scholarly journals PENCUCIAN BAHAN ORGANIK TANAH PADA TIGA PENGGUNAAN LAHAN DI DAERAH HUTAN HUJAN TROPIS SUPER BASAH PINANG-PINANG GUNUNG GADUT PADANG

Jurnal Solum ◽  
2011 ◽  
Vol 8 (1) ◽  
pp. 34
Author(s):  
Yulnafatmawita Yulnafatmawita ◽  
Adrinal Adrinal ◽  
Arief Fauzan Hakim
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Soil Surface ◽  
Soil Samples ◽  
Annual Rainfall ◽  
Undisturbed Soil ◽  
Physical Laboratory ◽  
West Sumatra

Study about soil organic matter (SOM) leaching in soil profiles of tropical rain forest was conducted in Bukit Pinang-Pinang, the upper footslope of Mt. Gadut in West Sumatra, and in Soil Physical laboratory Andalas University Padang.  Bukit Pinang-Pinang is located on 480-640 m asl and geographically is between 100°29’40” and 100°30’20 E”  as well as between 0°54’55” and 0°55’45”S.  This rain forest area is known as a super wet area because it receives high annual rainfall (>3500 mm).  The objective of this research was to measure the amount of SOM leached from top soil into the deeper soil.  Undisturbed soil samples were taken from three different land uses, forest, bush, and mixed garden, on the top, middle, and foot slopes.  Undisturbed soil samples were leached with distilled water as the amount of rainfall accepted in natural condition. The results showed that, land use change from forest into ecosystems of mixed garden (for over 50 years with 100% soil surface coverage and without any cultivation) and bush land (for over 20 years left) did not cause the SOM content in the profiles decreased. Amount of SOM leached from the top 0-10 cm was found greater from mixed garden, then followed by forest on the upper slope, forest on the middle slope, and bush area.Keywords: SOM leaching, land use change, tropical rain forest, bush, mixed garden

scholarly journals PENGUKURAN INFILTRASI TANAH BUKIT PINANG-PINANG KAWASAN HUTAN HUJAN TROPIK GUNUNG GADUT PADANG DI LABORATORIUM

Jurnal Solum ◽  
2009 ◽  
Vol 6 (2) ◽  
pp. 86
Author(s):  
Yulnafatmawita Yulnafatmawita ◽  
Asmar Asmar ◽  
Ricci Enrella
Keyword(s):  
Land Use ◽  
Natural Disaster ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Infiltration Rate ◽  
Soil Samples ◽  
Water Regulation ◽  
Forest Land ◽  
Undisturbed Soil

A research about infiltration rate of soils from Pinang-Pinang area, a super wet tropical rain forest gunung Gadut Padang, was conducted in soil laboratory Agriculture Faculty, Andalas University.  Pinang-pinang area is located in Kecamatan Pauh, in the upper footslope of Gadut mountain, functiong as water regulation for the area down under, especially Padang city.  This is caused by the fact that water from the Pinang-Pinang area will fow to the sea through Kuranji river.   This area is supposed to be protected to avoid natural disaster in the area down under.  This research was aimed to determine infiltration rate of soils under different land use in the Pinang-Pinang region.  There were three land use in this area, forest, mixed garden, and bush.  Undisturbed soil samples were taken from each land use by using 11-cm in diameter and 40 cm height tubes.  Soils samples were tightly closed, and brought into laboratory.  Infiltration rate from each soil samples were determined in laboratory.  The results showed that mixed garden gave the highest infiltration rate (38.4 cm jam-1) among the land use tested, and then followed by forest land use, and then bush land.Key Words: infiltration, land use, tropical rain forest

scholarly journals DEGRADASI LAHAN PADA KEBUN CAMPURAN DAN TEGALAN DI KABUPATEN DHARMASRAYA

Jurnal Solum ◽  
2007 ◽  
Vol 4 (1) ◽  
pp. 5
Author(s):  
Syafrimen Yasin ◽  
Gusnidar Gusnidar ◽  
Dedy Iskandar
Keyword(s):  
Land Use ◽  
Soil Depth ◽  
Soil Surface ◽  
Soil Samples ◽  
Imperata Cylindrica ◽  
Undisturbed Soil ◽  
Fertility Status ◽  
Land Use Types ◽  
Bulk Volume ◽  
Soil Fertility Status

