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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Journal of Tropical Soils Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Jurnal Tanaman Industri dan Penyegar JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management MAJALAH ILMIAH GLOBE SAINS TANAH - Journal of Soil Science and Agroclimatology Caraka Tani: Journal of Sustainable Agriculture Jurnal Penelitian Kelapa Sawit Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Entomologi Indonesia Jurnal Tanah dan Iklim BIOVALENTIA: Biological Research Journal
Gunawan Djajakirana
Departemen Ilmu Tanah Dan Sumber Daya Lahan, Fakultas Pertanian, IPB University, Kampus IPB Darmaga Bogor 16680
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Medicine & Pharmacology

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Journal : Journal of Tropical Soils

 1 
The Diversity and Abundance of Springtail (Collembola) on Forests and Smallholder in Jambi Widrializa, .; Widyastuti, Rahayu; Santosa, Dwi Andreas; Djajakirana, Gunawan
JOURNAL OF TROPICAL SOILS Vol 20, No 3: September 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i3.173-180

Abstract

Harapan forests is the first restoration forest in Indonesia, includes several different ecosystems. Different ecosystems have different characteristic to affect the diversity and abundance of Collembola. In the ecosystem, Collembola have an important role in biocontrol, decomposition, soil nutrient distribution, stimulation of soil microbial activity and as an alternative feed for predators. This study was aimed to investigate the diversity and abundance of Collembola in four ecosystems at Harapan forest, i.e. secondary forest, rubber forest, rubber smallholder and oil palm smallholder. To achieve the objective, soil samples were taken at 48 observation points in the four ecosystem. The soil samples were then extracted by Kempson Extractor. The diversity and abundance of Collembola in four ecosystems were categorized as medium to high. The total of individual and population of Collembola in the secondary and rubber forest ecosystems were likely to be higher than in the rubber and oil palm smallholders. This study had also identified four orders, 14 families and 31 genera of Collembola, where Isotomiella and Proisotoma dominated the genus of Collembola in the four ecosystems. [How to Cite: Widrializa, R Widyastuti, DA Santosa and G Djajakirana. 2015. The Diversity and Abundance of Springtail (Collembola) on Forests and Smallholder in Jambi. J Trop Soils 20: 173-180. Doi: 10.5400/jts.2015.20.3.173] 
Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating Handayani, Lili; Djajakirana, Gunawan; Darmawan, .; Munoz, Canecio Peralta
JOURNAL OF TROPICAL SOILS Vol. 20 No. 1: January 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i1.37-45

Abstract

The low-efficiency problem in fertilizer application can be overcome by controlling fertilizer solubility, i.e. by rendering the fertilizer to be released gradually; such material is also known as slow-release fertilizer (SRF). This research was aimed to formulate SRF by coating technique using acrylic and chitosan as the coating material, and to evaluate fertilizer resistance to too fast disintegration, and rate of nutrient release method. The results demonstrated that fertilizer formulation containing N, P, K, Fe, Cu, and Zn with granulation technique yielded 74% of granules with 2-5 mm in diameter. The SRFs (formulated fertilizer with acrylic or chitosan coating) were more resistant to water pounding than non-SRF. Furthermore, shaking test with distilled water or 2% citric acid, or by percolation test with distilled water showed that the SRFs had lower nutrient solubility than the non-SRFs. The results of shaking test also specifically indicated that coating with acrylic made the fertilizer more resistant to the citric acid,suggesting that this coating material would be more suitable in acidic soils. The SRFs formulated with the addition of chitosan during blending of micronutrients prior to mixing with macronutrients, granulation, and final coating exhibited lower nutrient solubility than the SRFs without the pre-coating chitosan addition. [How to Cite: Lili H, G Djajakirana, Darmawan, and CP Munoz. 2015. Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating. J Trop Soils 19: 37-45. Doi: 10.5400/jts.2015.20.1.37][Permalink/DOI: www.dx.doi.org/10.5400/jts.2015.20.1.37]
The Diversity and Abundance of Springtail (Collembola) on Forests and Smallholder in Jambi Widrializa, .; Widyastuti, Rahayu; Santosa, Dwi Andreas; Djajakirana, Gunawan
JOURNAL OF TROPICAL SOILS Vol. 20 No. 3: September 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i3.173-180

Abstract

Harapan forests is the first restoration forest in Indonesia, includes several different ecosystems. Different ecosystems have different characteristic to affect the diversity and abundance of Collembola. In the ecosystem, Collembola have an important role in biocontrol, decomposition, soil nutrient distribution, stimulation of soil microbial activity and as an alternative feed for predators. This study was aimed to investigate the diversity and abundance of Collembola in four ecosystems at Harapan forest, i.e. secondary forest, rubber forest, rubber smallholder and oil palm smallholder. To achieve the objective, soil samples were taken at 48 observation points in the four ecosystem. The soil samples were then extracted by Kempson Extractor. The diversity and abundance of Collembola in four ecosystems were categorized as medium to high. The total of individual and population of Collembola in the secondary and rubber forest ecosystems were likely to be higher than in the rubber and oil palm smallholders. This study had also identified four orders, 14 families and 31 genera of Collembola, where Isotomiella and Proisotoma dominated the genus of Collembola in the four ecosystems. [How to Cite: Widrializa, R Widyastuti, DA Santosa and G Djajakirana. 2015. The Diversity and Abundance of Springtail (Collembola) on Forests and Smallholder in Jambi. J Trop Soils 20: 173-180. Doi: 10.5400/jts.2015.20.3.173] 
Co-Authors , Suprihati . DARMAWAN . Suwardi . Suwardi Amanda Kusuma Dewi Atang Sutandi Basuki Sumawinata Darmawan Darmawan Darmawan Darmawan Darmawan Dewi, Tirta Kumala Dhanti Hanifa Muslimah DWI ANDREAS SANTOSA Edwin Aprianda Eko Mapilata, Eko Erwinda Erwinda Gunawan Sutio Gusti Z. Anshari Iman Rusmana Indri Hapsari Fitriyani Indriyani, Yohanna Anisa Indriyati, Lilik Tri Iskandar ISKANDAR Iskandar Iskandar Iswandi Anas Iswandi Anas Komarsa Gandasasmita Kurnia Dewi Sasmita Laksono Trisnantoro Lili Handayani, Lili Munoz, Canecio Peralta Nourma Al Viandari Nur Izza Faiqotul Himmah Nuriman, Muhammad Nurul Faoziah Oktariani, Putri Putri Handayani Sijabat Qonita Qurrota A’yun RAHAYU WIDYASTUTI Riki Ruhimat Sarjiya Antonius Sarjiya Antonius Septiana, Liska Mutiara Simbolon, David Ricardo Siti Nurzakiah Siti Nurzakiah Sudirman Yahya Supiandi Sabiham Suryawijaya, Putu Kevin Syaiful Anwar Taufiq Hidayat Untung Sudadi Widrializa, . Yayuk Rahayuningsih Suhardjono Yohanna Anisa Indriyani