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ENHANCING THE PRODUCTIVITY OF DEGRADED LAND THROUGH SOIL AND WATER CONSERVATION TECHNIQUE IN CARITA RESEARCH FOREST, WEST JAVA

Indonesian Journal of Forestry Research Vol 9, No 2 (2012): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Original Source | Check in Google Scholar | Full PDF (129.461 KB)

Abstract

Encroachments on Carita Research Forest area have exacerbated the degradation of land due to uncontrolled runoff, erosion and nutrient losses especially on the sloping land with high annual rainfall. To reduce the severity of the degradation the area should be rehabilitated by applying soil and water conservation techniques. The techniques used were the vegetative methods (culture), and a combination of it with mechanical/technical methods. The combination method is expected to be more effective in controlling runoff, erosion and nutrient losses. One important parameter is the efficiency of the distance of the vertical mulch channel, which affects the application cost. This study was aimed to determine the effect of different distances of vertical mulch channels on the plant growth and annual crop yield as well as its effectiveness in controlling runoff, erosion and nutrient losses. The research was conducted in Carita Research Forest from 2005 to 2008, using the randomized block design. Treatments applied were: vertical mulch with six and twelve meter distances of plots of khaya (Khaya anthotheca C.Dc.) and corn ( Zea mays L.) cropping system. Observations included height and diameter growth of khaya, runoff and erosion, and cost per ha. The results showed that six meter of vertical mulch was the most efficient distance. The height and diameter of khaya tree increased by 7% and 31% in six meter distance compared to the control. Moreover, runoff and erosion was reduced by 75% and 37%, and nutrient losses could be trimmed down by three to five times. In addition, six meters distance could also produce corn of 712 kg/ha/year, which was 73% greater than corn production without vertical mulch. On the other hand, the cropping system with six meter distance of vertical mulch required Rp 3,250,000,- per ha, which was Rp 250,000,- more expensive than that without vertical mulch.

FEASIBILITY STUDY OF BUSINESS IN AGARWOOD INOCULATION AT DIFFERENT STEM DIAMETERS AND INOCULATION PERIODS

Indonesian Journal of Forestry Research Vol 8, No 2 (2011): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Original Source | Check in Google Scholar | Full PDF (111.064 KB)

Abstract

Indonesia signifies as the biggest agarwood producer country in the world. Its demand and price tend to increase and have brought about over exploitation of agarwood. Consequently, its population in nature has decreased significantly. To overcome the situation, since 1995, agarwood has been included in the CITES Appendix II. However, illegal exploitation remains persistent and reaches an excessive level. In order to deal with it, agarwood cultivation and its artificial production have been undertaken at several provinces in Indonesia. Some supporting factors for agarwood cultivation and artificial production are the availability of potential land for extensive cultivation, appropriate agro climate condition, simple cultivation technique and already being well adopted by farmers, the availability of necessary pathogen for agarwood inoculation, and the increasing demand with relatively high price. The research aims to analyze the feasibility study of agarwood inoculation business at several stem diameters (15 - 25 cm; 26 -35 cm and 36 - 40 cm) and periods of inoculation (1 - 5 years). Data were collected through field observation and literature study. The results showed that inoculation on agarwood producer tree stands at 12.5% interest rate afforded positive net present value (NPV),  internal rate of return (IRR) is much higher than market interest and benefit cost (B/C) ratio >2 for those three diameter classes. Furthermore, if agarwood harvesting is delayed until five years after inoculation, NPV,  IRR and B/C ratio would be much higher. It can be concluded that inoculation on agarwood producer tree stands (at appropriate age for inoculation) is feasible to be developed.

