scholarly journals PEMANFAATAN STEEL SLAG INDONESIA DI BIDANG PERTANIAN

2010 ◽  
Vol 12 (1) ◽  
pp. 36 ◽  
Author(s):  
Suwarno Suwarno
Keyword(s):  
Soil Amendment ◽  
Acid Soil ◽  
Peat Soil ◽  
Mineral Soil ◽  
Steel Slag ◽  
Paddy Rice ◽  
Growth And Yield ◽  
Liming Material ◽  
P Fertilizer ◽  
Better Than

Steel slag is by-product formed in the process of steel manufacturing. In Europe, USA, Japan, China, Korea, and Hawai steel slag has been utilized in agriculture as a liming material for improving acid soil or as Si source for paddy rice and sugar cane plants. Currently, Indonesia produces annually about 540,000 ton of electric furnace (EF) – one kind of steel slag; however none of this is being used in agriculture. Results of researches indicated that Indonesian steel slag could be utilized as a liming material, Si source, as well as peat soil amendment. As a liming material, effect of Indonesian steel slag on growth of plant was slightly better than those of calcite and dolomite. In combination with phosphatic guano, Indonesian steel slag increased effectiveness of phosphatic guano for direct application as P fertilizer. Phosphatic guano was significantly more effective when it was combined with steel slag than be combined with dolomite or calcite. As Si source for paddy rice plant, Indonesian steel slag improved growth and yield of paddy rice both grown on mineral soil containing low available Si on peat soil. The effect of Indonesian steel slag on paddy rice grown on peat soil was significantly better than that of on mineral soil. As peat soil amendment, Indonesian steel slag enhanced growth and bole volume of Acacia cracicarpa grown on peat soil. Keywords: agriculture, Indonesian steel slag, utilization

scholarly journals Comparison of Chemical Properties and Application as Acid Soil Amendment of Pretreatment Center Slag and Other Slags

2001 ◽  
Vol 2 (2) ◽  
pp. 8-17
Author(s):  
Suwarno . ◽  
Itsuo Goto ◽  
Hiroshi Masujima
Keyword(s):  
Soil Ph ◽  
Soil Amendment ◽  
Converter Slag ◽  
Acid Soil ◽  
Chemical Properties ◽  
Available P ◽  
Liming Material ◽  
Exchangeable Ca ◽  
P Fertilizer ◽  
Bf Slag

Chemical properties of Pretreatment center slag (PTC-slag) were analyzed and compared to those of converter slag (C slag) and blast furnace slag (BF slag). PTC slag had a high EC value as well as citric acid soluble P and contained more Ca, Si, P, K, and Na but less Mg and Fe than C slag. Compared to BF slag, PTC slag contained more Fe, Ca, Mg, P, Mn, and Na but less Si, Al, and K. Although neutralizing value of PTC slag was lower than that of C slag, its ability to neutralize soilacidity was markedly higher. A pot experiment using Andisol from Tochigi Prefecture and komatsuna plant was carried outto evaluate PTC slag as liming material as well as P fertilizer. PTC slag, C slag, and dolomite were applied as liming materials and combined with super phosphate (SP). Addition of SP of 2.5 and 5.0% phosphate absorption coefficient (PAC) to PTC slag significantly improved the yield of komatsuna.This result, however, only apply for PTC slag adjusting soil pH to 6.5. Addit~ono f the same dosage of SP to PTC slag adjusting soil pH to 7.5 did not give significant effect. On the other hand, addition of SP of 2.5 and 5.0% PAC to C slag or dolomite significantly improved the yield for both C slag ordolomite adjusting. the soil pH to 6.5 and 7.5. Results of the experiment also indicated that P'TC slag and C slag significantly increased soil pH; exchangeable Ca, and Mg and improved available P, B, and Mn in Andisol. The magnitudes ofthese effects of the two slags, however, were difference. As compared to C slag and dolomite, PTC slag increased lower exchangeable Mg but higher available P. These results suggest that for acid soil amendment, PTC slag was better than dolomite and C slag due to the fact that this material supplymore P and B. Application of PTC slag as acid soil amendment will reduce the demand of P fertilizer, and even in high dosage can meet the P demand of komatsuna plant.

scholarly journals Solubility of Rock Phosphate and its Effect to the Growth and Yield of Maize on Ultisols

