peatland uses (oil palm, pineapple, mustard, aloe, papaya and secondary forest) and to know the ability of fungi to dissolve phosphate nutrients. The methods used in this study are preparation, selection and observation of the location of the study, determination of sampling points, soil sampling (microbiology specific soil samples, sample samples and disturbed soil samples), preparation and sterilization of equipment and media in the laboratory, calculation and isolation fungus phosphate solubilizing colonies. The results showed that the highest population of phosphate solubilizing fungus (CPF) was found on pineapple land which was as much as 2.99 x 104 CFU / ml, and the lowest on aloe vera land was 2.11 x 104 CFU / ml. The analysis of the diversity of CPF population numbers on six land uses showed that the number of CPF populations had no significant effect. The types of fungi found were 13 types of solubilizing fungi. The land use which has the most phosphate solvent fungus types is oil palm and pineapple land. The ability of the fungus to dissolve phosphate can be seen from how large the clear zone is formed. Land use which has the largest area of clear zone is found in oil palm land which is equal to 242.31 mm2 and the smallest on pineapple land which is equal to 118.74 mm2. The test results of the analysis of the wide diversity of clear zones on aloe vera, papaya, mustard, oil palm, pineapple and secondary forest showed that the area of clear zones had no significant effect on land use. The land use system influences the diversity of phosphate solubilizing microorganisms and the ability to dissolve phosphate but the land use system does not affect the population of phosphate solubilizing fungi. Keywords: Phosphate Solubilizing Fungi, Phosphate, Peat Soil, Phosphate Solubilizing Microorganism, Clear Zone
SIFAT KIMIA TANAH ULTISOLS PADA AREAL UNTUK REPLANTING KELAPA SAWIT DAN HUTAN SEKUNDER DI DESA AMBOYO INTI KECAMATAN NGABANG Gayu, Adrianus; Suryadi, Urai Edi; Nusantara, Rossie Wiedya
Jurnal Sains Mahasiswa Pertanian Vol 10, No 1 (2021): Januari 2021
Publisher : Jurnal Sains Mahasiswa Pertanian

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Abstract

Tanah Ultisols dikenal sebagai tanah yang kurang subur tetapi pemanfaatannya dalam bidang pertanian sangat luas, khususnya pada bidang perkebunan kelapa sawit. Periode budidaya kelapa sawit di Desa Amboyo Inti telah berumur 33 tahun sehingga perlu dilakukan replanting. Tujuan dari penelitian ini adalah membandingkan sifat kimia tanah Ultisols pada areal untuk replanting kelapa sawit dengan hutan sekunder. Penelitian ini dilaksanakan di Desa Amboyo Inti Kecamatan Ngabang Kabupaten Landak. Analisis sifat kimia dan fisika tanah dilakukan di lapangan, Laboratorium Kimia dan Kesuburan Tanah, serta Laboratorium Fisika dan Konservasi Tanah Fakultas Pertanian Universitas Tanjungpura. Waktu penelitian berlangsung dari bulan Januari sampai April 2020. Titik pengamatan menggunakan sistem diagonal pada luasan 2 hektar untuk setiap penggunaan lahannya. Sampel tanah diambil secara utuh dan komposit pada kedalaman 0-30 cm dan 30-60 cm untuk masing-masing penggunaan lahan. Parameter sifat kimia tanah dalam penelitian ini adalah reaksi tanah (pH), karbon organik tanah (C-org) dan bahan organik tanah. Parameter pendukung pada pengamatan di lapangan adalah profil tanah dan sifat fisika tanah, seperti tekstur tanah. Hasil analisis menunjukkan reaksi tanah (pH) sangat masam pada kedua lahan di kedalaman 0-30 cm maupun 30-60 cm. Pada setiap penggunaan lahan, hasil analisis karbon organik tanah dan bahan organik tanah adalah rendah di kedalaman 0-30 cm dan sangat rendah di kedalaman 30-60 cm. Kata kunci : Sifat kimia tanah, Ultisols, replanting kelapa sawit, hutan Sekunder
Perubahan Kondisi Fisik Lahan Akibat Alih Fungsi Lahan Hutan Rawa Gambut Nusantara, Rossie Wiedya; Sudarmadji; Haryono, Eko; Djohan, Tjut S.
Jurnal Wana Tropika Vol 2 No 2 (2012)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Abstract