A research conducted in Sungai Rumbai, Dharmasraya Regency and in Soil Laboratory Andalas university was aimed to evaluate soil fertility status on the depth below 0-20 cm from several land use types , especially under Mixed Garden and annual cultivated dryland soil.  Soil samples were taken on Ultisol at 0-8% slope (late-waving soil surface).  Land use types evaluated were forest, annual cultivated dryland, bush land, rangeland covered by Imperata cylindrica and mixed garden.  Composite soil samples for soil chemical analysis were taken on the 0-20 cm soil depth with four replications, and 5 drillings for each replication.  Undisturbed soil samples by using sample ring were used to analyze sol bulk volume.  The data resulted were compared to the criteria and were statistically tested using Analysis of Variance and then were continued by LSD at 5% level.  From the results of analyses could be concluded that land use  for mixed garden had the higher Organic Carbon (OC) content and the lower bulk volume (BV) than those for annual cultivated dryland soil.Key Words: Degradasi Lahan, Kebun Campuran, Tegalan

scholarly journals Characteristics and Stocks of Soil Nutrient under Various Land Use Types in a Super Wet Tropical Rain Forest Padang, West Sumatra

2018 ◽  
Vol 15 (1) ◽  
pp. 55
Author(s):  
Hermansah Hermansah ◽  
Nofrita Sendi ◽  
Yulnafatmawita Yulnafatmawita ◽  
Tsugiyuki Matsunaga ◽  
Toshiyuki Wakatsuki ◽  
...  
Keyword(s):  
Land Use ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Soil Depth ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
Land Use Type ◽  
Soil Nutrient Status ◽  
Land Use Types ◽  
West Sumatra

In order to clarify the characteristics and stocks of soil nutrient under various land use types in a super wet tropical rain forest in Padang, West Sumatera. We investigated the nutrient characteristics of the several samples of soils under different land use such as cacao plantation (CP), cinnamon plantation (CMP), mixed garden (MG), and primary forest (PF) in Gadut Mountain, Padang, West Sumatra. The soil nutrient characteristics varied among the different land use types. The range of nutrient characteristics under four land use type were 4.60 – 7.01% and 0.4 – 0.60 % for total carbon and total nitrogen and were 9.80 – 24.59, 0.68 – 2.07 and 0.30 – 0.8 mol (+) kg-1 for Ca, Mg and K, respectively. The highest content of soil nutrient status was found under MG, while the lowest soil nutrient status found at PF. This result indicated that the MG with various vegetation types might contribute in enriching the organic matter in soil. The soil nutrient content such as TN, exchangeable Ca, Mg and K tended to decrease with soil depth of each land use type. However, the sodium (Na) content in soil tended to increase within the soil depth. These were presumably due to evaporation of Na at surface soil within the study area was low. These study results showed that spatially the nutrient properties of soil were closely related to the land use type and management practices. It was suggested that the nutrient characteristics of soils under various land use types in a super wet tropical rain forest region, in Gadut Mountain, Padang West Sumatra were significantly affected by the land use types and land coverage.

Changes in the Abundance and Composition of a Microbial Community Associated with Land Use Change in a Mexican Tropical Rain Forest

2020 ◽  
Vol 20 (3) ◽  
pp. 1144-1155 ◽  
Author(s):  
Dulce Flores-Rentería ◽  
Irene Sánchez-Gallén ◽  
Diego Morales-Rojas ◽  
John Larsen ◽  
Javier Álvarez-Sánchez
Keyword(s):  
Land Use ◽  
Microbial Community ◽  
Land Use Change ◽  
Rain Forest ◽  
Tropical Rain Forest

Climate and land use change impacts on water resources in Sardinia (Italy)

2021 ◽  
Author(s):  
Dario Ruggiu ◽  
Salvatore Urru ◽  
Roberto Deidda ◽  
Francesco Viola
Keyword(s):  
Land Use ◽  
Water Resources ◽  
Land Use Change ◽  
Hydrological Cycle ◽  
Potential Evapotranspiration ◽  
Regional Scale ◽  
Annual Runoff ◽  
Annual Rainfall ◽  
Land Use Scenarios ◽  
Near Future