2008 ◽  
Vol 13 (1) ◽  
pp. 11-22
Author(s):  
Antonius Kasno ◽  
Diah Setyorini ◽  
Sutisni Dwiningsih
Keyword(s):  
Rock Phosphate ◽  
Acid Soil ◽  
Block Design ◽  
Soil Samples ◽  
Growth And Yield ◽  
Content Increase ◽  
Rock Phosphates ◽  
Maize Growth ◽  
P Content ◽  
P Fertilizer

Phosphor is a macro nutrients and it becomes the main limiting factor for maize growth on Ultisols. Rock phosphate is one of P fertilizer sources contains high P and Ca content, slow release and soluble under acid condition, suitable for acid soil. The objective of this research is to study the solubility of rock phosphate and its influence to the growth and yield of maize on Ultisols.  This research was conducted in the research laboratory and the green house of Indonesia Soil Research Institute (ISRI). Ultisols soil samples were taken from oil palm plantation in North Sumatera. Christmas Island Rock Phosphate (CIRP) and Tunisia rock phosphate was used in this research. There are two activity conducted simultaneously, which is application of rock phosphate on Ultisols under plant indicator and without plant. The experimental design is randomized complete block design with 5 treatments and 3 replications. The pot experiment without plant was conducted using1 kg of soil sample mixed with rock phosphate treatment and placed into plastic plot.  During 3 months of incubation, soil water content was maintained under field capacity by aquadest.  The dosages of P fertilizer were 0, 157.6 and 315.2 kg P2O5 ha-1. Soil samples were taken on 1, 2, and 3 months after P fertilization for measuring pH, P content (by HCl 25 %, Bray 1 and Olsen extraction), P-inorganic fractionation (Al-P, Fe-P, Rs-P and Ca-P), exchangeable acidity (Al and H), Al and free of Fe oxide. The pot experiments with maize were conducted using 7.5 kg soil samples mixed with 2 different rock phosphates as a treatment. The dosages of rock phosphate were similar with experiment 1. Urea 300 kg and 150 kg KCl ha1 were applied as a basal fertilizer. Maize was planted two seed per pot and maintain until harvest time. The result of the research shows that soil P content increase with RP application, Tunisia rock phosphate give higher response than the CIRP. Direct application of rock phosphate with Fe and Al content did not increase significantly the Aldd, Al2O3 and Fe2O3 content on soil.  Application of CIRP and Tunisia rock phosphate increased maize growth and yield significantly.

scholarly journals PENGARUH INOKULASI CAMPURAN ISOLAT BAKTERI PELARUT FOSFAT INDIGENUS RIAU TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN KEDELAI (Glycine max L. Merr)

2017 ◽  
Vol 7 (1) ◽  
pp. 7
Author(s):  
LUFITA NUR ALFIAH ◽  
DELITA ZUL ◽  
NELVIA NELVIA
Keyword(s):  
Peat Soil ◽  
Mineral Soil ◽  
Biosphere Reserve ◽  
Dry Weight ◽  
Growth And Yield ◽  
Soluble Phosphate ◽  
Sterile Soil ◽  
Highest Weight ◽  
Randomized Design ◽  
Glycine Max L

At this time the oportunity increasing soybean production still open through optimize the fulfill of the nutrient of plants. Phosphorus is one of element nutrient essentiality macro those as very important to growth and development of plants. The existence it in land abundance, but the concentration P who are get reserve by plant is very low. At acid land P bunching aluminum (AI) and iron (Fe) meanwhile in land Alkhalin P bounded calsium (Ca). The increasing efesiency of supply fosfat at plant can effort with exploit microorganism soluble phosphate group. Test potential solubility P by BPF isolated from peat soil Biosphere Reserve Giam Siak Kecil Bukit Batu, Riau. Test was conducted and taken in semi-quantitative which able to dissolve Ca3 (PO4) 2, FePo4 and phosphate rock. However adaptability and potential dilution BPF origin peat soils of Riau indigenus inoculated soybean in mineral soil until now unknown. This research was conducted in order to determine the effect of inoculation BPF indigenus Riau toward growth and yield of soybean. The study was conducted in factorial experiment using completely randomized design (RAL Factorial), as the first factor is soil treatment consisting of two levels ie: T0: soil without sterilization, T1: sterilized soil. The second factor is the provision isolates BPF which consists of 4 levels, namely: B0: without inoculation, B1: 2 isolates BPF (BB_UB6 and BB_K9), B2: 3 isolates BPF (BB_UB6, BB_K9 and BB_K2), B3: 4 isolates BPF (BB_UB6, BB_K9, BB_K2, and BB_HS13). The results showed soil sterilization decrease the number of primary branch becomes 5.67 and 1.49 g dry weight of the plant. The fastest time of harvest occurs in plants without inoculation of sterile soil that is 78.78. The highest weight of 100 seeds produced by the plant without inoculation of sterile soil that is 13.17 g.

