KARAKTERISTIK HABITAT POHON PENGHASIL GAHARU DI BEBERAPA HUTAN TANAMAN DI JAWA BARAT (Habitat Characteristics of Gaharu Inducing Tree Species (Aquilaria spp.) in Several Forest Plantations in West Java)
01 Jan 2010-
TL;DR: In this paper, the authors collected data and information of habitat characteristics of eaglewood (gaharuinducing tree species) in three forest plantations to support gaharu plantation development in Indonesia.
Abstract: The research was aimed at collecting data and information of habitat characteristics of eaglewood (gaharuinducing tree species) in three forest plantations to support gaharu plantation development in Indonesia. The research was carried out in Carita (Banten), Dramaga (Bogor), and Kampung Tugu (Sukabumi). Observed characteristics included: topography, climate, physical and chemical characteristics of the soils. In addition, the underground vegetation were analyzed to obtain information on the underground vegetations composition of gaharu plantation. Results indicated that gaharu grew quite favourably in flat to undulating landscape, low to high temperature (20-32 o C), and high rainfall (> 1,500 mm/year), hard soil texture (clay), fast drainage, pH of about 4.5-5.1, very low to high base saturation (1.2-78.8%) and low toxic element. The dominant and co-dominant underground species in Carita were jampang (Panicum disachyum Linn.) and selaginela (Selaginella plana Hiern.), while in Dramaga were pakis (Dictyopteris irregularis Presl.) and seserehan (Piper aduncum Linn.) and in Kampung Tugu were jampang (Panicum disachyum Linn.) and rumput pait (Panicum barbatum Lamk.).
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31 Jan 2014
TL;DR: In this paper, the authors analyzed the vegetation of orchid habitat and to determine orchids species around Tambing Lake, Lore Lindu National Park area, Sedoa village, Lore Utara district, Poso regency, Central Sulawesi.
Abstract: The research objective were to analyze the vegetation of orchid habitat and to determine orchids species around Tambing Lake, Lore Lindu National Park area, Sedoa village, Lore Utara district, Poso regency, Central Sulawesi. The study employed survey method. The vegetation was recorded in 20m x 20m plots by using purposive sampling methods in orchid habitat. The collected data include all plant species and growth level swithin the sampling plot. The total observation area was 0,16 ha. The results showed that the total number of tree level of plant species recorded was 38 species comprising 9 families with the highest Importance Value Index (IVI) was 61,62%. The total number of pole level of plant species recorded was 34 species comprising 7 families with the highest IVI was 74, 43%. The total number of sapling level of plant species recorded was 37 species comprising 9 families with the highest IVI was 65,41%. Hence, The total number of seedling level of plant species recorded was 31 species comprising 7 families with the highest IVI was 49,34%. The highest IVI at all growth levels was achieved by Kaha ( Castanopsis accuminatisima ). In addition, there were 12 orchid species comprising 8 genus founded in this area,i.e; Agrostophyllum, Bulbophyllum, Calanthe, Coelogyne, Dendrobium, Dendrochyllum, Eria, and Trichotosia. Keywords : Vegetation, Orchids Habitat, Tambing Lake, Lore Lindu National Park. Normal 0 false false false IN X-NONE X-NONE /* Style Definitions */
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8 citations
TL;DR: In this paper, the authors evaluated the impact on global warming potential (GWP) of GHG emissions from rice paddies when an SRI crop is managed with different water table levels.
