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Pupuk organo-kimia untuk pemupukan bibit kelapa sawit Organo-chemical fertilizer for oil palm seedling fertilization Laksmita Prima SANTI; Didiek Hadjar GOENADI
Menara Perkebunan Vol. 76 No. 1: 76 (1), 2008
Publisher : INDONESIAN OIL PALM RESEARCH INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iribb.jur.mp.v76i1.94

SummaryThe availability of high quality and quantity of oil palm seedling needs consistent support of fertilization programs for economic production. Organo-chemical fertilizer with rock phosphate and urea added was initiated to increased economic value of agriculture and estate crops residues. The prototype of organo-chemical fertilizer has 10% organic C, 11% N, 8% P, 1% K and 4% humic acid respectively. Based on greenhouse experiments, organo-chemical fertilizer treated to oil palm seedlings tends to provide a better vegetative growth of the seedlings. Dry weights of leave, stem, and root of the seedlings applied with 100 g organo-chemical fertilizer plus 10 g KCl to each seedling were significantly different compared to the standard dosage conventional fertilizer. This organo-chemical fertilizer could be applied as conventional fertilizer substitute.Ringkasan Ketersediaan bibit kelapa sawit ber-kualitas dengan kuantitas yang terus meningkat memerlukan dukungan program pemupukan yang konsisten untuk mencapai tingkat produksi yang ekonomis. Pembuatan pupuk organo-kimia dengan penambahan batuan fosfat dan N ditujukan untuk meningkatkan nilai ekonomi limbah pertanian dan perkebunan. Prototipe pupuk organo-kimia ini mengandung 10% C-organik, 11% N, 8% P, 1% K dan 4% asam humik. Pemberian 100 g pupuk organo-kimia yang ditambah 10 g KCl per bibit menghasilkan berat kering daun, batang, dan akar yang lebih baik dan berbeda nyata apabila dibandingkan dengan peng-gunaan pupuk konvensional dosis standar. Berdasarkan hasil tersebut, prototipe pupuk organo-kimia ini dapat digunakan sebagai substitusi pupuk konvensional untuk pemupuk-an bibit kelapa sawit.

Potensi Pseudomonas fluorescens strain KTSS untuk bioremediasi merkuri di dalam tanah The Potential use of Pseudomonas fluorescens KTSS strain formercury bioremediation in the soil Laksmita Prima SANTI; Didiek Hadjar GOENADI
Menara Perkebunan Vol. 77 No. 2: 77 (2), 2009
Publisher : INDONESIAN OIL PALM RESEARCH INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iribb.jur.mp.v77i2.100

AbstractHeavy metals are widespread pollutants insoil and become environmental concern as theyare non-degradable and highly persistent. Solidand/or liquid wastes containing toxic heavymetals may be generated in various industrial ormining processes. A heavy metal resistantbacterium may be present in the soil and miningsite. As they already preconditioned by abundantheavy metals contaminant, the use of thesebacterium is assumed to be effective in improvingmetals reduction. To obtain bacterial isolateshighly capable of mercury (Hg) reduction,isolation activities have been conducted atselected sites of mining locations in SouthSumatera. The highly potential bacteriapossessing mercury reducing capability has beenisolated from this site i.e. Pseudomonasfluorescens KTSS strain. Inoculating of 25%(v/w) suspension of P. fluorescens KTSS strain insoil material added 5000 ppb of mercury, couldreduced about 53.3% of mercury soil contents.Best vegetative growth performance of cocoaseedlings was shown by the application of 15-15-15 NPK conventional fertilizers in combinationwith the addition of 1.6 – 3.25 g of P. fluorescensKTSS bio-ameliorant/seed. A Greenhouseexperiment results of cocoa seedlings were inconcordance with those obtained from field trialsof paddy.AbstrakLogam berat merupakan jenis polutan yangterdistribusi secara luas di dalam tanah danmendapat perhatian secara khusus karena sifatnyayang tidak dapat terdegradasi serta dapat bertahanlama di dalam lingkungan. Limbah padatdan/atau cair yang dihasilkan dari berbagai prosesindustri dan pertambangan mengandung logamberat toksik. Jenis bakteri yang resisten terhadaplogam berat mungkin berada di dalam tanah dandi lokasi tambang. Apabila bakteri tersebut dapatberadaptasi pada lingkungan dengan tingkatkontaminasi logam berat yang tinggi, makadiasumsikan bahwa penggunaan bakteri tersebutsangat efektif dalam meningkatkan reduksi logamberat. Untuk memperoleh isolat bakteri yangmemiliki kemampuan mereduksi merkuri (Hg),maka satu rangkaian kegiatan isolasi telahdilakukan di lokasi tambang terpilih di SumateraSelatan. Bakteri potensial pereduksi merkuri yangtelah diisolasi dari lokasi ini diidentifikasisebagai Pseudomonas fluorescens strain KTSS.Inokulasi sebanyak 25% (v/b) suspensi P. fluore-scens strain KTSS ke dalam bahan tanah yangtelah ditambah dengan 5000 ppb merkuri, dapatmereduksi sekitar 53,3% kandungan merkuri didalam tanah. Pertumbuhan terbaik dari bibitkakao diperoleh dari perlakuan pupuk NPK 15-15-15 yang dikombinasikan dengan 1,6 – 3,25 gbioamelioran P. Fluorescens strain KTSS/bibit.Pengujian bioamelioran P. fluorescens strainKTSS di lapang pada tanaman padi memberikanpola keefektifan yang sama dengan hasilpengujian terhadap bibit kakao yang dilakukan dirumah kaca.

