Kajian Fraksionasi Fosfor (P) Pada Beberapa Pola Penggunaan Lahan Kering Ultisol di Desa Jalin Jantho Aceh Besar

Abstrak. Penelitian ini bertujuan untuk mengetahui komposisi fraksi fosfor (P) pada beberapa pola penggunaan lahan kering Ultisol di Desa Jalin Jantho Aceh Besar. Penelitian ini menggunakan metode deskriptif yang didasarkan pada pengamatan ciri - ciri tanah dilapangan dan analisis tanah di laboratorium. Hasil analisis penelitian menunjukkan bahwa kandungan P-tersedia tanah paling tinggi di jumpai pada penggunaan lahan sawah lapisan permukaan (1,6 ppm), Kandungan P-total tertinggi dijumpai pada penggunaan lahan hutan sekunder lapisan bawah permukaan (76 ppm). Bentuk fosfor yang paling diminan dijumpai berupa fraksi Fe-P kemudian diikuti oleh Al-P dan Ca-P. Nilai Fraksi Fe-P tertinggi terdapat pada lapisan bawah permukaan hutan sekunder (2141,59 ppm), Nilai fraksi Al-P tertinggi terdapat pada lapisan permukaan padang rumput (12,32 ppm), Nilai Ca – P hanya dijumpai pada penggunaan lahan hutan sekunder lapisan atas permukaan (413,61 ppm) dan lapisan bawah permukaan (2141,56 ppm) The Study of Phosphorus (P) Fractionation on some Patterns the Use of Ultisol Dry Land in Jalin Jantho, Aceh BesarAbstract. This study aims to determine the composition of the phosphorus fraction (P) in some patterns in the use of Ultisol dry land in Jalin Jantho, Aceh Besar. This research uses descriptive method based on observation of soil characteristics in the field and soil analysis in the laboratory. The analysis of research indicated that the highest P-content was encountered on the topsoil wetland (1.6 ppm), the highest total P-content was found in the use of subsoil secondary forest (76 ppm). The most visible phosphorus form is found in the Fe-P fraction followed by Al-P and Ca-P. The highest Fe-P fraction value is found in the subsoil secondary forest (2141,59 ppm). The highest Al-P fraction is found on the grassland topsoil (12,32 ppm), Ca-P value is only found in the use of topsoil (413.61 ppm) and subsoil secondary forest (2141.56 ppm)

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Phosphorus forms in leaves and their relationships with must composition and yield in grapevines

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2017000500005 ◽

2017 ◽

Vol 52 (5) ◽

pp. 319-327 ◽

Cited By ~ 5

Author(s):

Rogério Piccin ◽

Rafael da Rosa Couto ◽

Roque Júnior Sartori Bellinaso ◽

Luciano Colpo Gatiboni ◽

Lessandro De Conti ◽

...

Keyword(s):

The Other ◽

Available P ◽

Anthocyanin Content ◽

P Fractionation ◽

Cabernet Franc ◽

Phosphorus Forms ◽

Yield Parameters ◽

P Content ◽

Total P

Abstract: The objective of this work was to evaluate phosphorus forms in grape leaves and their relationships with must composition and yield in grapevines grown in a Typic Hapludalf with different available P contents. Two experiments were carried out with Vitis viniferacultivars, one with 'Tannat' and the other with 'Cabernet Franc' grapes. Experiment 1 consisted of two vineyards of 'Tannat', with the following P content in the soil: V1, 11.8 mg kg-1 P; and V2, 34.6 mg kg-1 P. Experiment 2 consisted of two vineyards of 'Cabernet Franc', with the following P content in the soil: V1, 16.0 mg kg-1 P; and V2, 37.0 mg kg-1 P. Leaves were collected at flowering (FL) and veraison (V), and, after their preparation, P forms were evaluated. Yield and must composition were assessed. The highest yield was observed in V2 of experiment 1 and in V2 of experiment 2. Total P content and P forms in leaves at FL and V have no relationship with yield parameters; however, total P content in leaves has a relationship with anthocyanin content in the must of 'Tannat' grapevines. Therefore, P fractionation in leaves predicts neither grapevine yield nor must composition.