KUANTIFIKASI KUALITAS TEMPAT TUMBUH DAN PRODUKTIVITAS TEGAKAN UNTUK HUTAN TANAMAN EUKALIPTUS DI KABUPATEN SIMALUNGUN, SUMATERA UTARA

Jurnal Penelitian Hutan Tanaman Vol 9, No 2 (2012): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Peningkatan Produktivitas Hutan

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Abstract

ENHANCING THE PRODUCTIVITY OF DEGRADED LAND THROUGH SOIL AND WATER CONSERVATION TECHNIQUE IN CARITA RESEARCH FOREST, WEST JAVA

Indonesian Journal of Forestry Research Vol 9, No 2 (2012): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Original Source | Check in Google Scholar | Full PDF (129.461 KB)

Abstract

Encroachments on Carita Research Forest area have exacerbated the degradation of land due to uncontrolled runoff, erosion and nutrient losses especially on the sloping land with high annual rainfall. To reduce the severity of the degradation the area should be rehabilitated by applying soil and water conservation techniques. The techniques used were the vegetative methods (culture), and a combination of it with mechanical/technical methods. The combination method is expected to be more effective in controlling runoff, erosion and nutrient losses. One important parameter is the efficiency of the distance of the vertical mulch channel, which affects the application cost. This study was aimed to determine the effect of different distances of vertical mulch channels on the plant growth and annual crop yield as well as its effectiveness in controlling runoff, erosion and nutrient losses. The research was conducted in Carita Research Forest from 2005 to 2008, using the randomized block design. Treatments applied were: vertical mulch with six and twelve meter distances of plots of khaya (Khaya anthotheca C.Dc.) and corn ( Zea mays L.) cropping system. Observations included height and diameter growth of khaya, runoff and erosion, and cost per ha. The results showed that six meter of vertical mulch was the most efficient distance. The height and diameter of khaya tree increased by 7% and 31% in six meter distance compared to the control. Moreover, runoff and erosion was reduced by 75% and 37%, and nutrient losses could be trimmed down by three to five times. In addition, six meters distance could also produce corn of 712 kg/ha/year, which was 73% greater than corn production without vertical mulch. On the other hand, the cropping system with six meter distance of vertical mulch required Rp 3,250,000,- per ha, which was Rp 250,000,- more expensive than that without vertical mulch.

KESESUAIAN JENIS POHON PADA LAHAN KRITIS DI SUB DAS LESTI, JAWA TIMUR

Jurnal Penelitian Hutan dan Konservasi Alam Vol 11, No 2 (2014): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

Keberhasilan penanaman pohon khususnya di lahan-lahan kritis, sangat ditentukan oleh berbagai faktor,seperti pemilihan jenis-jenis yang sesuai dengan kondisi biofisik daerah yang bersangkutan, tujuan usaha, cara penyiapan lahan dan sebagainya. Tujuan penelitian ini adalah memperoleh data dan informasi tentang jenis-jenis pohon yang sesuai untuk lahan-lahan kritis di Sub DAS Lesti, Jawa Timur. Informasi ini dituangkan dalam peta kesesuaian tempat tumbuh jenis pohon yang diperoleh dengan mencocokkaninformasi persyaratan tempat tumbuh suatu jenis pohon terhadap peta kondisi tanah, topografi, iklim (curah hujan) dan peta tingkat kekritisan lahannya. Peta kesesuaian ini diharapkan dapat dipakai sebagai landasanuntuk menyusun perencanaan rehabilitasi lahan di Sub DAS Lesti berdasarkan prioritas tingkat kekritisannya.

ENHANCING THE PRODUCTIVITY OF DEGRADED LAND THROUGH SOIL AND WATER CONSERVATION TECHNIQUE IN CARITA RESEARCH FOREST, WEST JAVA

Indonesian Journal of Forestry Research Vol 9, No 2 (2012): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Original Source | Check in Google Scholar | Full PDF (129.461 KB)

