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Dermiyati
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Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro No. 1, Bandarlampung 35145, Indonesia
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INDONESIA
Journal of Tropical Soils
Published by Universitas Lampung
ISSN : 0852257X     EISSN : 20866682     DOI : http://dx.doi.org/10.5400/jts.v25i1
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Journal of Tropical Soils (JTS) publishes all aspects in the original research of soil science (soil physic and soil conservation, soil mineralogy, soil chemistry and soil fertility, soil biology and soil biochemical, soil genesis and classification, land survey and land evaluation, land development and management environmental), and related subjects in which using soil from tropical areas.
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Konservasi Alam dan Lahan
Articles 817 Documents
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Water Table Fluctuation in Tidal Lowland for Developing Agricultural Water Management Strategies Momon Sodik Imanudin; Edi Armanto; Robiyanto Hendro Susanto; Siti Masreah Bernas
JOURNAL OF TROPICAL SOILS Vol 15, No 3: September 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i3.277-282

Abstract

Water Table Fluctuation in Tidal Lowland for Developing Agricultural Water Management Strategies (MS Imanuddin, E Armanto, RH Susanto and SM Bernas):The research objective is to evaluate the water status in the tertiary block of tidal lowland for developing water management strategies and cropping pattern for food crop agriculture. The research was conducted in tidal lowland reclamation areas of Delta Saleh South Sumatera. The methodology used in this research was survey and monitoring. The result showed that the study area has a potential of acid sulphate soil which is indicated by phyrite layer at 60 cm below the soil surface. Variation of water table was very high in the range of 0-2 cm at rainy season and it was drop up to 90 to 100 cm below soil surface at dry season. This conditions result in the soil oxidation and the pH drop up to 2.5-3.5 (very acid). Analysis of water surplus and deficit during one year period was calculated by surplus excess water under 30 cm (SEW-30) and showed that the area study was experienced water deficit. Analysis of groundwater effect on soil moisture content showed that the critical water level was in 60 cm below soil surface. The soil moisture content at this point in the root zone was dropped into the wilting point level. It means that the water availability for crop water requirement is inadequate. For sustainable agriculture in the area study, the water table should be maintained in 50-60 cm below soil surface. Therefore, the recommendation of water management strategies in the study area is water retention in combination with control drainage system.
Soil Microbial Biomass Carbon under Rhizosphere and Non- Rhizosphere of Maize after a Long-Term Nitrogen Fertilization and Tillage Systems . Dermiyati; Eva Firdaus; Muhajir Utomo; Mas Achmad Syamsul Arif; Sutopo Ghani Nugroho
JOURNAL OF TROPICAL SOILS Vol 16, No 1: January 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i1.63-68

Abstract

This research aimed to study the soil microbial biomass carbon (SMBC) under maize plant after a long-term application of nitrogen fertilizer and tillage systems (at the 37th growing season). The treatments were arranged in a factorial (3x3) in a randomized completely block design with 3 replications. The first factor was tillage systems, namely intensive tillage (IT) system, minimum tillage (MT) system, and no tillage (NT) system, and the second factor was the long-term application of nitrogen fertilizer, namely 0, 100, and 200 kg N ha-1. Data were analyzed using an orthogonal contrast test and a correlation test between SMBC and organic-C, total-N, and pH of the soil. The results showed that, in the rhizosphere and non-rhizosphere of maize plant, MT system increased the SMBC compared to NT and IT systems. However, application of long-term application of nitrogen fertilizer did not increase the SMBC. Nevertheless, fertilizer application of 100 kg N ha-1 increased the SMBC compare to 200 kg N ha-1.Furthermore, the combination of MT system and 100 kg N ha-1 could increase the SMBC compared to the other combined treatment between tillage systems and N fertilization doses. The SMBC was higher in the rhizosphere than in non-rhizosphere of maize plant.Keywords: Non-rhizosphere, rhizosphere, soil microbial biomass carbon, tillage systems
Evaluation for the Potential Use of Silicate Rocks from FourVolcanoes in Indonesia as Fertilizer and Soil Ameliorant Joko Priyono; Raden Sutriono; Zaenal Arifin
JOURNAL OF TROPICAL SOILS Vol 14, No 1: January 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i1.1-8

