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Reforestation Achievement Monitoring at Mining Area through Soil Index Model Nining Puspaningsih; Kukuh Murtilaksono; Naik Sinukaban; I Nengah Surati Jaya; Yadi Setiadi
Jurnal Manajemen Hutan Tropika Vol. 16 No. 2 (2010)
Publisher : Institut Pertanian Bogor (IPB University)

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The achievement of the reforestation is expected to reach a climax forest ecosystem. The objectives of this studywas to develop soil index model on monitoring of reforestation achievement. The study used a statistical approach to obtain soil index model to determine the achievement level of reforestation in mining area. The achievement indices for each variable were derived from the best regression model developed, while the weights of eachvariable were computed based on magnitude of regression coefficient for each indicator. The level of reforestationachievement index was initially developed by the use of 4 indicators, i.e. physical soil, biological soil, chemical soil, and litter index. Of those indicators, the study revealed that the heights weight for reforestation monitoring was chemical soil, which is composed pH, cation exchange capacity (CEC), macro-micro nutrient, and base saturation.

Dampak Perambahan Hutan Taman Nasional Lore Lindu Terhadap Fungsi Hidrologi Dan Beban Erosi (Studi Kasus Daerah Aliran Sungai Nopu Hulu, Sulawesi Tengah) Yayat Hidayat; Naik Sinukaban; Hidayat Pawitan; Suria Darma Tarigan
Jurnal Ilmu Pertanian Indonesia Vol. 12 No. 2 (2007): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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The research was proposed to identify rainforest conversion impact on hydrologic function and soil erosion, and its simulation using ANSWERS model. Surface runoff and soil erosion were measured in soil erosion plots and outlet of Nopu Upper Catchment. Rainforest conversion to agricultural lands were significantly increased soil erosions and surface runoffs. Soil erosion from maize and peanut rotation was higher 2061.8% than natural forest. It higher value also in intercroping young age cocoa, maize and cassava and maize were 2023.8% and 2012.3% respectively. While surface runoffs increased up to 761.7°/o on bare plot, 567.5% on medium age cocoa, 446.8°/o on young age cocoa, 415.1°/o on intercroping young age cacao, maize and cassavas, 405.9°/o on old cocoa, and 329.5% on intercroping young age cacao and cassavas. Crop and management factor (C factor) value is significantly corelated with outputs of ANSWERS model. Using daily daily C factors, the ANSWERS model performs well in predicting soil erosion which is showed by determination coefficent (Jr = 0.89), model efficiency (0.86), and average of percentage model deviations (24.1%). Whereas using USlE C factor, model accuracy lower which represented by model coefficient (0.40) and average of percentage model deviations (63.6%). Using daily C factors, ANSWERS model simulation indicates rainforest conversion into agricultural lands on Nopu Upper Catchment has caused soil and water loss 3190.5 ton/year and 115441.0 m3/year, respectively. Agroforestry system practices in agricultural lands which in line with reforestation in stream line and steep agricultural areas (slope> 40°/o) was effective to reduce soil erosions up to 77.6°/o.

Pengaruh Penggunaan Mulsa Dan Pengolahan Tanah Terhadap Aliran Permukaan, Erosi Dan Selektivitas Erosi Pada Latosol Coklat Kemerahan Darmaga Naik Sinukaban; . Sudarmo; Kukuh Murtilaksono
Jurnal Ilmu Pertanian Indonesia Vol. 1 No. 1 (1991): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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The purpose of this study is to evaluate the effects of conservation and straw mulch applications on runoff, erosion, selectivity in a cropping pattern of groundnuts - filed corn. Tillage systems used were zero tillage and minimum tillage, while straw mulch application used were 0, 30, 60, and 90 percent coverage on Reddish Brown Latosol, Darmaga. This study was carried out in the planting season of 1088/1989 (November 1988 to 1989). Groundnuts (Pelanduk variety) was planted immediately after land preparation, just before the straw mulches were applied. Field corn (Arjuna variety) was planted right after the harvesting of groundnuts. Runoff and soil loss were recorded and some samples were collected for laboratory analysis. The data analysis shows that runoff were significantly decreased by the minimum tillage system and soil loss were significantly decreased by the increasing straw mulch application with a linier relationship. Straw mulch coverage of at least 60 percent reduced the soil loss by more than 50 percent. However, the increasing straw mulch applications were not significantly effective to reduce plant nutrient loss. This is due to the increasing selectivity of erosion process by the increasing straw mulch application.