Potensi fungi pelapuk putih asal lingkungan tropik untuk bioremediasi herbisida The potential white-rot fungi native of tropical environment for herbicides bioremediation Laksmita Prima SANTI; Lisdar Idwan SUDIRMAN; Didiek Hadjar GOENADI
Menara Perkebunan Vol. 75 No. 1: 75 (1), 2007
Publisher : INDONESIAN OIL PALM RESEARCH INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iribb.jur.mp.v75i1.153

SummaryFungal treatment by using white-rot fungito reduce a wide variety of herbicide com-pounds is a specialized bioremediation pro-cess. A laboratory experiment was conductedto determine the ability of Phanerochaetechrysosporium, Ceriporiopsis subvermispora,and Pleurocybella porrigens and seven white-rot fungi isolated from a native of tropicalenvironment to grow on yeast malt extractglucose (YMG) agar containing highconcentration of (I) 2,4-dichlorophenoxy aceticacid, (R) glyphosate, and (G) paraquat. Thedata indicated that P. chrysosporium couldgrow on YMG media containing 5000 ppm of(I) 2,4-D, whereas BPBPI 02/04 isolate onYMG 250 ppm of (R) glyphosate or (G)paraquat. Relative values of growth inhibitionof these fungi are 81.1; 27.8; and 50.0%respectively. Biodegradation capability ofherbicides by candidate inoculants in soil-sandmedia was also determined in greenhouseexperiment by using peanut, sorghum, corn,and Borreria alata as bio-indicators. Peanutand B. alata were found to be the bestresponsive seedlings as bio-indicator on thepresence of (I) 2,4-D herbicide in soil-sandmedia.RingkasanTeknologi bioremediasi dengan fungipelapuk putih (FPP) digunakan untuk me-reduksi sejumlah senyawa herbisida. Kegiatanpenelitian yang dilakukan di laboratoriumbertujuan untuk mengetahui kemampuan tum-buh Phanerochaete chrysosporium, Ceripo-riopsis subvermispora, dan Pleurocybellaporrigens serta tujuh isolat FPP yang diperolehdari lingkungan tropik secara in vitro padamedium agar yeast malt extract glucose(YMG) yang mengandung (I) 2,4-dikloro-fenoksi asam asetat, (R) glifosat, dan (G)parakuat konsentrasi tinggi. Dari data yangdiperoleh, diketahui bahwa Ph. chrysosporiummemiliki kemampuan tumbuh dalam mediumpadat YMG yang mengandung 5000 ppm (I)2,4-D dan isolat BPBPI 02/04 pada 250 ppm(R) glifosat dan (G) parakuat dengan nilaihambatan pertumbuhan relatif terhadap kontrol(HPR) masing-masing 81,1; 27,8; dan 50,0%.Pengujian isolat terpilih terhadap kemampuanmendegradasi herbisida di dalam mediumtanah dan pasir juga dilakukan di rumah kacadengan menggunakan kacang tanah, sorgum,jagung, dan Boreria alata sebagai bioindikator.Kacang tanah dan B. alata memberikan responterbaik terhadap keberadaan herbisida (I) 2,4-Ddi dalam medium tanah dan pasir .