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An Application of Geographically Weighted Regression for Assessing Water Polution in Pontianak, Indonesia Debataraja, Naomi Nessyana; Kusnandar, Dadan; Nusantara, Rossie Wiedya
CAUCHY Vol 7, No 2 (2022): CAUCHY: Jurnal Matematika Murni dan Aplikasi (May 2022) (Issue in Progress)
Publisher : Mathematics Department, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/ca.v7i2.13266

Abstract

Geographically weighted regression (GWR) is an exploratory analytical tool that creates a set of location-specific parameter estimates. The estimates can be analysed and represented on a map to provide information on spatial relationships between the dependent and the independent variables. A problem that is faced by the GWR users is how best to map these parameter estimates. This paper introduces a simple mapping technique that plots local t-values of the parameters on one map. This study employed GWR to evaluate chemical parameters of water in Pontianak City. The chemical oxygen demand (COD) was used as the dependent variable as an indicator of water polution. Factors used for assessing water pollution were pH (X1), iron (X2), fluoride (X3), water hardness (X4), nitrate (X5), nitrite (X6), detergents (X7) and dissolved oxygen, DO, (X8). Samples were taken from 42 locations. Chemical properties were measured in the laboratory. The parameters of the GWR model from each site were estimated and transformed using Geographic Information Systems (GIS). The results of the analysis show that X1, X2, X3, X5, and X7 influence the amount of COD in water. The resulting map can assist the exploration and interpretation of data.
Water Management Zone Mapping on Peatland in Limbung Village Sungai Raya District Alyaminy, Qishtamy Wahyu; Nusantara, Rossie Wiedya; Krisnohadi, Ari
INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi Vol 8 No 1 (2024): February 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/intensif.v8i1.21357

Abstract

This study focuses on mapping peatland water management zones, which have not been mapped in previous research. These water management zones serve as crucial reference points for the development and implementation of the National Peatland Ecosystem Protection and Management Plan. The research applied various methods, including soil survey, drilling, soil sampling, measuring groundwater level and canal, matching methods, and create a peat water management zone map. Based on research and map overlays, five water management zones were obtained, these zones include Zone I (F2.B1.K1.C2) covering 1.39 ha (11.58%), Zone II (F1.B1.K1.C2) covering 0.82 ha (6. 83%), Zone III (F2.B1.K1.C3) covering 1.93 ha (16.08%), Zone IV (F1.B1.K1.C3) covering 3.86 ha (32.17%) and Zone V (F1.B1.K2.C3) covering 4.00 ha (33.33%). These water management zones will be related to conservation activities to maintain the quality of soil and water on peatlands. Peatland restoration management activities in Zone I can be accomplished by canal blocking and maximum planting patterns, in Zone II by canal filling and maximum planting patterns, in Zone III by canal blocking and enrichment plants, in Zone IV by canal backfilling and maximum planting patterns, and in Zone V by canal backfilling and deep wells.
ANALISIS BEBERAPA SIFAT KIMIA TANAH PADA DUA MACAM PENGGUNAAN LAHAN DI SUNGAI KAKAP, KABUPATEN KUBU RAYA, KALIMANTAN BARAT Fadilla, Ulfia; Nusantara, Rossie Wiedya; Manurung, Rinto
Jurnal Tanah dan Sumberdaya Lahan Vol. 11 No. 1 (2024)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2024.011.1.26