Karakterisasi Hidrologi dan Daur Limpasan Permukaan Daerah Aliran Sungai Ciliwung Hidayat Pawitan; Naik Sinukaban
Jurnal Ilmu Pertanian Indonesia Vol. 1 No. 1 (1991): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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This research was done following the general water balance equation Pg - E* = R in three stages: preliminary, hydrometeorology, and runoff analyses. Measurements of infiltrations were conducted on the upper Ciliwung basin at different land units and cumulative basin infiltration was computed, and erosion was predicted using the USLE method. From the hydrometeorology analysis it was concluded that variations of the point rainfall was diminishing in the downstream-to-upstream direction, however the opposite was true for the spatial distribution. Heavy rainfalls occurred at an average of five events in January and 0,2 events in July. The Average intensity varied between 8 mm and 20 mm/hr, and rainfall durations varied between 3 to 5 hours. Prediction of annual cumulative infiltration yielded 70 to 74 percent of total rainfall, and erosions exceeding the threshold levels of 20 to 43 ton/ha/yr only occurred in the uplands, shrubs, and plantations which are about 50 percent of the upper basin areal. Basin runoffs showed excessive ratios in many instances and at all time scales: hourly, daily, and monthly, ranging between 10 to 100 percent of total rainfall. It is considered due to contributions from groundwater sources which might not be limited to the basin boundaries. Time of concentrations also varied widely, i.e. 0.4 to 3.3 hours for upper, 0.9 to 7.1 hours fo middle, and 1.6 to 15.5 hours for lower outlets.

ANALISIS SISTEM KELEMBAGAAN DALAM PERENCANAAN DAN STRATEGI PENGELOLAAN LAHAN KRITIS DAS BILA Andi Nuddin; Naik Sinukaban; Kukuh Murtilaksono; Hadi S. Alikodra
Jurnal Penyuluhan Vol. 3 No. 2 (2007): Jurnal Penyuluhan
Publisher : Department of Communication and Community Development Sciences and PAPPI (Perhimpunan Ahli Penyuluh Pertanian Indonesia)

The rehabilitation program of critical land had been done since 1985 until 2001, but Bila watershed condition did not get better, even the width of critical land and erotion got more increase. Those were caused by some factors, involved: unaccruracy of technology, limited baudget, and unoptimal institution. Analysis of this study was focused on institution factor. Some of institution aspects that caused failure of rehabilitation of critical land Bila watershed, were is: role of institution sector, performance of management function, weakness on coordination, unrelevant of strategic program, and priority activity. Data collected was conducted by survey on some samples. Interpretative Structural Modelling and Analitycal Hierarchy Process were applied and the result shown that: (1) The main subject in critical land Bila watershed management were institution at regency level, which is Bappeda and Bapedalda, (2) unsuccess of rehabilitation of critical land Bila watershed was caused by planning weakness, (3) top-down policy, one of nine from main factors must be handled for effectiveness of coordination function, (4) to equalize vision and mission Bila watershed management cross territory was one of foor priority strategic frogram in critical land Bila watershed management, (5) and to increase knowledge and farmer skills were one of seven priority activity in critical land Bila watershed management.

Land rehabilitation of post-mining must be done with reforestation. Reforestation success in post-mining revegetation should to refer the characteristics of natural forests. The success of the reforestation is expected to reach a climax forest ecosystem. How much time is needed to achieve the desired condition (success reforestation), in this case described as the age of achievement expectations of reforestation success to reach a climax forest ecosystem (the basalt area). The research is aim Nining Puspaningsih; Kukuh Murtilaksono; Naik Sinukaban; I Nengah Surati Jaya; Yadi Setiadi
Forum Pasca Sarjana Vol. 33 No. 4 (2010): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Land rehabilitation of post-mining must be done with reforestation. Reforestation success in post-mining revegetation should to refer the characteristics of natural forests. The success of the reforestation is expected to reach a climax forest ecosystem. How much time is needed to achieve the desired condition (success reforestation), in this case described as the age of achievement expectations of reforestation success to reach a climax forest ecosystem (the basalt area). The research is aimed to predict reforestation success age. The study used regression analysis for determining the reforestation success age in mining area. The measure used to determining the reforestation success age is basalt area (LBDS) of natural forests. Mathematically it can be summarized to LBDS = f (age). The study found the age of achievement expectations of reforestation success is 75 years. Over the 75 years when the efforts to improve, protect and enhance forest functions are be done well, consistently, and even continued to rise, certainly reforestation success will be achieved, or even faster. Key words: rehabilitation, mining area, reforestation, basalt area, reforestation success age