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Pemetaan Kebakaran Hutan Dan Lahan Kabupaten Tanah Bumbu Kalimantan Selatan Menggunakan Aplikasi Sistem Informasi Geografis

Jurnal Planologi ◽

10.30659/jpsa.v17i2.12606 ◽

2020 ◽

Vol 17 (2) ◽

pp. 232

Author(s):

Agus Sarwo Edi ◽

Agnesia Putri Kurnianingtyas

Keyword(s):

Information System ◽

Geographic Information System ◽

Land Cover ◽

Secondary Forest ◽

Geographic Information ◽

Risk Area ◽

Dry Land ◽

Geospatial Modelling ◽

Rain Fall ◽

Descriptive Method

ABSTRACT Forest and land fires are one of the main factors in forest destruction, so as in Tanah Bumbu District, South Kalimantan Province. It always occur every year especially during the dry season. This study aims to obtain the distribution of the risk area for forest and land fires in Tanah Bumbu District and to map the areas based on their level of forest and land fires vulnerability using geographic information system. Geospacial modelling to map the vulnerability of forest and land fires uses six parameters, those are hotspot distribution, land use and land cover, topography, hydrology (river accesibility), rain fall, and demographic and settlement accesibility data. The analytical method used are overlay, skoring, and descriptive method. The results of this study indicate that the vulnerability of forest and land fire in Tanah Bumbu district consists of five classes, those are secure zone of 166.570, 21 ha (32,87%), not vulnerable zone of 159.477,86 ha (31,47%), a bit vulnerable zone of 97.297,33 ha (19,2%), vulnerable zone of 59.862,88 ha (11,81%), and a verry vulnerable zone of 23.487,68 ha (4,63%). Land cover with high risk of forest and land fire are shrubs, dry land agriculture, secondary forest, plantations, and plantation forests. While Kecamatan Satui and Kecamatan Kusan Hulu area the area that very vurnerable.Keywords: forest and land fires, vurnerability, geospatial modelling, geographic information system ABSTRAKKebakaran hutan dan lahan merupakan salah satu faktor utama dalam kerusakan hutan, begitu pula di Kabupaten Tanah Bumbu Provinsi Kalimantan Selatan. Setiap tahun kebakaran hutan dan lahan selalu terjadi, terutama pada musim kemarau. Penelitian ini bertujuan untuk memperoleh sebaran daerah resiko kebakaran hutan dan lahan di Kabupaten Tanah Bumbu serta memetakan daerah rawan kebakaran hutan dan lahan berdasarkan tingkatan kerawanannya menggunakan sistem informasi geografis. Pemodelan geospasial untuk membuat peta kerawanan menggunakan enam parameter yaitu sebaran hotspot, penggunaan lahan dan tutupan lahan, topografi, hidrologi khususnya aksesibilitas terhadap sungai, curah hujan, serta data demografi dan aksesibilitas permukiman. Metode analisis yang digunakan adalah metode tumpang susun (overlay), pembobotan, dan deskriptif.Hasil penelitian ini menunjukkan bahwa kerawanan kebakaran hutan di kabupaten Tanah Bumbu terdiri dari lima kelas yaitu daerah aman seluas 166.570, 21 hektar (32,87%), daerah tidak rawan seluas 159.477,86 hektar (31,47%), daerah agak rawan seluas 97.297,33 hektar (19,2%), daerah rawan seluas 59.862,88 hektar (11,81%), dan daerah sangat rawan seluas 23.487,68 hektar (4,63%). Tutupan lahan yang paling sering terjadi kebakaran hutan dan lahan adalah belukar, pertanian lahan kering, hutan sekunder, perkebunan, dan hutan tanaman. Daerah paling rawan terhadap kebakaran hutan dan lahan adalah Kecamatan Satui dan Kecamatan Kusan Hulu.Kata Kunci: kebakaran hutan dan lahan, kerawanan, pemodelan geospasial, sistem informasi geografis

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LAND USE TYPES AND SOIL CHARACTERISTICTS: A CASE STUDY IN HUONG VINH COMMUNE, HUONG TRA TOWN, THUA THIEN HUE PROVINCE

HUE UNIVERSITY JOURNAL OF SCIENCE EARTH SCIENCE AND ENVIRONMENT ◽

10.26459/hujos-ese.v126i4b.4121 ◽

2017 ◽

Vol 126 (4B) ◽

Author(s):

Trần Thanh Đức

Keyword(s):

Land Use ◽

Sweet Potato ◽

Soil Analysis ◽

Soil Characteristics ◽

Low Ph ◽

Clay Loam ◽

Total N ◽

Land Use Types ◽

Total P

This research carried out in Huong Vinh commune, Huong Tra town, Thua Thien Hue province aimed to identify types of land use and soil characteristics. Results showed that five crops are found in Huong Vinh commune including rice, peanut, sweet potato, cassava and vegetable. There are two major soil orders with four soil suborders classified by FAO in Huong Vinh commune including Fluvisols (Dystric Fluvisols, Gleyic Fluvisols and Cambic Fluvisols) and Arenosols (Haplic Arenosols). The results from soil analysis showed that three soil suborders including Dystric Fluvisols, Gleyic Fluvisols and Cambic Fluvisols belonging to Fluvisols were clay loam in texture, low pH, low in OC, total N, total P2O5 and total K2O. Meanwhile, the Haplic Arenosols was loamy sand in texture, poor capacity to hold OC, total N, total P2O5 and total K2O