Abstract

Encroachments on Carita Research Forest area have exacerbated the degradation of land due to uncontrolled runoff, erosion and nutrient losses especially on the sloping land with high annual rainfall. To reduce the severity of the degradation the area should be rehabilitated by applying soil and water conservation techniques. The techniques used were the vegetative methods (culture), and a combination of it with mechanical/technical methods. The combination method is expected to be more effective in controlling runoff, erosion and nutrient losses. One important parameter is the efficiency of the distance of the vertical mulch channel, which affects the application cost. This study was aimed to determine the effect of different distances of vertical mulch channels on the plant growth and annual crop yield as well as its effectiveness in controlling runoff, erosion and nutrient losses. The research was conducted in Carita Research Forest from 2005 to 2008, using the randomized block design. Treatments applied were: vertical mulch with six and twelve meter distances of plots of khaya (Khaya anthotheca C.Dc.) and corn ( Zea mays L.) cropping system. Observations included height and diameter growth of khaya, runoff and erosion, and cost per ha. The results showed that six meter of vertical mulch was the most efficient distance. The height and diameter of khaya tree increased by 7% and 31% in six meter distance compared to the control. Moreover, runoff and erosion was reduced by 75% and 37%, and nutrient losses could be trimmed down by three to five times. In addition, six meters distance could also produce corn of 712 kg/ha/year, which was 73% greater than corn production without vertical mulch. On the other hand, the cropping system with six meter distance of vertical mulch required Rp 3,250,000,- per ha, which was Rp 250,000,- more expensive than that without vertical mulch.

FEASIBILITY STUDY OF BUSINESS IN AGARWOOD INOCULATION AT DIFFERENT STEM DIAMETERS AND INOCULATION PERIODS

Indonesian Journal of Forestry Research Vol 8, No 2 (2011): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Original Source | Check in Google Scholar | Full PDF (111.064 KB)

Abstract

Indonesia signifies as the biggest agarwood producer country in the world. Its demand and price tend to increase and have brought about over exploitation of agarwood. Consequently, its population in nature has decreased significantly. To overcome the situation, since 1995, agarwood has been included in the CITES Appendix II. However, illegal exploitation remains persistent and reaches an excessive level. In order to deal with it, agarwood cultivation and its artificial production have been undertaken at several provinces in Indonesia. Some supporting factors for agarwood cultivation and artificial production are the availability of potential land for extensive cultivation, appropriate agro climate condition, simple cultivation technique and already being well adopted by farmers, the availability of necessary pathogen for agarwood inoculation, and the increasing demand with relatively high price. The research aims to analyze the feasibility study of agarwood inoculation business at several stem diameters (15 - 25 cm; 26 -35 cm and 36 - 40 cm) and periods of inoculation (1 - 5 years). Data were collected through field observation and literature study. The results showed that inoculation on agarwood producer tree stands at 12.5% interest rate afforded positive net present value (NPV),  internal rate of return (IRR) is much higher than market interest and benefit cost (B/C) ratio >2 for those three diameter classes. Furthermore, if agarwood harvesting is delayed until five years after inoculation, NPV,  IRR and B/C ratio would be much higher. It can be concluded that inoculation on agarwood producer tree stands (at appropriate age for inoculation) is feasible to be developed.

KESESUAIAN TEMPAT TUMBUH JENIS-JENIS POHON DI DAS PEMALI JRATUN, JAWA TENGAH

Jurnal Penelitian Hutan dan Konservasi Alam Vol 9, No 4 (2012): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

ABSTRAKRehabilitasi hutan dan lahan mutlak diperlukan untuk memperbaiki kondisi lingkungan. Sampai dengan saat ini keberhasilan rehabilitasi hutan dan lahan masih sangat rendah. Untuk meningkatkan keberhasilan rehabilitasi, diperlukan upaya yang seksama dalam pemilihan jenis pohon yang akan dikembangkan termasuk kesesuaian tempat tumbuhnya. Salah satu pendekatan untuk mengetahui  kesesuaian tempat tumbuh suatu jenis pohon  adalah dengan melakukan kajian mengenai jenis-jenis pohon potensial dan bernilai ekonomis di suatu tempat, yang ditunjang dengan data persebaran jenis pohon pada lahan yang sesuai dengan persyaratan tempat tumbuhnya. Jenis-jenis pohon yang bernilai ekonomis tersebut dituangkan dalam peta kesesuaian tempat tumbuh yang terdigitasi. Tujuan penelitian ini adalah menyediakan peta kesesuaian tempat tumbuh jenis-jenis pohon di Daerah Aliran Sungai (DAS) Pemali Jratun, Jawa Tengah. Peta kesesuaian tempat tumbuh jenis pohon    tersebut diperoleh dengan meng-overlay-kan semua informasi persyaratan tempat tumbuh jenis pohon yang bersangkutan, antara lain : peta tanah, peta topografi, dan peta iklim (curah hujan). Informasi ini diharapkan dapat dipakai sebagai landasan untuk menyusun kebijakan dan strategi  rehabilitasi DAS Pemali Jratun terutama di sub DAS yang sangat kritis. 