Sustainable agriculture development requires a high quality and proper land management in order to promote high farmer’s income and to prevent natural resources degradation. This research was conducted in Nopu sub-watershed, a sub sub Gumbasa watershed, Central Sulawesi Province. The erosion and surface run off were observed by placing erosion plots on various ages of cocoa land uses (monoculture and agroforestry), whiles the soil quality indicators were observed by analyzing the physical and c Anthon Monde; Naik Sinukaban; Kukuh Murtilaksono; Nora H. Pandjaitan
Forum Pasca Sarjana Vol. 31 No. 3 (2008): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Sustainable agriculture development requires a high quality and proper land management in order to promote high farmer’s income and to prevent natural resources degradation. This research was conducted in Nopu sub-watershed, a sub sub Gumbasa watershed, Central Sulawesi Province. The erosion and surface run off were observed by placing erosion plots on various ages of cocoa land uses (monoculture and agroforestry), whiles the soil quality indicators were observed by analyzing the physical and chemical properties of soil samples, which were collected from various ages of cocoa land use. The soil profile permeability and soil surface coverage were directly observed on the field. Production and farmer’s income of various cocoa land use systems in Nopu watershed were collected by using questioners. Sustainable management of cocoa (monoculture and agroforestry) was formulated by using various scenarios. Results of the study showed that 1) forest conversion into cocoa land use decreased soil quality degradation, tended to increase soil erosion and run off; 2) to establish a sustainable cocoa farming system in Nopu watershed, there should be practiced a proper and equilibrium fertilization, application of adequate soil and water conservation techniques such as mulching and construction of ditches closed (rorak) and ridges (sengkedan). Key words: cocoa, erosion, farmer’s income, forest conversion, soil quality

One major river flowing through Bekasi City is Bekasi river. Total extent of the Bekasi watershed is about 39.045 ha, in 2002 with rainfall of 250 mm for 8 hours caused about 138 ha flooded in residents area for 2-3 days in Bekasi City, more extremely in 2005 with rainfall only 127 mm for 6 hours caused about 164 ha flooded in residents area for 3 days. This evidence showed that flood problem in Bekasi City is become worse, and seem to be more horrifying in the future. Therefore, the flood pro Trihono Kadri; Naik Sinukaban; Hidayat Pawitan; Suria Darma Tarigan
Forum Pasca Sarjana Vol. 34 No. 1 (2011): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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One major river flowing through Bekasi City is Bekasi river. Total extent of the Bekasi watershed is about 39.045 ha, in 2002 with rainfall of 250 mm for 8 hours caused about 138 ha flooded in residents area for 2-3 days in Bekasi City, more extremely in 2005 with rainfall only 127 mm for 6 hours caused about 164 ha flooded in residents area for 3 days. This evidence showed that flood problem in Bekasi City is become worse, and seem to be more horrifying in the future. Therefore, the flood problem needs an extremely great attention. The objectives of the research is (1) analysis watershed condition; (2) analysis of the causes of flood over Bekasi City from the perpective of hydrology and hydraulic; (3) plan of Bekasi watershed management to reduce flood risk in Bekasi City. To obtain the purposes of this research, the method of analysis is devided into four main subjects: (1) analysis of watershed condition using SCS method; (2) hydrology analysis using hydrology modeling HEC-HMS; (3) river flow capacity using hydraulic modeling HEC-RAS and (4) plan of scenarios to reduce flood risk. There are four scenarios to overcome the flood problems: (1) similarly with government plan 2010;(2) managing Bekasi watershed area with conservation tillage; (3) build water retarded structure entire of watershed and;(4) combination of second and third scenarios. The research results shown that river flow capacity only 462 m3/s is not enough to flow the discharges, otherwise the land use is change and increasing the run off in upstream. Based on the problems, it is expected to overcome the flood problem by managing Bekasi watershed area with conservation tillage and build water retarded structure. It will reduce 28.58% of the discharge run off in 2020. Key words: flood, land use changing, watershed management