Abstract: The System of Rice Intensification (SRI) is known as a climate-smart agricultural practice that increases rice production by changing the management of plants, soil, water, and nutrients. SRI water management relies on intermittent irrigation rather than on the continuous flooding of conventionally managed rice production. Different water table levels affect the soil conditions which contribute to different fluxes of greenhouse gas (GHG) emissions. This study estimated the impact on global warming potential (GWP) of GHG emissions from rice paddies when an SRI crop is managed with different water table levels. In this study, CO2 equivalence was assessed using a Simple Greenhouse Gas model, and an artificial neural network model for assessing CH4 and N2O. SRI paddy rice was grown in experimental pots under varying water table treatments, with the water table controlled by using Mariotte tubes set at + 2, 0, − 3, − 5, − 7, and − 12 cm from the soil surface. GHG emissions, which could be monitored more closely in pot trials than in fields, are a composite of the plants’ respiration, soil respiration (which is a result primarily of microbial activity), and the respiration that results from root exudates. With SRI practices, rice paddies can serve as a sink rather than a source for CH4 as seen from the negative values for CH4 emissions at all water table treatments. While there were N2O emissions with SRI practice, they were much less in terms of CO2 equivalence than the GWP reduction achieved by reducing CH4. Overall, under the experimental conditions the best water table level for SRI cultivation, with the most rice produced relative to GHG emissions, was − 5 cm from the soil surface. For each kg of grain produced, there were 0.80 kg CO2 eq of GHG emissions. By comparison, a normally flooded paddy field with usual crop management methods emits 1.97 kg CO2 eq per kg of grain produced, almost 150% more. This finding that a water table of − 5 cm is optimal will not necessarily apply for all field conditions, but the research addresses the desirability of seeking to optimize between GHG reductions and increased yield when growing paddy rice, and of developing appropriate methodology for achieving this composite objective.
6 citations
Cites background from "KARAKTERISTIK HABITAT POHON PENGHAS..."
...The trial period overlapped 1 3 part of the general rainy season which occurs between September and February (Pratiwi and Turjaman 2010)....
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...1 3 part of the general rainy season which occurs between September and February (Pratiwi and Turjaman 2010)....
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29 Dec 2017
TL;DR: In this article, the water table is controlled by using mariotte tube and set at -12, -7, -5, -3, 0, and +2 cm from the soil surface.
Abstract: Controlling water table is the way to manage water in SRI paddy field. Farmers tend to apply different water table depend on their local water management practices. It may have different effect on plant growth that can be seen in the number of tillers. In this study, tiller development of SRI paddy was studied by using experimental pots under various water tables treatments. The water table is controlled by using mariotte tube and set at -12, -7, -5, -3, 0, and +2 cm from the soil surface. The result shows that soil moisture (Ɵ) were fluctuated due to intermittent irrigation and water table treatment. It affects the tiller growths rate that varied with average value 0.21-0.29 tiller/day. The first tiller appears at 18 days after transplanting (DAT). The tillers number keep increasing until reaching the highest number (around 63 to 72 DAT). This empirical study showed that setting water table at -5 cm under soil surface in SRI paddy cultivation is the best to reach high tiller number, and highest land and water productivity compare to another water table treatments. Consistency in producing tiller from beginning tiller production until the end of cultivation season could be seen from this treatment.
4 citations
01 Jan 2021
TL;DR: In this article, the best water level for SRI paddy cultivation based on its economic value regarding paddy field ecosystem service was determined by considering the amount of irrigation water used, the reduction of greenhouse gas emissions and the yields.
Abstract: From an economic perspective, rice is an important crop. The System of Rice Intensification (SRI) is known as a rice production technology with a high economic value. The economic value varies depending on different implementations of water level in the SRI paddy field. This study was conducted to determine the best water level for SRI paddy cultivation based on its economic value regarding paddy field ecosystem service. In this study, SRI paddy rice was cultivated in experimental pots, and the water levels were regulated at -12, -7, -5, -3, 0 and +2 cm from the soil surface by using Mariotte tubes. The economic value can be calculated using the Total Economic Value (TEV) framework, namely, by considering the amount of irrigation water used, the reduction of greenhouse gas emissions and the yields. The value is then optimized by Excel solver to maximize the balance in economic value as the objective. The water level was set as a changing value with the constraint not less than -12 and not more than +2. This analysis found that the best water level for SRI paddy cultivation is -5.88 cm from the soil surface based on its economic value (49.708 million IDR per hectare).
2 citations
Cites background from "KARAKTERISTIK HABITAT POHON PENGHAS..."
...This location is classified as being very humid due to rainfall [11]....
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References
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01 Jan 1974
TL;DR: Aims and methods of vegetation ecology are studied to propose new strategies for the sustainable management of vegetation in the arid areas.
Abstract: Aims and methods of vegetation ecology , Aims and methods of vegetation ecology , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
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70 citations