scholarly journals CHARACTERISTICS OF THE PEAT SOIL Bacilllus sp.

2004 ◽  
Vol 10 (1) ◽  
pp. 31-35
Author(s):  
Iman Hidayat
Keyword(s):  
Phosphatase Activity ◽  
Positive Reaction ◽  
Lipase Activity ◽  
Protease Activity ◽  
Amylase Activity ◽  
Peat Soil ◽  
Cellulase Activity ◽  
Bacillus Species ◽  
Biochemical Tests ◽  
Central Kalimantan

Twenty two strains of Bacillus species have been isolated from the peat soil of Tanjung Puting, Central Kalimantan. All strains devided into seventeen groups which characterized using morphology and biochemical tests. All strains have been tested for lipase, amylase, protease, cellulase, and phosphatase activity. Thirteen Bacillus isolates tested gave positif reaction for lipase activity. Bacillus AR 018 was the best isolate for amylase activity, Bacillus AR 001 and Bacillus AR 002 for protease activity, Bacillus AR 009 for cellulase activity. Only one isolate shows positive reaction for phosphatase activity, notably Bacillus AR 007.

scholarly journals Protease, Lipase and Amylase Activities in Barred Loach, Nemacheilus Fasciatus C.V.

2020 ◽  
Vol 5 (1) ◽  
pp. 115-124
Author(s):  
Untung Susilo ◽  
Farida Nur Rachmawati
Keyword(s):  
Gastrointestinal Tract ◽  
Lipase Activity ◽  
Protease Activity ◽  
Amylase Activity ◽  
Wild Fish ◽  
Average Weight ◽  
Small Fish ◽  
Posterior Intestine ◽  
Digestive Capacity ◽  
Anterior Intestine

Barred loach is wild fish in which there is no information related to its enzymatic digestive capacity yet. Therefore research on this subject needs to be conducted.  The spectrophotometry method was used to study protease, lipase, and amylase activities in barred loach. The study used 89 fish with an average weight of 3.61 ± 0.26g, and 1.68 ± 0.21g.  The results showed that pH 7.0 was the highest protease activity. Similarly, lipase activity found  between pH 7.0 and pH 8.1. Still, the amylase activity found to be high at pH 8.1. Protease activity also found to be high in the posterior intestine than in the hepato-pancreas and anterior intestine. Lipase and amylase activities did not found differences between hepato-pancreas, anterior intestine, and posterior intestine. In conclusion, the protease, lipase, and amylase activities of barred loach found along the gastrointestinal tract in both large and small fish, which shows that barred loach can digest protein, fat, and carbohydrates in diets better.

scholarly journals Fungal N2O production in an arable peat soil in Central Kalimantan, Indonesia

2007 ◽  
Vol 53 (6) ◽  
pp. 806-811 ◽  
Author(s):  
Yosuke Yanai ◽  
Koki Toyota ◽  
Tomoaki Morishita ◽  
Fumiaki Takakai ◽  
Ryusuke Hatano ◽  
...  
Keyword(s):  
Peat Soil ◽  
N2o Production ◽  
Central Kalimantan

scholarly journals Populasi Serangga Penyerbuk Kelapa Sawit Elaeidobius kamerunicus Faust dan Pengaruhnya terhadap Nilai Fruit Set pada Tanah Berliat, Berpasir dan Gambut di Kalimantan Tengah, Indonesia

Agrikultura ◽  
2017 ◽  
Vol 28 (1) ◽  
Author(s):  
Fizrul Indra Lubis ◽  
Sudarjat Sudarjat ◽  
Danar Dono
Keyword(s):  
Sandy Soil ◽  
Fruit Set ◽  
Clay Soil ◽  
Peat Soil ◽  
Soil Types ◽  
Palm Fruit ◽  
Central Kalimantan ◽  
Palm Weevil ◽  
Elaeidobius Kamerunicus ◽  
Set Value