PERBAIKAN KUALITAS FISIK TANAH MENGGUNAKAN MULSA JERAMI PADI DAN PENGARUHNYA TERHADAP PRODUKSI KACANG TANAH Enni Dwi Wahyunie; Naik Sinukaban; Boanerges Silvanus Daerari Damanik
Jurnal Ilmu Tanah dan Lingkungan Vol 14 No 1 (2012): Jurnal Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Perbaikan kualitas fisik tanah untuk meningkatkan pertumbuhan kacang tanah dapat dilakukan dengan pemberian mulsa jerami padi. Tujuan dari penelitian ini adalah mempelajari pengaruh mulsa jerami padi terhadap sifat-sifat fisik tanah seperti bobot isi, jumlah dan distribusi pori, retensi air tanah, kapasitas infiltrasi, dan pertumbuhan serta produksi kacang tanah. Penelitian menggunakan rancangan acak lengkap dengan empat dosis pemberian mulsa yang diulang tiga kali sehingga terdapat 12 satuan percobaan. Perlakuan mulsa jerami padi dibagi ke dalam 4 taraf dosis yaitu M0 (tanpa mulsa), M1 (0.92 ton ha-1), M2 (1.84 ton ha-1), dan M3 (2.76 ton ha-1). Kacang tanah varietas Gajah di tanam dengan jarak 20 cm x 40 cm dengan satu butir per lubang tanam. Hasil penelitian menunjukkan bahwa penggunaan mulsa jerami padi hingga 2.76 ton ha-1 tidak berpengaruh nyata terhadap sifat-sifat fisik tanah seperti bobot isi, jumlah dan distribusi pori, serta retensi air tanah. Namun kapasitas infiltrasi nyata meningkat dengan pemberian mulsa 2.76 ton ha-1. Pemberian mulsa jerami padi hingga 2.76 ton ha-1 tidak nyata meningkatkan produksi kacang tanah.

APLIKASI PROGRAM ANALISIS CITYGREEN 5.4 UNTUK KAJIAN RUANG TERBUKA HIJAU (RTH) DAN MANFAAT LAYANAN TERUKUR EKOSISTEM KOTA BOGOR Indung Sitti Fatimah; Aris Munandar; Naik Sinukaban; - Kholil
EKOLOGIA Vol 11, No 1 (2011): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

Kualitas ekosistem kota dipengaruhi oleh ketersediaan kanopi pohon dalam RTH kota karena selain fungsi estetika dan visualnya, pohon mempunyai beberapa fungsi bio-ekologis yaitu modifikasi radiasi matahari, mengurangi kebisingan, penyaring dan penjerab polutan, pencegah erosi dan pengontrol laju limpasan permukan; serta fungsi sosial ekonomi dan budaya. Walaupun demikian besarnya manfaat lahan bervegetasi, namun keberadaannya sulit dipertahankan saat dihadapkan pada konflik kepentingan alih fungsi lahan, dikarenakan masih minimnya pemahaman masyarakat dan pihak pengelola kota dalam menterjemahkan nilai ekonomi RTH kota, serta keterbatasan alat analisis (tools) yang mampu menterjemahkan sejumlah nilai manfaat tersebut ke dalam bentuk angka-angka nominal (nilai ekonomi) yang lebih mudah dipahami oleh semua pihak. Sebuah organisasi Non Profit US Forest mempelopori pendekatan cost-benefit analysis ini dengan mengembangkan sebuah program analisis berbasis GIS untuk menghitung manfaat ekonomi hutan kota secara spasial, dengan menggunakan bantuan perangkat lunak software Arcview 3.2. ektensi CITYGreen 5.4. Aplikasi program ini dilakukan dalam serangkaian penelitian di wilayah administratif kota Bogor. Berdasarkan hasil analisis yang telah dilakukan, maka penggunaan program aplikasi CITYGreen ini dapat digunakan untuk menganalisis potensi RTH untuk 4 manfaat, yaitu: potensi penyimpanan dan penjerapan Carbon, potensi reduksi limpasan permukaan, konservasi energi, landcover breakdown dan pemodelan pertumbuhan pohon. Hasil analisis berupa peta landcover, dan analysis report yang menyajikan: site statistic, ecological benefits, dan economic benefit summary/nilai nominal manfaat ekosistem untuk 4 kategori tersebut, yang diharapkan dapat menjadi bahan pertimbangan penyusunan kebijakan strategis pengelolaan RTH kota.Kata kunci : CityGreen, RTH, Ekosistem kota

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