Abstract

Silicate rocks, the abundant plant nutrient source in Indonesia, have not been evaluated for use as a fertilizer/and soil ameliorant. This research was aimed to identify (1) mineral and elemental compositions of silicate rocks originated from Galunggung, Kelud, Tambora, and Rinjani Volcanoes and (2) soil properties determining dissolution rate of plant nutrients from the silicate rock fertilizers (SRFs). The rocks were ground with a ball mill for 10 min providing SRFs with medians of particle size of 30 – 50 mm. Each SRF was added to 6 soils from West Java, East Java, and Lombok Island at a rate equivalent to 20 t ha-1, incubated for 28 days in a laboratory condition.  Results indicate that adding SRFs clearly increased soil pH with negligible effect on soil salinity. Adding SRFs also increased quantity of citric-oxalic-extractable plant nutrients (Ca, K, Zn, and Cu) and activity of soil micro-organisms. Dissolution of plant nutrients from the SRFs in the soils was mainly determined by combination factors of C-organic content and pH of soils before application of the SRFs. It was concluded that SRFs originated from those volcanoes may be used as a plant-multi nutrient source and a remedial agent for acidic and biologically degraded soils. However, the true effectiveness of SRFs for those uses needs to be further tested under various soil-plant systems.
Assessing Biodegradation Susceptibilities of Selected Petroleum Hydrocarbons at Contaminated Soils Markus Heryanto Langsa
JOURNAL OF TROPICAL SOILS Vol 15, No 1: January 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i1.39-47

Abstract

Assessing Biodegradation Susceptibilities of Selected Petroleum Hydrocarbons at Contaminated Soils (M.H. Langsa): The susceptibility to biodegradation of selected saturated hydrocarbons (SHCs), polycyclic aromatic hydrocarbons (PAHs) and asphaltenes in a Barrow crude oil and extracts isolated from soils contaminated with the Barrow crude oil at day 0 and 39 was determined. Soil samples were contaminated with a Barrow crude oil across the surface (5% w/w) as part of a mesocosm experiment in order to mimic similar conditions in the environment.  The extent of biodegradation of the Barrow oil extracted from the contaminated soils at day 0 and day 39 was assessed by GC-MS analyses of SHCs and PAHs fractions. Changes in the relative abundances of n-alkanes (loss of low-molecular-weight hydrocarbons) and pristane relative to phytane (Pr/Ph) and their diastereoisomers were determined. Changes in the diastereo-isomer ratios of Pr and Ph relate to the decrease in abundance of the phytol-derived 6(R),10(S) isoprenoids with increasing biodegradation. The percentage change in abundances of each of selected alkylnaphathalenes with time (day 0 to 39) was determined, enabling an order of susceptibility of their isomers to biodegradation. It was established that the 2-methylnaphthalene isomers (2-MN) is more susceptible to microbial attack than 1-MN isomer indicated by decreasing in percent abundance from day 0 to 39 for the 2-MN isomer. The GC-MS analyses of the original Barrow oil indicated the oil had not undergone biodegradation. When this oil was used in the soil mesocosm experiments the oil was shown to biodegrade to about a level 2 -3 based on the biodegradation susceptibility of the various SHCs and PAHs described above.
The effect of NPK Compound (6:16:7) on Chemical Soil Properties of Thapic Epiaquands and Cucumber Yield . Sukristiyonubowo; Ibrahim Adamy Sipahutar; Ishak Achmad
JOURNAL OF TROPICAL SOILS Vol 14, No 3: September 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i3.229-238

Abstract

The effect of NPK compound (6:16:7) on chemical soil properties of Thapic Epiaquands, growth and yield of cucumber (Cucumis sativus) has been studied in Punthuk Rejo Village, Karanganyar District. The aims were to study the influence of NPK fertiliser on chemical soil properties, growth and yield of cucumber. The treatments were arranged in Randomized Complete Block Design and replicated three times. The treatments were rate of NPK fertilisers including  control, NPK standard, 150 kg NPK compound (6:16:7)  ha-1, 300 kg NPK compound (6:16:7)  ha-1, 450 kg NPK compound (6:16:7) ha-1, 600 kg NPK compound (6:16:7)  ha-1, 300 kg NPK compound (6:16:7) ha-1 + ¼ NPK standard, and 300 kg NPK compound (6:16:7) ha-1 + ½ NPK standard. The NPK standard originated from single fertiliser, namely urea, SP-36 and KCl, while the NPK compound was Agrotop, containing 6.15% N, 16.23% P2O5 and 6.87% K2O following named NPK compound (6:16:7). The rate of NPK standard was 100 kg urea ha-1, 100 kg SP-36 ha-1 and 200 kg KCl ha-1 referring to the local recommended fertiliser rate. Application of NPK, both NPK (6:16:7) and NPK Standard, improved the chemical soil properties, namely N, P and K total as well available P. So far, application of 300 kg NPK compound ha-1 significantly increased the number of cucumber fruits and cucumber yield. Compared to the control, the increases were 13% and 44% for the number of cucumber fruits and cucumber yield, respectively. So far, combination of NPK compound (6:16:7)  at the rate of 300 kg ha-1 with half recommended rate of NPK standard yielded a significant effect on both the number of cucumber fruits and weight of cucumber. These improvements were comparable to the NPK standard under fully recommended rate. The relative agronomic effectiveness value of combination of NPK (6:16:7) at the rate of 300 kg ha-1 with half recommended rate of NPK standard were about 100%, similar with the value of NPK standard. The economic analysis indicated that NPK standard with recommended application rate and combination of NPK Agrotop at the rate of 300 kg ha-1 with half recommended rate of NPK standard gave high benefit, B/C ratio and IBCR. The B/C ratio and IBCR were higher than one.
Changes in Soil Available Phosphorus, Leaf Phosphorus Content and Yield of Sword Bean (Canavalia ensiformis (L.) DC.) by Application of SP-36 and Phosphate Rock on Acid Upland Soil of East Lampung Achmad Arivin Rivaie
JOURNAL OF TROPICAL SOILS Vol 20, No 1: January 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i1.29-36

