Penyebaran Jenis Puspa (Schima wallichii (DC.) Korth) di Resort Kawah Ratu, Taman Nasional Gunung Halimun Salak, Jawa Barat

Puspa (Schima wallichii (DC.) Korth.) is a type of plant that dominates the area of Gunung Halimun Salak National Park, especially at Kawah Ratu Resort. Puspa type is one of the upland plant species that can grow in critical land. The objective of this study is to identify the distribution pattern and the potential for regeneration of puspa species (Schima wallichii (DC.) Korth.) at Kawah Ratu Resort, Gunung Halimun Salak National Park, West Java. Data were collected by analyzing vegetation with a single plot method covering an area of 1 hectare at each location. The research was conducted in the Pamengpeuk Block and the Leles Block. The species found in the two research locations were 98 species. The results showed that the distribution pattern of puspa was clustered, both in the Pamengpeuk block and in the Leles block. A clustered spread indicates good youth growth. The ability of puspa regeneration in both locations was quite good because the number of puspa regeneration individuals was more than the individual trees. Keywords: distribution, Gunung Halimun Salak National Park, Kawah Ratu Resort,puspa, Schima wallichii

Peran Masyarakat dalam Pengendalian Kebakaran Hutan di BKPH Slarang KPH Pemalang

Forest fires are a form of forest disturbance that often occurs. Every year, forest fires in Indonesia occur during the dry season. The causes of forest fires in Indonesia are natural and human factors. Forest fires cause an enormous loss in properly controlling forest fires. This study aims to analyze the factors that cause forest fires and examine the efforts to control forest fires and the role of community participation in forest fire control at BKPH Slarang, KPH Pemalang, Central Java. The highest forest fires occurred in 2015 with a frequency of 4 times that the total area of land burned was 11,10 hectares. Forest fire in BKPH Slarang caused a loss of costing IDR 50,234,000. The form of control exercised by BKPH is socialization or counseling about fires. Direct socialization or counseling is given to the community in various activities. Community participation is very high in prevention and blackout activities at BKPH Slarang KPH Pemalang. Key words: BKPH Slarang, causative factors, community participation, control of forest fire

Optimalisasi Pemberian Pupuk Kandang Sapi dan Arang Kayu Terhadap Pertumbuhan Salam (Syzygium polyanthum (Wight) Walp.) pada Tanah Tercemar Oli Bekas

Illegal disposal of used oil causes soil contamination which can damage and reduce the soil productivity. Planting salam (Syzygium polyanthum) with the addition of cow manure and wood charcoal is expected to improve the characteristics of soil that was contaminated by used oil. This study analyzed the effect of giving cow fertilizer and wood charcoal on the growth of salam and determining the optimal dose to increase the growth of salam on contaminated soil by used oil. This study used a factorial completely randomized design (CRD) with two factors; that is cow manure and wood charcoal and using 60ml/kg of soil contaminated with used oil. This study shows that giving 90 gram of cow manure and 40 gram of wood charcoal gave the best response to total wet weight and root length. The application of 90 gram of cow manure and 20 gram of wood charcoal gave the best response to the diameter and application of 90 gram of cow manure gave the best response to the total dry weight of salam seeds. Giving cow manure and wood charcoal can also reduce the Pb content by 0,43 ppm. Keywords: cow manure, Syzygium polyanthum, used oil, wood charcoal

Pola Sebaran Titik Panas (Hotspot) Sebagai Indikator Terjadinya Kebakaran Hutan dan Lahan Di Kabupaten Aceh Barat

One of the provinces in Indonesia that experiences forest and land fires every year is Aceh Province. Aceh Barat District is one of the districts in Aceh Province where forest and land fires occur every dry season. Forest and land fires prevention can be done by utilizing hotspot data for analysis using geographic information systems (GIS). This research aims to analyze the distribution of hotspots and the correlation between rainfall and hotspots as an indicator of the occurrence of forest and land fires in West Aceh Regency in 2014-2019. This research uses MODIS LAPAN hotspots data, land cover distribution maps, peat land distribution maps, administrative maps and rainfall data from BMKG. The correlation between rainfall data and hotspot data was carried out by the bivariate pearson correlation test. The resuls of the research found that there were 576 hotspots in West Aceh Regency from 2014-2019. The district with the highest number of hotspots is in Samatiga District, namely 131 hotspots. The most dominant hotspots are in the peatland cover, as much as 64% and in the swamp scrub land cover area with 126 hotspots. Correlation test results show that rainfall with a negative correlation, that the decrease in rainfall is followed by an increase in hotspots. Keywords: Aceh Barat, fires, GIS, hotspot, rainfall

Pengaruh Media Tanam dan Intensitas Naungan Terhadap Pertumbuhan Bibit Api-Api (Avicennia alba)

Mangrove forests are ecosystems located in tidal areas in coastal areas, beaches, and small islands. The area of ​​mangrove forests is decreasing due to the conversion of mangrove forests into fishponds, plantations, and timber exploitation. Mangrove ecosystem rehabilitation activities need to be carried out through planting. Avicennia alba is a pioneer mangrove species that grows in mangrove swamp habitats on sheltered coastal locations, as well as in the saltier parts of the coastline. The objectives of this research is to analyze the effect of planting media and shade intensity on the seedling growth of Avicennia alba. The study used a two-factor experimental design in a complete randomized design. The first factor is planting media and the second one in shade intensity. The results showed that the shading intensity most influenced the growth of Avicennia alba seedlings. The variables affected include height, diameter, number of leaves, total wet weight, and total dry weight. The treatment combination that gave the best results was A2N0, that means the planting medium in the form of a mixture of mud, sand and compost and without shade (0% shade). Keywords: Avicennia alba, growth, photosynthesis, planting media, shade intensity

