Pengaruh Perlakuan Awal Terhadap Benih Tomat (Lycopersicon Esculentum Mill.)

MAMAN RAHMANSYAH,1978.Effect of preconditioning treatments on tomato seeds.Berita Biologi 3(9): 473-4 75. The study the effect of preconditioning treatments for tomato seeds on plant growth and production,five thousand tomato seeds were slowly rehydrated from 6 to 12% moisture content.The treated seeds were sown on moist straw paper at low (26°-28°C)and high (26°- 36°C fluctuated temperatures,others were planted after storage for 48 and 60 hours in the in-Cubator (40 C).The germination percentages of seeds,pollen fertility, the percentage of fruits developed, the average weight of fruit and the weight of 1000 seeds were evaluated.Plants derived from rehydrating seeds and stored for 48 hours at 40°C gave the best performance on their germination (more than 90%),pollen fertility (95%) and also the highest total fruits harvested but not on fruit and seed weights.The best result of seed treatment were 12% of moisture content and its were stored for 48 hours at 40°

PENGARUH PERLAKUAN AWAL TERHADAP BENIH TOMAT (LYCOPERSICON ESCULENTUM Mill.)

MAMAN RAHMANSYAH,1978.Effect of preconditioning treatments on tomato seeds.Berita Biologi 3(9): 473-4 75. The study the effect of preconditioning treatments for tomato seeds on plant growth and production,five thousand tomato seeds were slowly rehydrated from 6 to 12% moisture content.The treated seeds were sown on moist straw paper at low (26°-28°C)and high (26°- 36°C fluctuated temperatures,others were planted after storage for 48 and 60 hours in the in-cubator (40 C).The germination percentages of seeds,pollen fertility, the percentage of fruits developed, the average weight of fruit and the weight of 1000 seeds were evaluated.Plants derived from rehydrating seeds and stored for 48 hours at 40°C gave the best performance on their germination (more than 90%),pollen fertility (95%) and also the highest total fruits harvested but not on fruit and seed weights.The best result of seed treatment were 12% of moisture content and its were stored for 48 hours at 40°

PERBANDINGAN POLA ROMBAK SELULOSA OLEH BEBERAPA JAMUR BASIDIOMYCETES

MAMAN RAHMANSYAH, 1989,Comparative capability of cellulose degradation by Basidiomy cetes fungi.Berita Biologi 3(9) 450 - 453.Cellulosa is natural resource that still found abandon and its can be composted by themselves naturaly to the earth.Basidiomycetes fungi offered to convert those waste organic matter into useful product.Four Basidiomycetes fungi (Auricularia polytricha, Coprinus cinereus, Pleurotus qstreatus and Volvariella valcacea) have been tested to degrade riee straw, Whatman filter paper and cellulose powder. Three replicates of 3 grams of media were inoculated by different fungus land were fermented for 21 days at room temperature (± 28 C). Biodegradation rare was measured by the lost weight basis of media and bioconvertion rate was detected by stating ability of enzime (cellulose), which were extracted from cellulose powder culture,to convert CMC substrat and glucose production.The result shows that C. cinereus has almost 3 to 4 times degrading and converting capability compared to other fungi

Aktivitas Fosfatase Tanah Dilingkungan Bentang Hutan Alami Dan Non-alami [Phosphatase Activity in Soil Belongs to Natural and Non-natural Forest Landscape]

The spatial dispersal of acid and alkaline phosphates activity in forest soils appears to be controlled by position in the landscape and its soil microbial density. Soil bacteria expressively produced significant level of acid phosphatase in the investigation.The variety of acid phosphatase activity (8.25-37.55 />-nitrophenol.g"'soil.h"') noted higher and followed by alkaline (0.78-7.15 p-nitrophenol.g-'soil.h" ), correspondingly. Acid and alkaline phosphates were exist in both of soil of natural as well as for non-natural forest soil landscape, with the value (po/o=0.6210) of correlation are 0.6889 and 0.6532, respectively. Phosphate Solubilizing Bacteria (PSB) average density in natural forest soil equivalent to 0.61xl0Â colony forming unit (cfu) and total bacteria is 160xl0 cfu, while the PSB in non-natural forest soil is 7.75xl0 cfu and total bacteria is 48.25x10' cfu. Concerning to the forest environment as soil bacteria inhabitants of PSB, there were significantly difference of PSB population in natural and non-natural landscape forest. Forest environment is negatively affect the soil enzymes activities under Pinus maritima and Caliandra calothyrsus as the lowest activities, and to the highest ones under the Schima wallichii and Eucalyptus saligna vegetation

Pengaruh Inokulasi Bakteri Terhadap Pertumbuhan Awal Jarak Pagar (Jatropha Curcas L.)