Abstract

A glasshouse trial was performed to determine changes in phosphorus (P) nutrition and the yield of sword bean (Canavalia ensiformis (L.) DC.) following the application of different rates and types of P fertilizer in an acid upland soil of East Lampung. Two different types of P fertilizer, namely SP-36 (total P = 36%) and Phosphate Rock (PR) (total P = 24.3%, particle size distribution = 75% <0.25 mm, 85% < 0.50 mm, 90% < 1.00 mm) were used in the trial. For the treatment, each P fertilizer type consisted of four rates (0, 50, 100 and 150 mg P2O5 kg-1 soil) that were arranged in a Completely Randomized Design with four replications. The results showed that the application of P fertilizers had significant effects on soil pH, soil plant-available P, the potential-P (HCl 25%), leaf N and P concentrations, the yield of sword bean. Increased rates of both forms of P fertilizer increased the soil pH values. As the soil used had low pH and very high exchangeable Al, hence, this result is most probably related to the addition of Ca2+ to the soil solution that resulted from the P fertiliser applied (liming effect), either from SP-36 (monocalcium phosphate) or PR (flour apatite). There was no difference in soil available P concentration due to the different in P fertilizer types, indicating that 4 months after the fertilizer application, the relatively insoluble Phosphate Rock had the same P solubility with SP-36. Increased rates of both forms of P fertilizer increased the sword bean yield. For the application of 0 kg P2O5 ha-1, although sword bean crops had pods, but, they did not give any seed. Whereas, at the addition of P fertilizer at the rate of 50, 100, and 150 kg P2O5 ha-1 for both P fertilizer types, the crops were able to give the seeds in the pods. [How to Cite: Achmad AR. 2015. Changes in Soil Available Phosphorus, Leaf Phosphorus Content and Yield of Sword Bean (Canavalia ensiformis (L.) DC.) by Application of SP-36 and Phosphate Rock on Acid Upland Soil of East Lampung. J Trop Soils 19: 29-36. Doi: 10.5400/jts.2015.20.1.29][Permalink/DOI: www.dx.doi.org/10.5400/jts.2015.20.1.29]
Relationship between Soil Health Assessment and the Growth of Lettuce . Riwandi; Merakati Handajaningsih
JOURNAL OF TROPICAL SOILS Vol 16, No 1: January 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i1.25-32

Abstract

Soil health is very important point for plant growth which is measured by several indicators. The purposes of the research were to assess and to classify soil health Padang Betuah area of Bengkulu, and to compare between soil health indicators and lettuce plant performance indicators. Soils, consist of mineral and peat soils, were sampled using a soil random sampling technique. Lettuce plants were grown in polybags using sample soils. Both lettuce performance and soil health were assessed by calculating the percentage of total scores of lettuce plant or soil performance indicators which derived from variables observed. Soil variables for field evaluation included color, moisture content, texture, structure, compaction, land slope, organic matter, pH, amount of earthworm, erosion level, LCC (Legume Cover Crop), and vegetation performance. Soil variables for laboratory evaluation were pH, electrical conductivity (EC), total Carbon and Nitrogen, available-Posphorus, cation exchangeable capacity, basesaturation, and aluminum saturation. While, the variables for lettuce growth performance included plant height, numbers of leaf, degree of leaf greenness, plant fresh weight, and relative percentage of shoot : root ratio. The results of field and laboratory evaluation showed that soil health were categoried as a healthy soil and moderate healthy soil both for mineral and peat soils, respectively. Furthermore, similar categories were also obtained for evaluation of plant performance categories. No correlation was found between the soil performance indicatorcategory and the lettuce performance category.Keywords: Field indicator, laboratory indicator, lettuce growth indicator, soil health
Manures Effectivity to Enhanced the Availability of Phosphorus, Crops Growth and Yield of Rice and Corn in Acid Upland Soil Yoyo Sulaiman
JOURNAL OF TROPICAL SOILS Vol 13, No 1: January 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i1.41-47