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SORPTION OF CARBON AND PHOSPHORUS FROM LIQUID POULTRY MANURE BY SOIL AGGREGATES OF DIFFERING SIZE

Canadian Journal of Soil Science ◽

10.4141/cjss85-050 ◽

1985 ◽

Vol 65 (3) ◽

pp. 467-473 ◽

Cited By ~ 14

Author(s):

V. K. BHATNAGAR ◽

M. H. MILLER

Keyword(s):

Soil Aggregates ◽

Poultry Manure ◽

Aggregate Size ◽

Liquid Manure ◽

Inorganic P ◽

Supernatant Liquid ◽

Extractable P ◽

P Content ◽

Manure Slurry ◽

Total P

A series of laboratory experiments was conducted to determine the mechanism(s) responsible for a previously reported observation that addition of liquid manure to soil increased the NaHCO3-extractable P (Ext-P) of large aggregates (> 2 mm) more than that of smaller aggregates whereas addition of an inorganic P solution did not. Application of liquid poultry manure increased the total P, Ext-P and total C concentrations in large aggregates (> 2 mm) much more (> 2.5 ×) than that in small aggregates (< 1 mm). Addition of inorganic P solution or of supernatant liquid from a centrifuged manure slurry increased the P content of the large aggregates only slightly (1.2 ×). A greater increase in Ext-P in large aggregates was observed even when the smaller aggregates were purposely layered on top of the larger ones prior to addition of the liquid manure. A similar but less pronounced effect of aggregate size on increase in P or C concentration was observed when different sized aggregates were left in contact with an effectively infinite source of liquid manure for 24 h. It is concluded that the larger aggregates absorbed more of the bulk manure slurry than smaller aggregates. A partial sealing of small aggregates by particulates is suggested as a possible mechanism. Key words: Carbon, phosphorus, liquid manure, soil aggregates

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Spatial distribution of water-mobilizable colloids and phosphorus from dam reservoir sediment

10.5194/egusphere-egu21-15545 ◽

2021 ◽

Author(s):

Ngoc Diep Nguyen ◽

Malgorzata Grybos ◽

Marion Rabiet ◽

Véronique Deluchat

Keyword(s):

Sediment Resuspension ◽

Ecological Problem ◽

Dam Reservoir ◽

Reservoir Sediment ◽

Sampling Campaign ◽

Sediment Mass ◽

Dam Reservoirs ◽

Phosphorus Form ◽

P Fraction ◽

Intrinsic Component

The hydrodynamics of dam reservoirs favor the accumulation of phosphorus (P) in bottom sediments since it has a strong affinity for the sedimentary particles. However mechanical disturbance of sediment (resuspension) may release P back to water column. The load of sedimentary P poses a serious ecological problem related to the maintaining of water eutrophication. The aim of this study was to evaluate the potential of sediments, accumulated in Champsanglard reservoir (Central France), to release water-mobilizable colloidal and dissolved P. A sampling campaign was carried out at different locations along the main channel of reservoir from riverine to lacustrine area and characterized by different hydrodynamics. The results showed that colloids are intrinsic component of reservoir sediment and contribute up to 2.3% of sediment mass. Colloidal P attributed up to 6% of total sedimentary P and 80% of water-mobilizable P (fraction < 1 &#181;m). The stock of water-mobilizable colloids and associated P varied according to particle size distribution and was strongly dependent to channel morphology, hydrodynamics and inlet of tributary.Keywords: Dam reservoir, sedimentary colloids, phosphorus form, spatial variability

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Pengembangan Usaha Budidaya Ikan Lele (Clarias sp.) di Lahan Kering di Kabupaten Gunungkidul, Provinsi Daerah Istimewa Yogyakarta

MANAJEMEN IKM: Jurnal Manajemen Pengembangan Industri Kecil Menengah ◽

10.29244/mikm.9.1.96-105 ◽

2014 ◽

Vol 9 (1) ◽

pp. 96-105

Author(s):

Denny Jatnika ◽

Komar Sumantadinata ◽

Nora Herdiana Pandjaitan

Keyword(s):