BIO-SUPERPHOSPHATE (BIO-SP) APPLICATION ON SUGAR CANE (Saccharum officinarum L.) Goenadi, Didiek Hadjar; Santi, Laksmita Prima
AGRIVITA Journal of Agricultural Science Vol 35, No 1 (2013)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v35i1.190

The highest expense on sugarcane management is fertilization in which one of them is phosphate fertilizer produced by imported raw materials. An innovation was made by using the local phosphate deposits with low reactivity processed further to improve their effectiveness for sugarcane. The objective of this study was to investigate the growth, yield and quality of sugarcane as affected by bio-superphosphate (Bio-SP) application on a highly weathered tropical soil. A nine-month field experiment was conducted at Jatitujuh Sugar Mill area, West Java, Indonesia, comparing between sugarcane fertilized with Bio-SP to replace conventional single superphosphate (SP-36) and that fertilized with SP-36. Urea and MOP (Muriate of Potash) were applied at similar dosages as recommended by division of Jatitujuh Sugar Mill Agronomy Research. Bio-SP was formulated by reacting a Central Java Rock Phosphate with liquid culture supernatant (LCS) and phosphoric acid characterized by 33% total soluble P2O5, 23.1, and 10.7 % citric acid and water-soluble P2O5, respectively. The results indicated that Bio-SP at 50% dosage of SP-36 was as effective as the SP-36 in supporting sugarcane growth and improved yield up to 8% as crystal sugar. Further consequence of this finding is that the application of Bio-SP reduced 9.2% of fertilizer cost for sugarcane. Keywords: microbial enrichment, highly weathe-red soils, fertilizer efficiency

Aplikasi Bioaktivator SuperDec dalam Pengomposan Limbah Padat Organik Tebu Goenadi, Didiek Hadjar; Santi, Laksmita Prima
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 34 No. 3 (2006): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The development of a suitable technology for handling sugar cane plantation's solid organic waste especially bagasse, filter mud, and trash is one of the most important concerns in the management system of sugar cane plantation. Solid organic waste of sugar cane is potentially suitable as a compost raw material processed by introducing lingocellulosic-degrading microbes, particularly Phanerochaete chrysosporium, Trichoderma pseudokoningii, and Trichoderma sp. The microbes were formulated in a commercial bioactivator product namely SuperDec. The significant results have been obtained on biodegradation of trash composted by using this bioactivator. Compost maturity could be reached in 7-21 days of incubation indicated by the reductions of solid organic waste particle size and C/N ratio. Based on selected production component values of this trial, the production cost of trash-originated compost is Rp. 200,-/kg with nutrient value equivalent to Rp. 260,-/kg. Combined applications of the compost with NPK single or with NPK compound fertilizers yielded higher biomass production i.e. 28.5 and 13.3%, respectively, than that obtained from standard NPK single fertilizer application. Key words: Sugar cane plantation, solid organic waste, SuperDec, composting technology, C/N ratio, production cost

Evaluasi Aplikasi Biofertilizer EMAS pada Tanaman Jagung di Pelaihari, Kalimantan Selatan Santi, Laksmita Prima; Sumaryono, ,; Goenadi1, Didiek Hadjar
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 35 No. 1 (2007): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Implementation of national food safety program to increase food production still faces some constraints. The intensification program has resulted the marginal land to be fully dependent on chemical fertilizers, where leveling-off production has occurred. Low organic matter content as a source of microbial feed and energy decreased the activity of soil microbes. Efficiency of fertilization on marginally suitable soils might be achieved by the application of biofertilizer. Enhancing Microbial Activities in the Soils (EMAS) is a biofertilizer consisting of non-symbiotic N-fixing bacteria, phosphate-solubilizing microbes, and aggregate stabilizing microbes. This experiment was initiated to evaluate the effectiveness of EMAS bio-fertilizer in reducing the dosage of conventional fertilizers used in corn at Pelaihari, South Kalimantan. Based on the current production value and total of cost production, reducing 25, 50 and 75% conventional fertilizer provided the planters with 1.44, 1.13, and 1.12 revenue cost ratio. Yield of dry grain of corn was higher (+41.8%) by application of 75% standard dosage and 1 gram EMAS biofertilizer/plant (53.3 kg/ha) than by standard dosage of conventional fertilizer. Key words: bio-fertilizer EMAS, corn, evaluation, pelaihari

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