ABSTRACTPopulation of soil palm weevil pollinator Elaeidobius kamerunicus FAUST and its impact on fruit setvalue at clay, sandy and peat soil types in central Kalimantan, di IndonesiaOil palm weevil pollinator Elaeidobius kamerunicus Faust plays an important role in the increasing oilpalm fruit set value. Along with the development of oil palm, fruit set problems occurred in recentdecades in some parts of Indonesia. An experiment was carried out on a seven years old oil palmplantation located at Selangkun Estate, Kotawaringin Barat, Central Kalimantan, Indonesia to find outthe influence of population E. kamerunicus on pollination efficiency at clay, sandy and peat soil types.Relative to other soil types, a high weevil population on male (50,811 weevils/ha ; 72 weevils/spikelet)and female (219 weevils) inflorescences had been recorded at clay soil. Fruit set value on clay soil 58.9%and significantly different with sandy soil of 49.8% and peat soil of 46.4%. Population E. kamerunicusper ha influenced fruit set value at clay, sandy and peat soil types. Number of E. kamerunicus visitedfemale inflorescences did not influenced fruit set value at clay, sandy and peat soil types.Keywords: Clay soil, Elaeidobius kamerunicus, fruit set, peat soil, population, sandy soil ABSTRAKSerangga penyerbuk kelapa sawit Elaeidobius kamerunicus FAUST berperan penting dalam peningkatannilai fruit set kelapa sawit. Seiring dengan perkembangan kelapa sawit, adanya permasalahan nilai fruitset telah terjadi dalam beberapa kurun waktu di beberapa wilayah Indonesia. Penelitian dilakukan diperkebunan kelapa sawit yang telah berumur tujuh tahun, berlokasi di Selangkung, Kotawaringin Barat,Kalimantan Tengah, Indonesia dan bertujuan untuk mengetahui pengaruh populasi E. Kamerunicusterhadap efisiensi penyerbukan pada tipe tanah liat, pasir dan gambut. Berdasarkan tipe tanahdilaporkan bahwa tingginya populasi kumbang pada bunga jantan yaitu (50.811 kumbang/ha; 72kumbang/spikelet) dan bunga betina yang sedang mekar (219 kumbang) pada tipe tanah berliat.Adapun, nilai fruit set pada tanah liat sebesar 58,9% dan berbeda nyata dibandingkan dengan tanahberpasir (49,8%) dan gambut (46,4%). Populasi E. kamerunicus per ha berpengaruh terhadap nilai fruitset pada tipe tanah liat, pasir dan gambut. Namun, jumlah E. kamerunicus yang mengunjungi bungabetina yang sedang mekar tidak berpengaruh terhadap nilai fruit set pada tipe tanah liat, pasir dangambut.Kata Kunci : Elaeidobius kamerunicus, Fruit set , Populasi, Tanah Gambut, Tanah liat, Tanah Pasir

scholarly journals Carbon emissions from oil palm development on deep peat soil in Central Kalimantan Indonesia

Anthropocene ◽  
2018 ◽  
Vol 22 ◽  
pp. 31-39 ◽  
Author(s):  
Alue Dohong ◽  
Ammar Abdul Aziz ◽  
Paul Dargusch
Keyword(s):  
Carbon Emissions ◽  
Oil Palm ◽  
Peat Soil ◽  
Central Kalimantan

Response of soil enzyme activity to warming and nitrogen addition in a meadow steppe

Soil Research ◽  
2015 ◽  
Vol 53 (3) ◽  
pp. 242 ◽  
Author(s):  
Shiwei Gong ◽  
Tao Zhang ◽  
Rui Guo ◽  
Hongbin Cao ◽  
Lianxuan Shi ◽  
...  
Keyword(s):  
Climate Change ◽  
Enzyme Activity ◽  
Phosphatase Activity ◽  
Soil Nutrients ◽  
Soil Enzymes ◽  
Cellulase Activity ◽  
Soil Enzyme ◽  
Soil Enzyme Activity ◽  
N Addition ◽  
Soil C

Soil enzymes play vital roles in the decomposition of soil organic matter and soil nutrient mineralisation. The activity of soil enzymes may be influenced by climate change. In the present study we measured soil enzyme activity, soil microclimate and soil nutrients to investigate the response of soil enzyme activity to N addition and experimental warming. Warming enhanced phosphatase activity (35.8%), but inhibited the cellulase activity (30%). N addition significantly enhanced the activities of urease (34.5%) and phosphatase (33.5%), but had no effect on cellulase activity. Significant interactive effects of warming and N addition on soil enzyme activity were observed. In addition, warming reduced soil C (7.2%) and available P (20.5%), whereas N addition increased soil total N (17.3%) and available N (19.8%) but reduced soil C (7.3%), total P (14.9%) and available P (23.5%). Cellulase and phosphatase activity was highly correlated with soil temperature and water content, whereas urease activity was determined primarily by soil N availability. The results show that climate change not only significantly affects soil enzyme activity, but also affects the mineralisation of soil nutrients. These findings suggest that global change may alter grassland ecosystem C, N and P cycling by influencing soil enzyme activity.