Swot Analysis ◽

Business Development ◽

Feasibility Analysis ◽

Dry Land ◽

Technical Aspects ◽

Traditional Markets ◽

Capital Efficiency ◽

Market Coverage ◽

The One ◽

Descriptive Method

The one commodity that is highly prospective for cultivated on an industrial scale and households are catfish (Clarias sp.). The purpose of this study was (1) analyze the feasibility of catfish farming in dry land in the district of Gunung Kidul Yogyakarta Province, (2) analyze the potential of catfish farming in ponds tarp on dry land, (3) develop alternative business development in the district of Gunung Kidul Yogyakarta Province. The method used in this thesis is descriptive method that focuses on technical aspects and business cultivation, as well as a SWOT analysis. Based on the feasibility analysis has a promising prospect and deserves to be developed. To maximize revenue catfish farmers, a combination of strategies SO, WO Strategies and strategy ST is an appropriate strategy to be chosen by farmers to improve their business. Increase the number and extent of ponds and develop farming, applying methods of maintenance and cultivation of good, as well as expand market coverage ranging from individual consumers, restaurants and traditional markets to restaurants to modern markets to improve capital efficiency and increase profits for farmers catfish on dry land in the district of Gunung Kidul.

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Study Of Rubber Growth Under Constraint of Pyrite In Tidal Swampy Area

Journal of Wetlands Environmental Management ◽

10.20527/jwem.v5i2.108 ◽

2017 ◽

Vol 5 (2) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Charlos Togi Stevanus ◽

Umi Hidayati ◽

Thomas Wijaya ◽

Andi Nur Cahyo

Keyword(s):

Soil Analysis ◽

Shallow Groundwater ◽

Aerobic Condition ◽

Soil Surface ◽

Low Ph ◽

Survey Method ◽

Water Drainage ◽

Dry Land ◽

Nutrient Analysis ◽

Tidal Swamp

Muara Sugihan is one of the tidal swamp areas for rubber plant cultivation in South Sumatera. A preliminary survey of the land suitability in 2012 described that there are two main problems, the shallow groundwater problem and low pH (2,87-3,05) between 40-100 depth that indicates the presence of pyrite layers. In the prior of planting, the water drainage has been done to maintain the water table. However, the water drainage was excessive so that water table reach 66 cm from soil surface hence aerobic condition resulted in oxidation of pyrite layer. The method used in this study was survey method consist of measuring the girth of 2 years old rubber plants and sampling of soil, leaves, and water on the trench and the river which indicated the presence of pyrite layers on tidal swamp area, Muara Sugihan. The result showed that the growth of the rubber plants was inhibited, where the girth was 10 cm, while on optimal dry land they normally reached 18 cm. Leaf nutrient analysis showed there was deficient of P, K, and Zn, while on soil analysis showed a low P content. The pyrite was leach from the soil and accumulate into water drainage will lead to low pH of water. This problem can be solved by water management improvement.

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COFFEE YIELD AND PHOSPHATE NUTRITION PROVIDED TO PLANTS BY VARIOUS PHOSPHORUS SOURCES AND LEVELS

Ciência e Agrotecnologia ◽

10.1590/s1413-70542015000200002 ◽

2015 ◽

Vol 39 (2) ◽

pp. 110-120 ◽

Cited By ~ 1

Author(s):

Kaio Gonçalves de Lima Dias ◽

Antônio Eduardo Furtini Neto ◽

Paulo Tácito Gontijo Guimarães ◽

Thiago Henrique Pereira Reis ◽

Cesar Henrique Caputo de Oliveira

Keyword(s):

Crop Yields ◽

Soil Analysis ◽

Physicochemical Analysis ◽

Advanced Degree ◽

P Fertilization ◽

P Content ◽

Coffee Yield ◽

Phosphorus Sources ◽

Leaf P ◽

P Sources

Phosphorus (P) is considered one of the nutrients that most limits crop yields, especially in soils with an advanced degree of weathering. To evaluate P dynamics and availability in soil resulting from various P doses and sources and to assess the resulting P content of coffee leaves and the final coffee yield, an experiment was conducted in the municipality of Três Pontas, MG, Brazil, in a Red Argisol (Ultisol) area. Fertilization, except for P fertilization, was performed based on the soil analysis results. The annual P doses tested were 0, 75, 150, 300, 450 and 600 kg ha-1 P2O5. Two P sources, simple superphosphate and magnesium thermal phosphate, were evaluated and compared in the study. A physicochemical analysis of the soil and an analysis of leaf dry matter were performed. The available P content in the soil increased as a result of the applications of the two sources. The leaf P levels stabilized at approximately 1.8 and 1.9 g kg-1 for simple superphosphate and magnesium thermal phosphate, respectively, as a result of the application of approximately 300 kg ha-1 P2O5. The coffee responded to P fertilization in the production phase. Averaged over three harvests, the yield per harvest showed gains of 45.3% and 40.3% for simple superphosphate and magnesium thermal phosphate, respectively, with the application of the highest studied dose, 600 kg ha-1 P2O5.

