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PERTUMBUHAN HUTAN TANAMAN JATI (Tectona grandis Linn.f.) DI KALIMANTAN TIMUR Murtinah, Veronika; Marjenah, Marjenah; Ruchaemi, Afif; Ruhiyat, Daddy
Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Vol 14, No 2 (2015): Oktober
Publisher : Universitas 17 Agustus 1945 Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31293/af.v14i2.1435

The Growth of Teak Plantation Forest in East Kalimantan. Teak is one of the most important tropical timber in the international timber market because of the various advantages it has and the type of wood that is very valuable for forestry plants. Teak has been known and cultivated for a long time, particularly in Java. In East Kalimantan, Teak has been developed by public and private companies , with a growth of diverse.The growth of teak stands in East Kalimantan in general showed a decline in growth with increasing stand age; diameter and height growth of stands highest in the early phase of growth in the range of 1-5 years of age, then decline gradually and growth has declined after the 12 year old stands; up to 12 year old stands generally teak growth in East Kalimantan showed growth (increment) in diameter and a height higher than the other locations teak plantation in Java.

ESTIMASI ANGKUTAN SEDIMEN MELAYANG DAN KUALITAS AIR SUNGAI DI KAWASAN EKOSISTEM PENTING LAHAN BASAH MASANGAT SUWI KALIMANTAN TIMUR As, Muli Edwin; Murtinah, Veronika; Bang, Falentino Usat; Sulistyorini, Iin Sumbada; Kusneti, Monica; Isa, Nur Linda
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 1 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.1.7

The Important Ecosystem Area of Mesangat Suwi Wetlands has a total area of around 14,722.69 ha located in East Kutai Regency, East Kalimantan. These wetlands have a strategic role as a regulators of the upstream water system, a source of freshwater fisheries, and a habitat for important protected animals. This study aimed to determine the rate of suspended sediment transport and river water quality. The study was conducted in two stages, the first was data and sample collection in the field, and the second was laboratory testing. The results of the study showed that the river water discharge and TSS in the Suwi and Masangat Rivers at the study location were directly proportional to the height of suspended sediment. The total average of suspended sediment in Suwi was smaller, it's 0.79 tons/year compared to Masangat at 2.64 tons/year. suspended sediment grains could settle and become bottom sediment. The rate of sedimentation in the river would accelerate the shallowing process which affected the wetlands ecosystem. The reduction in vegetated or forested areas in the Masangat wetlands was due to high human activity compared to Suwi. Currently, the water quality in the study areas, including COD, BOD, TDS, and TSS, is generally still below the standard quality threshold and is categorized as class two, namely water that can be used for freshwater fish farming, recreational facilities, livestock farming, and can be used to irrigate crops or rice fields.

ESTIMASI ANGKUTAN SEDIMEN MELAYANG DAN KUALITAS AIR SUNGAI DI KAWASAN EKOSISTEM PENTING LAHAN BASAH MASANGAT SUWI KALIMANTAN TIMUR As, Muli Edwin; Murtinah, Veronika; Bang, Falentino Usat; Sulistyorini, Iin Sumbada; Kusneti, Monica; Isa, Nur Linda
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 1 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.1.7

The Important Ecosystem Area of Mesangat Suwi Wetlands has a total area of around 14,722.69 ha located in East Kutai Regency, East Kalimantan. These wetlands have a strategic role as a regulators of the upstream water system, a source of freshwater fisheries, and a habitat for important protected animals. This study aimed to determine the rate of suspended sediment transport and river water quality. The study was conducted in two stages, the first was data and sample collection in the field, and the second was laboratory testing. The results of the study showed that the river water discharge and TSS in the Suwi and Masangat Rivers at the study location were directly proportional to the height of suspended sediment. The total average of suspended sediment in Suwi was smaller, it's 0.79 tons/year compared to Masangat at 2.64 tons/year. suspended sediment grains could settle and become bottom sediment. The rate of sedimentation in the river would accelerate the shallowing process which affected the wetlands ecosystem. The reduction in vegetated or forested areas in the Masangat wetlands was due to high human activity compared to Suwi. Currently, the water quality in the study areas, including COD, BOD, TDS, and TSS, is generally still below the standard quality threshold and is categorized as class two, namely water that can be used for freshwater fish farming, recreational facilities, livestock farming, and can be used to irrigate crops or rice fields.

Assessment of Soil Respiration Under Different Land Use in East Kutai, Indonesia Komara, Liris Lis; Sulastri, Eka; Murtinah, Veronika; Sasmita, Nanang
Agro Bali : Agricultural Journal Vol 8, No 1 (2025)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v8i1.2022

Forest areas are where the most advanced water and air cycles occur and cannot be replaced by any man-made products. For this reason, Indonesians' lives and forest lands are inextricably linked as economic resources. Deforestation also occurs at a considerable rate in East Kutai Regency. Changes in the area of forest land, which is continuously decreasing, followed by a growth in land area for other uses, including mining and plantations, serve as examples of this circumstance. To determine whether the conversion of this area is genuinely balanced between measures to protect the environment and the health of the soil and its economic value, more research must be done. One way to find out is to examine soil respiration in several locations. The purpose of the research was to compare soil respiration levels in three types of land cover in East Kutai Regency. The data collection method involves taking 0 – 30 cm depth of soil sample at three points in three locations, namely Rubber plantation, Teak plantation and Botanical Gardens. The total soil microorganism count is determined by soil organic carbon. The overall number of soil microorganisms increases with soil organic matter. Next, the soil samples are tested in the laboratory for colony total number. The study's findings indicated that the teak plantation had the lowest soil respiration, at21.37±0.9, and the Botanical Garden location had the highest, at29.87±1.91. The high total number of soil microorganisms makes respiration high because it produces high CO2, which is caused by the high activity of the microorganisms in the soil.