Curah Hujan, Anomali Sea Surface Temperature (SST) dan Kebakaran Hutan Sabana di Waingapu

Waingapu is one of the areas in Nusa Tenggara Timur Province which often suffered from savanna fires. Savanna fires prevention can be done by utilizing hotspot data for analysis using Geographic Information System (GIS). The climate is one of factors influence the occurrence of savanna fires in Waingapu. The purpose of this study was to analyze the relationship between precipitation, SST anomalies, and the occurrences of savanna fires in Waingapu. This research was conducted on February April 2021 at the Forest and Land Fires Laboratory, Department of Silviculture, Faculty of Forestry and Environment, IPB University. The data used are MODIS and VIIRS hotspot data, daily precipitation data and SST 3.4 anomaly data. The results showed that precipitation was inversely related to hotspots with a negative correlation value. SST anomaly is inversely related to precipitation a negative correlation value. While the SST anomaly with hotspots is directly proportional with a positive correlation value. Keywords: climate, hotspot, Geographic Information System (GIS), Waingapu

Analisis Pemasaran Kayu Hutan Rakyat di Kabupaten Bogor

The private forest is one of alternatives that played an important role in fulfillment of a need raw materials management industry wood and the needs of wood. Development of private forest can improve the people and land revenue increase productivity. Research conducted in sub-district Leuwisadeng, Cigudeg, and Jasinga shows that there are some marketing actors involved in marketing wood of the private forest of them are farmers, traders, and sawmill industries. The marketing of the three actors formed four marketing channels are grouped based marketing actors and average skidding distance. Channels that most efficient among fourth the channels is a channels II with the percentage of farmer’s share as 46.93 % and the ratio of K/B by 5.45. Types of plants most favored by farmers and consumers is the type of sengon it because sengon having a short, the age of harvest readily grows, and easy cultivation. The consumer likes kind of plant is because sengon have reachable prices, sengon not easily bad condition wood and widely available in market. Key words: bogor, farmer’s share, marketing efficiency rasio, private forest

Penyebaran Jenis Jirak (Symplocos fasciculata Zoll.) di Resort Kawah Ratu Taman Nasional Gunung Halimun Salak, Jawa Barat

Jirak (Symplocos fasciculata Zoll.) is one of the native species in the Gunung Halimun Salak National Park, especially in the Kawah Ratu resort. This plant can be used as a natural coloring agent, in addition to plant parts such as leaves can also be eaten and used as medicine. Because of the benefits of jirak, this plant is considered important to be cultivated. This study aims to analyze the density and distribution pattern of jirak (Symplocos fasciculata Zoll.) at Kawah Ratu Resort, Gunung Halimun Salak National Park. Data collection was carried out in two blocks located at the Kawah Ratu Resort of Mount Halimun Salak National Park, namely the Leles block and the Pamengpeuk block using the single plot method. The results showed that jirak distribution pattern in the two observation blocks was grouped. Keywords: Distribution, Jirak, Kawah Ratu Resort, Symplocos fasciculata Zoll., Gunung Halimun Salak National Park

Respon Pertumbuhan Tanaman Iler (Coleus scutellarioides (L.) Benth) pada Kondisi Cekaman Kekeringan terhadap Inokulasi Fungi Mikoriza Arbuskular (FMA)

Iler plant (Coleus artopurporeus L benth) is a plant that was originally cultivated as an ornamental plant and then developed as a medicinal plant because it contains flavonoids and anthocyanins. Drought stress is a major environmental problem that causes various changes in plant morphological, metabolic and physiological functions. Utilization of Arbuscular Mycorrhizal Fungi (AMF) is an effort to support the growth and development of iler plants in drought stress conditions. This study aims to determine the effect of AMF inoculation on the growth of iler plants under drought stress conditions, determine the optimal level of drought stress for ilher plant growth, and determine the best interaction between AMF inoculation and the level of drought stress on the growth of iler plants. The design used in this study was a completely randomized factorial 2-factor design. The first factor is AMF inoculation consisting of 2 levels, namely, without administration of AMF inoculum and AMF inoculum administration. The second factor is drought stress consists of 3 levels namely, 100% field capacity, 90% drought stress, and 45% drought stress. The results showed the effectiveness of the AMF inoculum test was able to increase the growth of iler plants based on parameters plant height, number of leaves, number of branches, leaf area, root length, root volume, root dry weight, number of spores and root infection. The optimal level of drought stress for iler plant growth is 90% drought stress, it is based on the parameters of plant height, number of leaves, number of branches, leaf area, root length, number of spores and root infection. There is the best interaction between AMF inoculation and 90% drought stress level on the growth of iler plants. These interactions can increase plant height, leaf area, number of spores and root infection. Keywords: arbuscular mycorrhizal fungi (FMA), drought stress, iler plants

Kebakaran Hutan dan Lahan di Pulau Rupat, Riau

Forest and land fires in Riau province generally occur on peatlands. This is due to the large area of ​​peatlands and intensive land conversion. Peat fires result in high PM 2.5 pollutant content, as happened on Rupat Island, Meranti Islands. Rupat Island has a history of repeated cases of forest and land fires in 2015 and 2019. This study aims to analyze the background of the causes of forest and land fires on Rupat Island, Riau Province. The research was carried out through several stages, namely data collection, data processing and data analysis. Forest fires on Rupat Island caused PM 2.5 content in February and March to have values ​​above the PM 2.5 content threshold. Based on the results of the study, it is known that the background causes of forest and land fires on Rupat Island, Riau, are caused by poor canal management, damaged peat conditions and the influence of the arrival of El Nino. This is the cause of the widespread forest and land fires on Rupat Island. Keywords: forest fires, peat land, Rupat island