Abstract

The research was conducted in Tamanbogo Station Research in the 2007 Rainy Season in upland rice-corn intercropping farming. The research design used Randomized Complete Block Design with 3 replications. The treatments were 1). 15 t ha-1 manures + Residues of rock phosphate (RRP),  2). Without manures + RRP, 3). 15 t ha-1 manures + 150 kg  ha-1 SP 36 and  4). Without manures + 150 kg ha-1 SP 36. The upland rice was seeded in planting space of 25 cm x 25 cm, 2-3 seeds/hill. The land was treated with 1 t ha-1 of RP in the last farming year while SP36 was applicated each season. Urea and KCl fertilizers that were used on upland rice were 300 kg ha-1 and 100 kg ha-1, respectively while corns were fertilized with 250 kg ha-1 urea and 100 kg KCl ha-1. The research results showed that the availability of N and K nutrients in the soil at the time of before planting was low but the availability P was high. Application of manures and RRP increased C-organic, availability of P , Ca and  Cation Exchangeable Capacity in the soil. Application of 15 t ha-1 of manures with RRP increased dry biomass weight of rice and corn, there were 45.17 % and 49.23 %, respectively. The grain yield of rice and corn on the treatment of manures and RRP were not gave significant different compare to the yield was gained with SP 36  fertilizer.
The Application of Rice Hull Mulch and Potassium Nitrate on Growth and Yield of Kailan (Brassica oleraceae var. Long Leaf) Sri Ramadiana
JOURNAL OF TROPICAL SOILS Vol 16, No 2: May 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i2.145-150

Abstract

Potassium (K) is absorbed by plants in larger amounts than any other mineral element except N to optimalize plant growth. Mulches may be influenced an available K at vegetative growth phase of plant. The research was conducted in Simpang Kanan Village, Gisting, Tanggamus Lampung Province. The objectives of this research were to study the application of KNO3 and rice hull mulch on growth and yield of kailan. Fields experiments were arranged by a factorial in a completely randomized block design with 10 treatments and 3 replications. A first factor was (1) dosages of KNO3 (150, 175, 200, 225, and 250 kg ha-1) and the second factor was mulch of the rice hull (with and without the rice hull). The results showed that the application of the rice hull did not significantly affected the yield of kailan, however the application of KNO3 till 250 kg ha-1 increased the level of greenness up to 6.10% and the wide of leaf up to 18,57%. In addition, the present of potassium fertilizer suspended with the rice hull significantly affected the width of kalian leaf.Keywords: Kailan, mulch, potassium nitrate, rice hull
The Relationship between Phosphate Adsorption and Soil Organic Carbon from Organic Matter Addition Fadly Hairannoor Yusran
JOURNAL OF TROPICAL SOILS Vol 15, No 1: January 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i1.1-10

Abstract

The Relationship between Phosphate Adsorption and Soil Organic Carbon from Organic Matter Addition (FH Yusran): The application of organic matter (OM) can increase soil phosphorus (P) availability via soil mineralisation. In lateritic soils, however, soluble organic carbon (OC) from OM may also reduce phosphate adsorption capacity, a process that also releases P in soil solution. In these soils, competitive adsorption could be dominant compared to mineralisation. The main objectives of this study were to study phosphate adsorption in three lateritic soils which have been treated with different types and amounts of organic amendment, and had intrinsic OC removed by combustion. The adsorption isotherms showed that OM addition could reduce phosphate adsorption and that this reduction could last up to nine months after application. Lucerne hay was more effective than peat and wheat straw additions in reducing phosphate adsorption capacity. The bicarbonate phosphorus (BP) release through mineralisation occurred despite the increase of phosphate adsorption capacity due to the combustion of soil samples. Peat treatment was predicted to be more effective in creating organo-metal complexes with Al and Fe. Overall, mineralisation from added organic amendment was effective in minimising P adsorption in lateritic soil. 

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