Soil enrichment for the isolation of sporangial subgroup II Bacillus species, and observations concerning a coil-forming member of this group

1972 ◽  
Vol 18 (7) ◽  
pp. 1031-1038
Author(s):  
R. T. Wood ◽  
L. E. Casida Jr.
Keyword(s):  
Ph Value ◽  
Enrichment Culture ◽  
Divalent Cations ◽  
Soil Extract ◽  
Bacillus Species ◽  
Biochemical Tests ◽  
Soil Medium ◽  
Soil Enrichment ◽  
Subgroup Ii ◽  
Characteristic Features

Enrichment culture procedures are described which allow recovery from soil of mainly sporangial subgroup II Bacillus species, subgroup I plus subgroup II, or the latter plus a coil-forming member of subgroup II. After isolation, the coil-forming type grew normally and sporulated extensively only on agarized soil medium. Growth was normal on soil extract agar but sporulation was less extensive. Limited sporulation occurred when divalent cations were added to more conventional media. Normal vegetative growth occurred on other media investigated only when the pH value was held within relatively narrow limits. The presence of carbohydrate in agar media caused partial growth inhibition, a lack of catalase activity, and the formation of very long coiled cells plus pleomorphic cells, whereas overt cell lysis occurred in vigorously shaken broth cultures. These responses possibly reflect an unbalanced growth condition caused by growth at pH extremes, and not by carbohydrate per se. The characteristic features that set the coil-forming bacilli apart from other subgroup II Bacillus species were shown to be (1) their inability to grow at pH values below 6.5, (2) their inability to ferment carbohydrates, (3) their high oxygen requirement for growth, and (4) their ability to reduce thiosulfate to H2S. In addition, these bacilli can be distinguished from closely related established species by other biochemical tests.

Impact of Peat Fire on the Soil and Export of Dissolved Organic Carbon in Tropical Peat Soil, Central Kalimantan, Indonesia

2018 ◽  
Vol 2 (7) ◽  
pp. 692-701 ◽  
Author(s):  
Kazuto Sazawa ◽  
Takatoshi Wakimoto ◽  
Masami Fukushima ◽  
Yustiawati Yustiawati ◽  
M. Suhaemi Syawal ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Peat Soil ◽  
Central Kalimantan ◽  
Tropical Peat ◽  
Peat Fire

scholarly journals Amylase and acid phosphatase activity in potato tubers treated with gibberellic acid and stored at 2°C and 8°C

2015 ◽  
Vol 30 (1) ◽  
pp. 95-101 ◽  
Author(s):  
M. Bielińska-Czarnecka ◽  
K. Białek
Keyword(s):  
Acid Phosphatase ◽  
Gibberellic Acid ◽  
Phosphatase Activity ◽  
Acid Phosphatase Activity ◽  
Amylase Activity ◽  
Amylolytic Activity ◽  
Potato Tubers ◽  
Two Peaks

Amylase activity was higher in tubers stored at 2°C and mare marked in the soaked ones (both in water and in GA<sub>3</sub>). In the late and difficult-sprouting cv. Uran, sokaing resulted in increased amylolytic activity also at 8°C stored tubers. On the contrary, the acid phosphatase activity was a little higher at 8°C than at 2°C stored tubers. At the former temperature two peaks of activity were marked:, in November–December and February–March.

scholarly journals The Effect of Paraquat, Difenoconazole, and Butylphenyl Methylcarbamate (BPMC) on CO2 Emissions and Phenolic Acids in Peat Soil

2017 ◽  
Vol 22 (2) ◽  
pp. 77-85
Author(s):  
Indri Hapsari Fitriyani ◽  
Syaiful Anwar ◽  
Arief Hartono ◽  
Diah Tjahyandari
Keyword(s):  
Soil Sample ◽  
Co2 Emissions ◽  
Phenolic Acids ◽  
Soil Ph ◽  
Phenolic Acid ◽  
Co2 Emission ◽  
Oxidation Reaction ◽  
Peat Soil ◽  
Ch4 Emission ◽  
Central Kalimantan

Pesticides are widely used in agriculture, including on peat soil. The objective of this study was to analyze the effect of the application of paraquat, difenoconazole, and butylphenyl methylcarbamate (BPMC) on CO2 emissions and concentrations of phenolic acids in a peat soil. Peat soil sample was taken in District of Pulang Pisau, Central Kalimantan. The peat soil was applied with 1.89 mg kg-1 paraquat, 1.72 mg kg-1 difenoconazole and 1.65 mg kg-1 butylphenyl methylcarbamate (BPMC), then the soil was incubated for 1, 2, 4 , 5, 7, 10, 14, 21, 26 and 30 days. The results showed that the application of pesticides on peat soil increased CO2emission, and decreased CH4 emission and phenolic acid concentrations up to 30 days of incubation. The CO2 emmisions were derived from C of degraded pesticides and from C of phenolic acids, although the oxidation reaction was not accompanied by the change of soil pH. Keyword: CO2 emission, phenolic acids, butylphenyl methylcarbamate (BPMC), difenoconazole, paraquat, peat soil

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