Bacterial inoculants affect the early growth of Jatropha (Jatropha curcas L). Genera ofAzotobacter, Bacillus, Chromobacterium, Citrobacter, Nitrosomonas, Rhizobium, andSpaerotillus natans were soil bacterial isolates. The soil was collected from numerous placesaround Pontianak, West Kalimantan. Those isolates were used as inoculants, and formulatedto single and mixed bacterial inoculants, then used to stimulate the early growth of jatrophaseedling in 15 weeks at greenhouse condition. Bacterial inoculations caused better growthperformance compared to its control as pure soil garden medium without inoculations, andneither to bare soil dresses with compost. In the presence of inoculants, plant height wasaccelerated quickly while other inoculants affected to stalk diameter development. Daily growthperformance of jatropha peaked in 8 and 11 weeks after inoculation of Citrobacter andNitrosomonas bacterial component were used as single inoculant, respectively. The increasingof shoot biomass accumulation was three times as caused by single inoculants (Bacillus sp),and the highest one up to four times of biomass weight caused by a mixture inoculants asconsortium of Azotobacter, Bacillus, and Nitrosomonas spp. That selective inoculant hasopportunity to be used for jatropha farming, and this basic study is meaningful to jatropacultivation for standing to bio-fuel resources.Keywords: Jatropha curcas L., inoculants, Azotobacter, Bacillus, Chromobacterium,Citrobacter, Nitrosomonas, Rhizobium , Spaerotillus natans

Performa Bakteripadatanah Tercemar Pestisida [Bacterial Perform in Soil Contaminated with Pesticide]

Preliminary study on bacterial survive in soil containing pesticide has been carried out. Soil samples collected from Lembang and Dieng. The soil deprive from agriculture area that intensively using pesticide, and compared to other samples gathered from forest soil. All samples examined for total bacteria, denitrification bacteria, phosphate solubilizing bacteria, soil induce respiration, urease and phosphatase activities. Pattern of whole parameters in each soil sample configured similarly, but the value performed differently in the same parameters. Total bacterial population in soil samples also inspected after the samples amended with some certain pesticides. Survival bacteria subjected to media amended with insecticide (Propoxur, Diazinon, and Chlorpyrifos), and herbicides (Bromacil and 2,4-D), and correlation of bacterial growth between sample location were varied. Bacterial degrading pesticide particularly isolated from the soil samples containing 1000 ppm Curzate (fungiside) and 500 ppm 2,4-D.The isolates then cultured in the medium containing insecticide and herbicide, and the response on growth observed in 7 days incubation. Bacterial perform were meaningful to reference of soil degrading pesticide residue in agriculture soil; and it would make representative reference in an effort to use bacteria throughout biofertilizer improvement

Production of Acid Phosphatase in Bacillus SP. Isolated From Forest Soil of Gunung Salak National Park

Produktivitas Fosfatase Asam pada Bacillus sp. yang Diisolasi dari Tanah Hutan TamanNasional Gunung Salak. Pada pengamatan ini dilakukan karakterisrik bakteri pelarut fosfatyang diisolasi dari tanah hutan Taman Nasional Gunung Salak. Sebanyak 21 koloni hasil isolasidiuji terhadap produktivitas enzim fosfatase berdasar pelarutan media mengandung fosfat.Isolat yang terkuat melarutkan fosfat diidentifikasi sebagai Bacillus sp. Pada pengamatanlanjutan terhadap strain teruji dilakukan penumbuhan pada media cair selama 90 jam inkubasi,dan hasilnya ternyata mampu melarutkan fosfat inorganik (Pi) dari sumber trikalsium fosfat(Ca-Pi) dan alumunium fosfat (Al-Pi) masing-masing pada kisaran 1,2 sampai 152 dan 0.8 sampai25 mg.L-1; dan menunjukkan aktifitas enzim fosfomonoesterase antara 0.2 sampai 1.01 unitpada media yang mengandung larutan para-nitrophenylphosphate sebagai media fosfatorganik (Po) artifisial. Konsumsi glukosa pada media yang diukur selama pertumbuhan sejalanpula dengan produk ortofosfat sebagai akibat adanya aktifitas enzim fosfatase. Peningkatanfosfatase juga sejalan dengan bertambahnya biomassa sel bakteri dan penambahan produkasam glukonat. Penurunan pH dari 7 menjadi 5 diakibatkan peningkatan produk asam glukonatdi dalam media tumbuh. Bakteri pelarut fosfat yang berasal dari tanah hutan Taman NasionalGunung Salak dapat memproduksi fosfatase asam untuk memineralisasi sumber-sumber fosfatmenjadi sumber nutrisi yang siap digunakan oleh akar tumbuhan, dan itu merupakan prediksikuat untuk menjadikan isolat bakteri pelarut fosfat sebagai sumber bahan pupuk hayati