Abstract

Paddy fields and mixed farming apply intensive agricultural cultivation, and sustainable land use causes changes in land quality, one of which affects soil chemical properties. This study aimed to compare soil chemical properties based on differences in the use of paddy fields and mixed farming in Sungai Kakap District, Kubu Raya Regency, West Kalimantan. Research in the field in Pal IX Village, Sungai Kakap Sub-district, Kubu Raya Regency, for sampling soil samples at 0-20 cm depth. Soil analysis was conducted at the Chemistry and Soil Fertility Laboratory, Faculty of Agriculture, Tanjungpura University. The results showed that the two fields, paddy fields, and mixed farming, had almost the same chemical properties in paddy fields pH, organic C,  available P, cation exchange capacity (CEC), exchangeable Ca and exchangeable Mg.
PENGUJIAN TIGA METODE PENGUKURAN BOBOT ISI PADA TANAH GAMBUT Sinaga, Christina; Nusantara, Rossie Wiedya; Gusmayanti, Evi; Anshari, Gusti Zakaria
Jurnal Tanah dan Sumberdaya Lahan Vol. 11 No. 2 (2024)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2024.011.2.9

Abstract

This research aims to compare the methods of bulk density measurements in peat soils. The methods are ring sample, peat auger, and syringe. The research was conducted in peat soils in Pontianak City. The research was carried out from June to December 2023. Peat samples were the surface peat (0-10 cm). The samples were collected from five plots, and five replications. On average, the value of bulk density measured by the ring sample was 0.27 g cm-3, which is significantly different from bulk density values measured by the peat auger and syringe: 0.11 g cm-3 and 0.09 g cm-3, respectively. Bulk densities of peat auger and syringe are statistically indifferent. Soil compaction during sampling causes the ring sample's high bulk density value. Accordingly, carbon stock calculation based on ring sample bulk density is significantly higher than carbon stocks calculated by bulk densities of auger and syringe. The bulk density measurement with a peat auger took longer because a water displacement approach must measure the sample volume. Collecting bulk-density samples with a syringe is the easiest and fastest. The volume of the syringe sample is only 10 cm3, and the sample can be taken until the mineral substratum. The number of sample collected by syringe can be significantly increased at 5 cm sampling interval, or equals to 10 sub-samples per 50 cm peat core. Pearson linear correlations of these three methods are sufficiently strong.
Identifikasi Hambatan Pemanfaatan Limbah Cangkang dan Serabut Sawit sebagai Bahan Bakar Biomassa di Pabrik Kelapa Sawit Sambas Suprianto, Surya; Nusantara, Rossie Wiedya
Jurnal Pedontropika : Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 10, No 1 (2024): Februari
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v10i1.71636

Abstract

Pabrik kelapa sawit mengolah tandan buah segar menjadi crude palm oil (cpo) dan palm kernel (pk) melalui beberapa proses produksi. Sehingga dalam 1 ton tandan buah segar yang diolah akan menghasilkan limbah berupa janjangan konsong 23% (230 Kg), cangkang 6,5% (65 Kg), lumpur atau solid 4% (40 Kg), serabut 13% (130 Kg) dan limbah cair sebanyak 50%. Pemanfaatan limbah kelapa sawit sebagai sumber energi alternatif sedang marak-maraknya digencarkan. Hal ini dibuktikan dengan adanya pemanfaatan cangkang dan serabut kelapa sawit sebagai bahan bakar biomassa untuk boiler memanaskan air dalam tanki guna menghasilkan uap untuk menggerakkan turbin uap yang dihubungkan dengan generator penghasil listrik tenaga uap. Listrik yang dihasilkan akan dipakai untuk proses operasional pabrik dalam menggerakkan mesin-mesin produksi yang ada di pabrik kelapa sawit. Pabrik kelapa sawit akan beroperasi secara maksimal jika suplai listrik yang dihasilkan juga stabil atau tidak terjadi permasalahan dalam jalur hubungan instalasi produksi listrik bertenaga uap. Pemanfaatan cangkang dan serabut kelapa sawit sebagai bahan bakar utama pada boiler memiliki peran penting dalam memproduksi energi listrik. Dalam praktiknya di pabrik kelapa sawit pemenuhan listrik dengan bahan bakar biomassa berupa cangkang dan serabut kelapa sawit mengalami beberapa hambatan sehingga perlu untuk diketahui guna menyusun rencana strategis dan perbaikan berkelanjutan bagi manajemen perusahaan pabrik kelapa sawit. Hambatan-hambatan yang dihadapi perusahaan pabrik kelapa sawit secara umum dibagi dalam beberapa kategori seperti sumber daya manusia, peralatan mesin sumber listrik, perawatan instalasi sumber listrik, bahan bakar cangkang dan serabut sawit serta komitmen dari suatu perusahaan dalam menerapkan pemanfaatan cangkang dan serabut kelapa sawit sebagai bahan bakar biomassa untuk menghasilkan listrik tenaga uap. Penelitian ini dilaksanakan pada sebuah perusahaan pabrik kelapa sawit yang berada di salah satu kecamatan di kabupaten Sambas. Metode pengumpulan data dilakukan dengan cara wawancara mendalam dengan pertanyaan kunci kepada level tenaga kerja atau operator di bagaian boiler dan genset, kepada mandor proses, asisten proses dan pihak manajemen perusahaan yang diwakili oleh asisten kepala.
Karakteristik Kimia Tanah pada Beberapa Penggunaan Lahan di Desa Lumut Kecamatan Toba Kabupaten Sanggau Ningsih, Ratih Citra; Nusantara, Rossie Wiedya; Manurung, Rinto
Jurnal Pedontropika : Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 10, No 1 (2024): Februari
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v10i1.78353