scholarly journals Response of soybean (Glycine max L.) to application of lime and phosphate fertilizer in an acid soil of western Kenya

2020 ◽  
Vol 5 (4) ◽  
pp. 470-475
Author(s):  
Peter Asbon Opala
Keyword(s):  
Glycine Max ◽  
Significant Interaction ◽  
Soil Acidity ◽  
Acid Soil ◽  
Dry Weight ◽  
Phosphate Fertilizer ◽  
Western Kenya ◽  
P Fertilizer ◽  
Glycine Max L ◽  
Better Than

The effect of combining lime and phosphate fertilizer on the performance of soybean (Glycine max L.) was investigated in a pot experiment consisting of nine treatments of three rates of lime (0, 4 and 8 t ha−1) in a factorial combination with three rates of phosphorus (0, 15, and 30 kg P ha−1) at Maseno University in western Kenya. There was a significant interaction between the lime and phosphorus rate on the biomass dry weight of soybean. At the rates of 0 and 4 t ha-1 of lime, the biomass dry weight of soybean increased with increasing rates of phosphorus but at 8 t ha-1 of lime, the dry weight of soybean increased from 0 to 15 kg P ha-1 but declined at 30 kg P ha-1. There was however no significant interaction between lime and P rates on grain weight but the effects of both P and lime rate were significant. When applied without lime, 30 kg P ha-1 gave significantly higher grain (5.3 g pot-1) weight than 15 kg P ha-1 (1.6 g pot-1) of soybean, which was also significantly better than the control (0.0 g pot-1). When applied without phosphorus, both lime rates at 4 and 8 t ha−1 significantly increased grain weights of soybean compared to the control, but the grain weights of soybean between the two lime rates did not differ significantly. The highest yields of soybean were obtained when 4 t ha−1 of lime was applied with 30 kg P ha−1 (19 g pot-1). Therefore, this study demonstrates that the ameliorating deleterious effects of soil acidity through liming should simultaneous be accompanied by application of P fertilizer at appropriate rates.

PROPERTIES IMPROVEMENT AND HYDROPHOBICITY PREVENTION OF PEAT SOIL IN OIL PALM PLANTATION THROUGH STEEL SLAG APPLICATION

2016 ◽  
Vol 24 (1) ◽  
pp. 39-46
Author(s):  
Winarna Winarna ◽  
Iput Pradiko ◽  
Muhdan Syarovy ◽  
Fandi Hidayat
Keyword(s):  
Soil Ph ◽  
Oil Palm ◽  
Water Retention ◽  
Peat Soil ◽  
Steel Slag ◽  
Field Capacity ◽  
Ash Content ◽  
Oil Palm Plantation ◽  
Randomized Design ◽  
Four Levels

Development of oil palm plantation on peatland was faced with hydrophobicity problem caused by over drained. Hydrophobicity could reduce water retention and nutrient availability in the peat soil. Beside of proper water management application, addition of soil ameliorant which contain iron could increase stability and improve peat soil fertility. The study was conducted to obtain the effect of steel slag on peat soil properties and hydrophobicity. In this study, peat soil was incorporated with steel slag and incubated in 60 days period. The research was employed completely randomized design (CRD) factorial 2 x 2 x 4. First factor is peat maturity consists of two levels: sapric (S) and hemic (H), while the second factor is soil moisture which also consist of two levels: field capacity (W1) and dry (under the critical water content) (W2). The third factor is steel slag dosage which consist of four levels: 0 g pot (TB0), 7.17 g pot (TB1), 14.81 g -1 -1 pot (TB2), and 22.44 g pot (TB3). The result showed that application of steel slag significantly increase of soil pH, ash content, and water retention at pF 4.2. Furthermore, application of steel slag significantly reduce time for water reabsorption (wettability) in sapric. On the other hand, there are negative corellation between water penetration and soil pH, ash content, and water retention at pF 4.2. Overall, application of steel slag could increase wettability and prevent peat soil hydrophobicity.