Dampak Kebakaran Hutan Terhadap Sifat Fisik dan Kimia Tanah di Taman Nasional Kutai, Kalimantan Timur Murtinah, Veronika; Edwin, Muli; Bane, Oktavina
Jurnal Pertanian Terpadu Vol 5 No 2 (2017): Jurnal Pertanian Terpadu Jilid V No 2 Desember 2017
Publisher : Sekolah Tinggi Pertanian Kutai Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36084/jpt..v5i2.133

Kebakaran hutan berdampak terhadap sifat fisika, kimia tanah, biologi tanah, erosi, kapasitas menyimpan air tanah, penghilangan serasah serta humus. Tujuan penelitian ini adalah untuk mengetahui dampak kebakaran hutan terhadap sifat fisik dan sifat kimia di Prevab, Taman Nasional Kutai. Tujuan penelitian didekati dengan membandingkan areal bekas terbakar dan areal tidak terbakar. Pengujian sampel tanah dilakukan di laboratorium, selanjutnya dilakukan analisis data dengan mengacu pada kriteria penilaian sifat fisik dan kimia tanah yang telah ditetapkan. Berdasarkan penelitian ini diperoleh hasil bahwa sampai 19 tahun setelah terbakar, diketahui kebakaran hutan berdampak terhadap sifat fisik tanah, yaitu meningkatnya kerapatan lindak/Bulk Density, penurunan porositas dan permeabilitas tanah serta tekstur tanah dengan fraksi pasir lebih dominan. Sifat kimia tanah memiliki kriteria yang sama antara areal bekas terbakar dan tidak terbakar yaitu pH sangat masam, DHL sangat rendah dan KTK rendah, sedangkan untuk kation-kation basa secara umum lebih tinggi pada areal tidak terbakar dibandingkan dengan areal terbakar, kecuali untuk Kalium (K).

Morfologi Tanah Tegakan Jati di Kecamatan Sangatta Utara, Kabupaten Kutai Timur Murtinah, Veronika; Putra, Mufti Perwira
Jurnal Pertanian Terpadu Vol 12 No 1 (2024): Jurnal Pertanian Terpadu Jilid XII Nomor 1 Juni 2024
Publisher : Sekolah Tinggi Pertanian Kutai Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36084/jpt..v12i1.541

Dalam budidaya tanaman kehutanan, tanah merupakan media pertumbuhan tanaman yang utama. Berbagai tipe penggunaan lahan (tanah) dapat mempengaruhi sifat-sifat tanah, antara lain sifat morfologi dan fisik tanah. Tujuan Penelitian untuk mengetahui perkembangan morfologi tanah pada tegakan jati, yang diharapkan dapat mendukung upaya keberlanjutan pengelolaan tanah dan tegakan. Dengan membuat profil tanah, maka pengamatan dan identifikasi sifat morfologi tanah dapat dilakukan. Hasil penelitian menunjukkan bahwa tanah memiliki kedalaman yang dalam, batas horizon berombak dengan peralihan horizon baur; warna tanah semakin terang dan perakaran tanaman semakin berkurang dengan bertambahnya kedalaman tanah; bercak tanah dijumpai pada horizon 3 dan 4; tingkat kemantapan struktur dan konsistensi tanah semakin meningkat dengan bertambahnya kedalaman tanah. Penelitian serupa dapat dilakukan pada jenis tanah dan tutupan lahan yang berbeda, secara berkala dan sifat-sifat tanah yang lain (fisik, kimia dan biologi).

Litterfall Production and Decomposition in a Mined Area Revetetated with Cassia siamea Komara, Liris Lis; Murtinah, Veronika; Anggraini, Dian; Risma
Indonesian Journal of Sustainable Agriculture and Environmental Sciences (IJSAES) Vol. 1 No. 1 (2025): Indonesian Journal of Sustainable Agriculture and Environmental Sciences (IJSAE
Publisher : CV. Truly Science Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar

Background: Soil nutrients in ex-coal mining land are very low, therefore it needs to be restored by restoring the nutrient cycle through litter productivity and decomposition. Aim: This study was conducted to determine the litter production and decomposition rates of Cassia siamea and nutrient return on the reclaimed land of PT. Kaltim Prima Coal. Methods: Litter production data were collected using litter traps for 6 months and for decomposition rates using litter bags for 3 months. The contents of C, N, C/N, P, K, cellulose hemicellulose and lignin were taken from the litter. Results: The results showed that there was a positive correlation between waste production and temperature and wind speed and a negative correlation between waste production and rainfall and humidity. Nitrogen and phosphorus content were positively correlated with reclamation age. Litterfall contributes nutrients to the soil in the following order C>N>K>P. Cassia siamea litter has an average decomposition rate of 0.073611 kg m-2 yr-1 or 0.736114 tons ha-1 yr-1. The very large decomposition rate in the first two weeks was because at the beginning of decomposition the decomposed part of the litterfall contained high levels of water and nitrogen which could increase the decomposition rate. Conclusion: The rate of litterfall production increases with the age of reclamation. There is a positive correlation between litterfall production and temperature and wind speed. There is a negative correlation between litterfall production and rainfall and humidity.

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