Abstract

There has been no research on the analysis of soil chemical properties at the location, so this research was conducted to see how significant the differences in soil chemical properties are that occur in several land uses and slope classes, including oil palm plantations, rubber plantations and shrubs in Lumut Village, Toba District, Sanggau Regency. carried out within 6 months. Using a purposive random sampling method with an area of 12.5 ha per point, observation points were determined based on land use, slope class and soil type. The number of samples taken was 38 samples, the research parameters consisted of soil pH, C-organic, N-total, P-available, K-total, Ca-dd, Mg-dd, Na-dd, K-dd, KTK, KB and Saturation Al. The results of the research show that in the land use of oil palm plantations, rubber plantations and shrubs the pH parameter is classified as sour in the range of 4.84-5.36, the C-Organic criteria are medium to high at a value of 2.32-3.08%, N-Total criteria are moderate to very high at a value of 0.30-0.33%, P-available criteria are very low at a value of 4.71-8.52 mg/100 g, K-total criteria are very low at a value of 4.30 -6.42 mg/100 g, Ca-dd very low criteria at a value of 0.52-0.77 me/100 g, Mg-dd very low criteria at a value of 0.18-0.28 me/100 g, Na -dd low criteria at a value of 0.23-0.30 me/100 g, K-dd very low criteria at a value of 0.07-0.08 me/100 g, CEC medium to high criteria at a value of 20.45-32 .61 cmol(+)kg-1, and KB is classified as very low at a value of 4.18-11.47%, Al saturation criteria is very low at a value of 1.32-3.10 cmol(+)kg-1. The results of the research require further study of the characteristics of Ultisol soil at different depths and a study of soil fertility is needed so that it can be used as a reference for fertilization so that it is more targeted and produces the desired harvest.
Co-Authors . Lolita Alyaminy, Qishtamy Wahyu Anshari, Gusti Zakaria Anwari, Sofwan ari krisnohadi Ariska, Nunung Bambang Widiarso Dadan Kusnandar Debataraja, Naomi Nessyana Dewi Kurniati Eko Haryono Evi Gusmayanti Gayu, Adrianus Gusmayanti, Evi Gusmayanti Ismahan Umran Manurung, Rinto Ningsih, Ratih Citra shinta, Yashinta Sinaga, Christina Sudarmadji Sudarmadji Sudarmadji Sudrajat, Jajat Sudrajat Sulakhudin Sulakhudin Suprianto, Surya Tino Orciny Chandra Tjut S. Djohan Tjut Sugandawaty Djohan Triatmojo, Leo Pamungkas U Edi Suryadi Ulfia Fadilla Utama, Redian Risky Septi Virgiansyah, Irgi Warganda, . YVI, Urai Suci