Deinking sludge influences biomass, nitrogen and phosphorus status of several grass and legume species

1997 ◽  
Vol 77 (4) ◽  
pp. 693-702 ◽  
Author(s):  
A. Fierro ◽  
J. Norrie ◽  
A. Gosselin ◽  
C. J. Beauchamp
Keyword(s):  
Soil Amendment ◽  
Mineral Soil ◽  
Nitrogen And Phosphorus ◽  
Agropyron Elongatum ◽  
Festuca Ovina ◽  
Melilotus Officinalis ◽  
Medicago Lupulina ◽  
Wide Range ◽  
Galega Orientalis ◽  
Four Levels

In a greenhouse study, deinking sludge was evaluated as a soil amendment supplemented with four nitrogen (N) fertilization levels for the growth of the grasses Agropyron elongatum (Host.) Beauv. (tall wheatgrass), Alopecurus pratensis L. (meadow foxtail), Festuca ovina var. duriuscula (L). Koch (hard fescue), and four levels of phosphorus (P) for the growth of the legumes Galega orientalis Lam. (galega), Medicago lupulina L. (black medic), Melilotus officinalis (L.) Lam (yellow sweet clover). Fertilizers were applied on the basis of sludge level to maintain uniform carbon (C)/N or C/P ratios across sludge treatments. In one experiment, sand was mixed with 0, 10, 20 or 30% sludge while, in a second experiment, mineral soil was mixed with 0, 27, 53 or 80% sludge (vol/vol). In sand mixtures of 30 and 20% sludge, grasses had similar or greater growth than in unamended mineral soil when N was added at about 6.5 and 8.4 g kg−1 deinking sludge, respectively. For all legumes but Medicago lupulina, P at about 0.8 g kg−1 sludge was required for these sand mixtures. In soil mixtures of 53 and 27% sludge, grasses grew well when supplemental N was about 5.3 and 6.9 g kg−1 sludge, respectively. Legumes required P at 0.5 and 1.2 g kg−1 sludge, respectively. In general, growth was closely related to total amount of added N or P in spite of the wide range of C/N or C/P ratios. When growing in media amended with sludge, grasses needed higher tissue N concentration for an equivalent growth than in control soil; legumes had similar tissue P concentration. The grasses Agropyron elongatum and Alopecurus pratensis as well as the legumes Melilotus officinalis and Galega orientalis are promising species for field testing, based on dry matter production. Deinking sludge can be used as soil amendment when adequate N and P supplements are provided. Key words: Soil amendment, papermill sludge, Agropyron elongatum, Alopecurus pratensis, Festuca ovina, Medicago lupulina, Galega orientalis, Melilotus officinalis

PENGARUH JENIS MULSA DAN PUPUK GANDASIL-B TERHADAP PERTUMBUHAN DAN HASIL TANAMAN CABAI RAWIT (Capsium frustescens L.) PADA TANAH GAMBUT PEDALAMAN (The Effect of Mulch Type and Gandasil-B Fertilizer on The Growth and Yield of Chili Pepper (Capsicum fr

AgriPeat ◽  
2019 ◽  
Vol 18 (01) ◽  
pp. 1-9
Author(s):  
Admin Journal
Keyword(s):  
Block Design ◽  
Peat Soil ◽  
Chili Pepper ◽  
Growth And Yield ◽  
Plastic Mulch ◽  
Randomized Block Design ◽  
Different Types ◽  
Split Plot ◽  
Main Plot ◽  
Black Plastic

                                                                                                                                       ABSTRACTThis research was aimed to investigate the effect of mulch type and gandasil-B fertilizer on the growth and yield of chili pepper (Capsicum frutescens L.) on inland peat soil. The method used in this research was two-factor Randomized Block Design with split plot arrangement and three replications. The main plot was the mulch type which consists of three treatments, namely: control, cogon grass and silver-black plastic mulch, and as sub plot was the dose of gandasil-B which consists of four 4 levels, namely: 0, 1, 2, and 3 g L-1 water. Results showed that the interaction between different types of mulch and gandasil-B fertilizer only had significant effect on the diameter of the stem, the number of productive branch, the number of fruit per plant, and the weight of fruit per plant. The utilization of silver-black plastic mulch and gandasil- B fertilizer at the concentration of 3 g L-1 water showed more number of productive branch (14.00 branches) and number of fruit (151.17 fruits) per plant and the weight of fruit (166.52 g) per plant was significantly higher.Keywords : Mulch, cogon grass, silver-black plastic, Gandasil-B, inland peat soil                                                                                                                                       ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh jenis mulsa dan pupuk gandasil-B terhadap pertumbuhan dan hasil tanaman cabai rawit (Capsicum fruestescens L.) pada tanah gambut pedalaman. Percobaan ini menggunaakan Rancangan Acak Kelompok (RAK) disusun secara split plot dengan dua faktor perlakuan dan tiga ulangan. Sebagai petak utama, yaitu jenis mulsa terdiri dari tiga jenis, yaitu : kontrol, mulsa alang-alang dan mulsa plastik hitam perak. Sebagai anak petak adalah dosis pupuk Gandasil-B terdiri dari 4 taraf perlakuan, yaitu : 0, 1, 2 dan 3 g L-1 air. Hasil penelitian menunjukkan bahwa interaksi penggunaan jenis mulsa dengan pupuk gandasil-B hanya berpengaruh nyata terhadap diameter batang, jumlah cabang produktif, jumlah buah per tanaman dan berat buah per tanaman. Penggunaan mulsa plastik hitam perak dan pupuk gandasil-B 3 g L-1 air diperoleh jumlah cabang produktif (14.00 cabang) dan jumlah buah (151.17 buah) per tanaman) nyata lebih banyak dan berat buah (166.52 g) per tanaman nyata lebih tinggi.Kata kunci : Mulsa, alang-alang, plastik hitam perak, pupuk gandasil-B, gambut pedalaman