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Bone char effects on soil: sequential fractionations and XANES spectroscopy

SOIL ◽

10.5194/soil-4-23-2018 ◽

2018 ◽

Vol 4 (1) ◽

pp. 23-35 ◽

Cited By ~ 9

Author(s):

Mohsen Morshedizad ◽

Kerstin Panten ◽

Wantana Klysubun ◽

Peter Leinweber

Keyword(s):

Xanes Spectroscopy ◽

Bone Char ◽

Reduced Sulfur Compounds ◽

Sequential Fractionation ◽

P Fractionation ◽

Edge Structure ◽

Amended Soils ◽

Soil P ◽

P Fraction ◽

Sequential P Fractionation

Abstract. The acceptability of novel bone char fertilizers depends on their P release, but reactions at bone char surfaces and impacts on soil P speciation are insufficiently known. By using sequential fractionation and synchrotron-based X-ray absorption near-edge structure (XANES) spectroscopy we investigated whether and how the chemical composition of bone char particles has been altered in soil and has consequently affected the P speciation of amended soils. Therefore, two different kinds of bone char particles (BC produced by the pyrolysis of degreased animal bone chips at 800 °C and BCplus, a BC enriched with reduced sulfur compounds) were manually separated from the soil at the end of two different experiments: incubation leaching and ryegrass cultivation. Sequential P fractionation of amended soils showed P enrichment in all fractions compared to the control. The most P increase between all treatments significantly occurred in the NaOH–P and resin-P fractions in response to BCplus application in both incubation-leaching and ryegrass cultivation experiments. This increase in the readily available P fraction in BCplus-treated soils was confirmed by linear combination fitting (LCF) analysis on P K-edge XANES spectra of BC particles and amended soils. The proportion of Ca hydroxyapatite decreased, whereas the proportion of CaHPO4 increased in BCplus particles after amended soils had been incubated and leached and cropped by ryegrass. Based on P XANES speciation as determined by LCF analysis, the proportion of inorganic Ca(H2PO4)2 increased in amended soils after BCplus application. These results indicate that soil amendment with BCplus particles leads to elevated P concentration and maintains more soluble P species than BC particles even after 230 days of ryegrass cultivation.

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Distribution of phosphorus fractions of different plant availability in German forest soils and their relationship to common soil properties and foliar P concentrations

10.5194/soil-2018-40 ◽

2018 ◽

Author(s):

Jörg Niederberger ◽

Martin Kohler ◽

Jürgen Bauhus

Keyword(s):

Soil Properties ◽

Forest Soil ◽

Soil Survey ◽

Soil Conditions ◽

Organic Carbon Content ◽

P Fractions ◽

P Pools ◽

P Content ◽

Labile P ◽

Total P

Abstract. Repeated, grid-based forest soil inventories such as the nationwide German forest soil survey (GFSI) aim, among other things, at detecting changes in soil properties and plant nutrition. In these types of inventories, the only information on soil phosphorus (P) is commonly the total P content. However, total P content in mineral soils of forests is usually not a meaningful variable to predict the availability of P to trees. Here we tested a modified sequential P extraction ac-cording to Hedley to determine the distribution of different plant available P fractions in soil samples (0–5 and 10–30 cm depth) from 146 GFSI sites, capturing a wide variety of soil conditions. In addition, we analyzed relationships between these P fractions and common soil proper-ties such as pH, texture, and organic Carbon content (SOC). Total P content among our samples ranged from approximately 60 up to 2800 mg kg−1. The labile, moderately labile, and stable P fractions contributed to 27 %, 51 % and 22 % of total P content, respectively, at 0–5 cm depth. At 10–30 cm depth, the labile P fractions decreased to 15 %, whereas the stable P fractions in-creased to 30 %. These changes with depth were accompanied by a decrease in the organic P fractions. High P contents were related with high pH-values. Whereas the labile P pool increased with decreasing pH in absolute and relative terms, the stable P pool decreased in absolute and relative terms. Increasing SOC in soils led to significant increases in all P pools and in total P. In sandy soils, the P content across all fractions was lower than in other soil texture types. Multiple linear regressions indicated that P pools and P fractions were moderately well related to soil properties (r2 mostly above 0.5), and sand content of soils had the strongest influence. Foliage P concentrations in Pinus sylvestris were reasonably well explained by the labile and moderately labile P pool (r

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