POTENSI PENGEMBANGAN MAMAR SEBAGAI MODEL HUTAN RAKYAT DALAM REHABILITASI LAHAN KRITIS DI TIMOR BARAT

Jurnal Penelitian Hutan dan Konservasi Alam Vol 5, No 5 (2008): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

ABSTRAK Pendekatan rehabilitasi lahan kritis di Timor Barat harus dilakukan secara holistik dengan memperhatikan aspek sosial ekonomi dan budaya masyarakat. Masalah yang dihadapi dalam upaya rehabilitasi hutan dan lahan antara lain: kemiskinan, keterbatasan alternatif lapangan kerja, serta tingkat ketergantungan yang tinggi terhadap pertanian lahan kering dan hewan ternak. Laju percepatan lahan kritis pada beberapa DAS  seperti DAS Benain Noelmina di Timor Barat sangat tinggi. Dengan demikian, pendekatan rehabilitasi lahan di Timor Barat harus dilakukan secara terpadu dan lebih spesifik dengan mengintegrasikan berbagai komponen yang saling mempengaruhi. Penelitian ini bertujuan memperoleh informasi mengenai alternatif rehabilitasi lahan melalui pengembangan hutan rakyat berbasis mamar. Metode pendekatan yang digunakan adalah observasi langsung terhadap  karakteristik mamar,  wawancara, dan  pengumpulan data  sekunder.    Hasil penelitian menunjukkan bahwa sistem mamar berpeluang dikembangkan sebagai model hutan rakyat untuk mendukung rehabilitasi lahan. Keuntungan pengembangan mamar adalah diperolehnya dasar pengelolaan lahan kritis dengan menggunakan inisiatif lokal yang sesuai dengan karakteristik wilayah, sosial budaya dan kearifan lokal masyarakat, sehingga akan dapat meningkatkan partisipasi masyarakat dalam pencapaian tujuan rehabilitasi hutan dan lahan.

SIFAT FISIK DAN KIMIA TANAH SERTA KOMPOSISI VEGETASI DI TAMAN WISATA ALAM TANGKUBAN PARAHU, PROVINSI JAWA BARAT

Jurnal Penelitian Hutan dan Konservasi Alam Vol 4, No 5 (2007): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

ABSTRAK Taman Wisata Alam Tangkuban Parahu merupakan salah satu taman wisata alam yang memiliki kekhasan berupa kawah Gunung Tangkuban Parahu dengan tipe vegetasi hutan dataran tinggi, sehingga dalam suatu kesatuan sebagai panorama yang khas. Panorama yang khas ini memiliki daya tarik yang tinggi, sehingga taman wisata alam ini banyak dikunjungi oleh wisatawan, baik asing maupun dalam negeri.  Tipe vegetasi yang ada merupakan hasil interaksi dari komponen-komponen yang ada di dalam ekosistem tersebut. Salah satu komponen ekosistem adalah tanah.  Sifat-sifat tanah erat hubungannya dengan komposisi vegetasi yang ada di atasnya. Sehubungan dengan hal tersebut di atas, maka penelitian ini bertujuan untuk mendapatkan informasi tentang sifat-sifat tanah dan komposisi vegetasi yang ada di Taman Wisata Alam Tangkuban Parahu. Penelitian dilakukan dengan membuat plot-plot penelitian untuk pengamatan sifat-sifat tanah dan topografi, serta vegetasi. Hasil penelitian menunjukkan bahwa tanah di lokasi penelitian termasuk jenis tanah Andosol, dengan tipe vegetasi khas daerah pegunungan.