AKTIVITAS FOSFATASE TANAH DILINGKUNGAN BENTANG HUTAN ALAMI DAN NON-ALAMI

The spatial dispersal of acid and alkaline phosphates activity in forest soils appears to be controlled by position in the landscape and its soil microbial density. Soil bacteria expressively produced significant level of acid phosphatase in the investigation.The variety of acid phosphatase activity (8.25-37.55 />-nitrophenol.g"'soil.h"') noted higher and followed by alkaline (0.78-7.15 p-nitrophenol.g-'soil.h" ), correspondingly. Acid and alkaline phosphates were exist in both of soil of natural as well as for non-natural forest soil landscape, with the value (po/o=0.6210) of correlation are 0.6889 and 0.6532, respectively. Phosphate Solubilizing Bacteria (PSB) average density in natural forest soil equivalent to 0.61xl0Â colony forming unit (cfu) and total bacteria is 160xl0 cfu, while the PSB in non-natural forest soil is 7.75xl0 cfu and total bacteria is 48.25x10' cfu. Concerning to the forest environment as soil bacteria inhabitants of PSB, there were significantly difference of PSB population in natural and non-natural landscape forest. Forest environment is negatively affect the soil enzymes activities under Pinus maritima and Caliandra calothyrsus as the lowest activities, and to the highest ones under the Schima wallichii and Eucalyptus saligna vegetation

PERFORMA BAKTERIPADATANAH TERCEMAR PESTISIDA

Preliminary study on bacterial survive in soil containing pesticide has been carried out. Soil samples collected from Lembang and Dieng. The soil deprive from agriculture area that intensively using pesticide, and compared to other samples gathered from forest soil. All samples examined for total bacteria, denitrification bacteria, phosphate solubilizing bacteria, soil induce respiration, urease and phosphatase activities. Pattern of whole parameters in each soil sample configured similarly, but the value performed differently in the same parameters. Total bacterial population in soil samples also inspected after the samples amended with some certain pesticides. Survival bacteria subjected to media amended with insecticide (Propoxur, Diazinon, and Chlorpyrifos), and herbicides (Bromacil and 2,4-D), and correlation of bacterial growth between sample location were varied. Bacterial degrading pesticide particularly isolated from the soil samples containing 1000 ppm Curzate (fungiside) and 500 ppm 2,4-D.The isolates then cultured in the medium containing insecticide and herbicide, and the response on growth observed in 7 days incubation. Bacterial perform were meaningful to reference of soil degrading pesticide residue in agriculture soil; and it would make representative reference in an effort to use bacteria throughout biofertilizer improvement

Sistem Kultivasi Organik Pada Kacang Tanah (Arachis Hypogea L.) Dengan Memanfaatkan Tingkat Kematangan Kompos

In order to support a sustainable agriculture system, an organic farming purpose had been carried out all through groundnut cultivation. In this experiment, the combination of phosphate solubilizing bacteria (Pseudomonas sp.), fixing nitrogen bacteria (Rhizobium spp.), and fungal degrading cellulose (Trichoderma sp. and Aspergillus sp.) were used as inoculant. Organic substrate as a green manure compost and cattle waste was mixing with the inoculant to utilize into biofertilizer improvement. Full and half fermented compost materials designed for soil augmentation. Half fermented compost materials exploited to semi-on-site-composting practice in appropriate to fuel plant growth. Result of the treatment evaluated through plant growth and the pods yield. There have not significant different among biofertilizer handling, and all have the exclusion to the control. As du