<p>The assessment of climate change and land use modifications effects on hydrological cycle is challenging. We propose an approach based on Budyko theory to investigate the relative importance of natural and anthropogenic drivers on water resources availability. As an example of application, the proposed approach is implemented in the island of Sardinia (Italy), which is affected by important processes of both climate and land use modifications. In details, the proposed methodology assumes the Fu’s equation to describe the mechanisms of water partitioning at regional scale and uses the probability distributions of annual runoff (Q) in a closed form. The latter is parametrized by considering simple long-term climatic info (namely first orders statistics of annual rainfall and potential evapotranspiration) and land use properties of basins.</p><p>In order to investigate the possible near future water availability of Sardinia, several climate and land use scenarios have been considered, referring to 2006-2050 and 2051-2100 periods. Climate scenarios have been generated considering fourteen bias corrected outputs of climatic models from EUROCORDEX’s project (RCP 8.5), while three land use scenarios have been created following the last century tendencies.</p><p>Results show that the distribution of annual runoff in Sardinia could be significantly affected by both climate and land use change. The near future distribution of Q generally displayed a decrease in mean and variance compared to the baseline.   </p><p>The reduction of  Q is more critical moving from 2006-2050 to 2051-2100 period, according with climatic trends, namely due to the reduction of annual rainfall and the increase of potential evapotranspiration. The effect of LU change on Q distribution is weaker than the climatic one, but not negligible.</p>

Land-use Change Dynamics, Soil Type and Species Forming Mono-dominant Patches: the Case ofPteridium aquilinumin a Neotropical Rain Forest Region

Biotropica ◽  
2014 ◽  
Vol 47 (1) ◽  
pp. 18-26 ◽  
Author(s):  
Ireri Suazo-Ortuño ◽  
Leonel Lopez-Toledo ◽  
Javier Alvarado-Díaz ◽  
Miguel Martínez-Ramos
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Soil Type ◽  
Rain Forest ◽  
Change Dynamics ◽  
Forest Region ◽  
Neotropical Rain Forest

Change in Land Use Alters the Diversity and Composition of Bradyrhizobium Communities and Led to the Introduction of Rhizobium etli into the Tropical Rain Forest of Los Tuxtlas (Mexico)

2011 ◽  
Vol 63 (4) ◽  
pp. 822-834 ◽  
Author(s):  
Ernesto Ormeño-Orrillo ◽  
Marco A. Rogel-Hernández ◽  
Lourdes Lloret ◽  
Aline López-López ◽  
Julio Martínez ◽  
...  
Keyword(s):  
Land Use ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Los Tuxtlas ◽  
Rhizobium Etli

scholarly journals The importance of radiation fog in the tropical seasonal rain forest of Xishuangbanna, south-west China

2008 ◽  
Vol 39 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Wen Jie Liu ◽  
Ping Yuan Wang ◽  
Jin Tao Li ◽  
Peng Ju Li ◽  
Wen Yao Liu
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Hydrological Cycle ◽  
Annual Rainfall ◽  
Rain Forests ◽  
Radiation Fog ◽  
West China ◽  
South West ◽  
The Mean ◽  
Effects Of Radiation

The tropical rain forest in Xishuangbanna, SW China has a high floristic diversity and is closely related to Malaysian rain forests in flora. This forest would not normally be established in such a climatic region as Xishuangbanna (less precipitation and lower air temperature) compared to those of the lowland moist tropics. The mean annual rainfall is 1487 mm, which is considerably lower than rain forests in other parts of the world. It is believed that the frequent occurrence of radiation fog might play an important role in the water relations of plants and in the hydrological cycle of this type of rain forest. However, the multiple hydrological and ecological effects of radiation fog are not well understood. In this paper, we describe and analyze the significance of radiation fog to this forest, and develop a hypothesis that fog plays an important role in the presence of the tropical rain forest in Xishuangbanna. Suggestions for further research on the significance of fog are offered.

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