Direct seeding of PinusSylvestris using microsite preparation and invigorated seed lots of different quality: 2-year results

1994 ◽  
Vol 24 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Hans Winsa ◽  
Urban Bergsten
Keyword(s):  
Seed Quality ◽  
Seedling Survival ◽  
Seedling Emergence ◽  
Mineral Soil ◽  
Direct Seeding ◽  
Growing Seasons ◽  
Humus Layer ◽  
Negative Effect ◽  
Mean Germination Time ◽  
Better Than

Direct seeding of Pinussylvestris L. is a regeneration method, with potential for development considering scarification, microsite preparation, seed invigoration, and seed quality. Three seed lots of different quality concerning seed weight, germination percent, and mean germination time were used on two sites in northern Sweden. Microsite preparation, 2 cm deep pyramidal indentations, of the mineral soil improved seedling emergence on the two sites by 48 and 62%, respectively, compared with seeding without preparation other than removal of the humus layer. Microsite preparation in combination with invigorated seed, i.e., seed incubated at 30% moisture content for 7 days at 15 °C, resulted in seedling emergence of about 85% for the highest and about 50% for the lowest seed quality at both sites. Noninvigorated seed, seeded without microsite preparation, reached about 55% for the highest and 22% at one and 43% at the other for the lowest seed quality. Without microsite preparation there was no, or a negative, effect of seed invigoration on seedling emergence. Seedling survival after the first winter improved significantly with better seed quality. Survival averaged 92 and 72% at the two sites, with frost heaving causing most mortality. Seedlings from invigorated and redried seed survived better than seedlings from untreated seed. Seedlings from the best seed quality had higher values in seedling height, about 35%, shoot length, about 60%, and needle length, about 30%, after two growing seasons than seedlings from lower seed qualities. Invigoration and microsite preparation had no effect on measured growth characteristics.

The Experimental Study on Grinding Properties of Gas Quenching Steel Slag

2011 ◽  
Vol 189-193 ◽  
pp. 612-617
Author(s):  
Hong Wei Xing ◽  
Yue Long ◽  
Xiu Li ◽  
Gao Liang Li ◽  
Yu Zhu Zhang ◽  
...  
Keyword(s):  
Specific Surface ◽  
New Technology ◽  
Steel Slag ◽  
Economic Benefits ◽  
Surface Areas ◽  
Mineral Phases ◽  
Quenching Process ◽  
Gas Quenching ◽  
Specific Surface Areas ◽  
Better Than

A gas quenching process to deal with steel slag and its characteristics of the new technology was briefly introduced. The grinding characteristics, mineral phases of gas quenching steel slag and the potential economic benefits of using it as cement mixing material was studied by compared to heat-stew steel slag. The results indicated that the specific surface areas (S) and grinding times (t) of the gas quenching steel slag showed a first order exponential decay relationship. With the extension of time, the specific surface areas of heat-stew steel slag was tending to balance earlier than that of gas quenching steel slag; The energy consumption of gas quenching steel slag was much lower than that of heat-stew steel slag. Gas quenching steel slag was comprised of C2S, C3S, a certain amount of (Ca2(Al, Fe)2O5）and RO phase, but the content of RO phase was relatively low, which increased the grindability of the quenching steel slag, so that the grindability of gas quenching steel slag was much better than that of heat-stew steel slag. Gas quenching steel slag prepared for cement addictives would bring great economic benefits.

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