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All Journal Jurnal Ilmu Lingkungan Caraka Tani: Journal of Sustainable Agriculture Jurnal Sumberdaya Lahan
Ali Pramono
Indonesian Agricultural Environment Research Institute (IAERI),
Agriculture, Biological Sciences & Forestry Environmental Science

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BACTERIAL Cr (VI) REDUCTION AND ITS IMPACT IN BIOREMEDIATION Pramono, Ali; Rosariastuti, MMA Retno; Ngadiman, N; Prijambada, Irfan D
Jurnal Ilmu Lingkungan Vol 11, No 2 (2013): Oktober 2013
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (178.798 KB) | DOI: 10.14710/jil.11.2.120-131

Abstract

ABSTRACTChromium is hazardous pollutant for ecosystem caused chromium especially inhexavalent form is very toxic, has high solubility and mobility, teratogenicity, mutagenicity andcarcinogenicity to living system related with its oxiding power. Remediation of soilcontaminated of heavy metals was important caused soil as medium for food producing.Conventional methods for heavy metals remediation consist of physical and chemical processbut these applications were costly and less effective. One of the remediation technologies is theusing living organisms such as microorganisms, because they have ability to reduce Cr(VI) intonon toxic form, Cr(III). The aims of this research were to evaluate the reduction activity ofrhizobacterial isolate and to identify the isolate which take a role in reducing chromiumabsorption by plant. The results showed that Isolate 39 was able to grow on LB mediumcontaining 200 ppm Cr(VI). Isolate 39 reduced Cr(VI) up to 15 ppm concentration level inminimal medium. Isolate 39 has ability to reduce Cr(VI) both at growing cells and resting cellsconditions up to 100% and 51% within 18 hours, respectively. Isolate 39 increased thephytostabilization ability of chromium by Zea mays at 30 days after seeding 3.8 timescompared than control. Based on physiological characteristics and partial sequencing of 16SrRNA gene, Isolate 39 was identified as Agrobacterium sp.Key words : Agrobacterium sp, hexavalent chromium, reduction, Zea mays
The Stratification of Organic Carbon and Nitrogen in Top Soils as Affected by the Management of Organic and Conventional Rice Cultivation Anshori, Arif; Pramono, Ali; Mujiyo, Mujiyo
Caraka Tani: Journal of Sustainable Agriculture Vol 35, No 1 (2020): April
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (597.192 KB) | DOI: 10.20961/carakatani.v35i1.34488

Abstract

Organic and conventional management in rice cultivation have an impact on the nature of soil and the sustainability of agricultural system. This study aimed to determine the stratification of organic carbon and nitrogen in top soil from organic and conventional rice management. Top soil samples from organic and conventional rice management were taken before planting rice to find out the parameters of several soil characteristics. After rice was planted, top soil samples were taken at the depths of 0-4, 4-8, 8-12, 12-16, 16-20, 20-24 and 24-28 cm from organic and conventional rice fields, to determine the total organic carbon, total nitrogen and nitrate. The results show that organic rice management will provide better soil properties. Stratification of organic carbon and nitrogen was found in top soil from organic and conventional rice fields. Organic rice field appeared to have organic carbon content that was significantly higher than that of conventional rice field, and it is concentrated on top soil surface. The total nitrogen content in layers 0-4 cm and 4-8 cm in organic rice field was considerably higher than in conventional, but the content was different in layers 8-24 cm. Nitrate content was significantly different in top soil 12-16, 16-20 and 20-24 cm, significantly in top soil 8-12 cm, with nitrate in top soil of conventional rice field higher than in organic rice field. However, it was not significant in 0-4 cm and 4-8 cm top soils. This condition was influenced by organic and synthetic chemical fertilization, nitrification, denitrification and leaching.
PENINGKATAN PRODUKTIVITAS PADI SAWAH TADAH HUJAN MELALUI PENERAPAN TEKNOLOGI ADAPTIF DAMPAK PERUBAHAN IKLIM Wihardjaka, Anicetus; Pramono, Ali; Sutriadi, Mas Teddy
Jurnal Sumberdaya Lahan Vol 14, No 1 (2020)
Publisher : Indonesian Center for Agriculture Land Resource Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (639.341 KB) | DOI: 10.21082/jsdl.v14n1.2020.25-36

Abstract

Abstrak. Optimalisasi lahan sawah tadah hujan memberikan kontribusi terhadap ketersediaan pangan nasional yang sebagian besar masih dipasok dari lahan optimal sawah beririgasi. Lahan suboptimal sawah tadah hujan berpotensi dalam mendukung ketersediaan pangan nasional. Lahan sawah tadah hujan sangat rentan terhadap dampak perubahan iklim terutama cekaman kekeringan dan serangan organisme pengganggu tanaman. Antisipasi dampak perubahan iklim di lahan sawah tadah hujan dilakukan dengan penerapan teknologi adaptif dan sekaligus sebagai upaya mirigasi gas rumah kaca. Beberapa teknologi adaptif yang berpotensi meningkatkan produktivitas padi sawah tadah hujan adalah penggunaan varietas unggul baru, penentuan waktu tanam dengan kalender tanam, pengelolaan sumberdaya air dengan teknologi embung, pengendalian OPT terpadu dan pengelolaan lahan. Teknologi mitigasi seperti pengairan berselang, penggunaan varietas rendah emisi, penggunaan bahan amelioran, pemupukan secara berimbang, dan integrasi tanaman padi ? ternak efektif menurunkan emisi gas rumah kaca di lahan sawah tadah hujan. Integrasi tanaman pangan-ternak bebas limbah merupakan salah satu upaya mensinergiskan aksi adaptasi dan aksi mitigas terhadap perubahan iklim di ekosistem lahan sawah tadah hujan. Abstract. Optimization of rainfed lowland rice contributes on national food availability which is still generally supplied from irrigated lowland rice. The sub-optimal rainfed lowland is quite susceptible to climate change impacts, especially drought stress and incidence of pests and diseases. Anticipating climate change impacts in rainfed lowland are approached by applying adaptive technology as well as greenhouse gase mitigation. Some adaptive technologies which potentially increase rainfed rice productivity are new superior varieties, cropping calendar for determining planting time, water resources management with small water reservoir, and integrated pests and diseases control. Some mitigation technologies such as intermittent irrigation, high yielding varieties with low emissions, ameliorant materials use, balanced fertilization, and integrated food crop-livestock reduce effectively greenhouse gas emissions in rainfed lowland rice areas. Integrated food crops-livestock with zero waste systems is one of synergic efforts between adaptation and mitigation actions on climate change impacts in ecosystems of rainfed lowland rice.
Co-Authors A. Wihardjaka Adriani, Terry Ayu Arif Anshori, Arif Irfan Dwidya Prijambada Mujiyo Mujiyo N Ngadiman PRIHASTO SETYANTO Retno Rosariastuti Sutriadi, Mas Teddy Wihardjaka, Anicetus