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PERTUMBUHAN DAN HASIL PADI SAWAH ORGANIK DENGAN MENGGUNAKAN PUPUK KANDANG SAPI DAN AZOLLA

Caraka Tani: Journal of Sustainable Agriculture Vol 30, No 2 (2015): October
Publisher : Universitas Sebelas Maret

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Abstract

Farmyard manure and azolla are potential sources of organic fertilizer in organic paddy field. This study aimed to determine the effect of using farmyard manure and azolla on growth and yield of rice crop. The research method was field trial in an organic paddy field, Sukorejo Village, Sragen, Indonesia. Experimental design which used was a completely randomized block design with 9 kinds of treatment which are repeated in 3 blocks. These kind of treatments were the using of farmyard manure, azolla fertilizer, azolla inoculum, and the combinations which is based on the fulfillment of nutrient requirements of 120 kg N ha-1. Farmyard manure significantly increased the fresh weight of biomass (two-way ANOVA F = 3.13 p < 0.05), the weight of grains per panicle (two-way ANOVA F = 3.36 p < 0.05) and dry grain harvest (two-way ANOVA F = 3.71 p < 0.05). Azolla fertilizer significantly increased the plant height (two-way ANOVA F = 2.93 p < 0.05). Meanwhile azolla inoculum did not give significant effect on all parameters (both growth and yield). Dry grain harvest has very significant correlation with plant height (0.68**); fresh weight of biomass (0.79**); weight of grains per panicle (0.61**); and grain weight of 1,000 seeds (0.48*). The result of F test and correlation analysis showed that farmyard manure significantly increases the dry grain harvest through its role on increasing the weight of fresh biomass and grain weight per panicle. Azolla fertilizer also significantly increased the dry grain harvest through its role on increasing the plant height. However, the effect of Azolla fertilizer to increase the dry grain harvest was weaker than farmyard manure.

PEMETAAN POTENSI EMISI GRK METANA: SEBAGAI STRATEGI MITIGASI EMISI DAN MENJAGA PRODUKTIVITAS LAHAN PADI SAWAH ORGANIK DI KABUPATEN SRAGEN

Caraka Tani: Journal of Sustainable Agriculture Vol 27, No 2 (2012): October
Publisher : Universitas Sebelas Maret

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Abstract

Tujuan umum penelitian ini adalah memetakan potensi produksi emisi metana pada lahan sawah organik di Desa Sukorejo dan Jetis, Kecamatan Sambirejo, Sragen, yang dapat digunakan untuk memitigasi emisi metana dan meningkatkan produktivitas lahan. Secara garis besar pelaksanaan penelitian dibagi menjadi 4 tahap ; (1) karakterisasi tanah dan lahan, pengungkapan secara mendalam karakter obyek lahan pada setiap satuan penggunaan lahan sawah, (2) pengukuran potensi produksi emisi metana, dengan metode inkubasi sampel tanah di laboratorium, sampel gas yang dihasilkan dianalisis menggunakan kromatografi gas yang dilengkapi dengan flame ionization detector (FID) untuk menetapkan flux CH4, (3) analisa data, taraf perbedaan nilai potensi produksi metana diketahui dengan analisis beda nyata Uji T, dan penentuan faktor yang paling berperan terhadap besarnya potensi emisi metana dengan analisis stepwise regression, dan (4) rekomendasi, pemilihan rekomendasi didasarkan pada praktek budidaya pertanian yang efektif meningkatkan C organik dan menekan produksi emisi metana tanpa mengurangi produktivitas tanaman. Hasil penelitian menunjukkan bahwa ; (1) potensi produksi metana (CH4) berbeda nyata antar satuan penggunaan lahan (SPL) sawah di Desa Sukorejo dan Jetis, (2) iklim, varietas tanaman dan cara budidaya di daerah penelitian tidak signifikan mempengaruhi besarnya potensi produksi metana, dan (3) faktor yang berpengaruh signifikan terhadap besarnya potensi produksi metana di tanah sawah adalah potensial redoks (Eh). Hubungan Eh dengan besarnya potensi produksi metana berkorelasi negatif, artinya penurunan Eh akan menyebabkan peningkatan produksi metana. Mitigasi emisi GRK metana yang dapat dilakukan berdasarkan penelitian ini, bahwa potensial redoks adalah faktor utama penentu potensi produksi metana di dalam tanah sawah, maka alternatif yang memungkinkan adalah dengan pengelolaan air irigasi, yang dalam periode tertentu tanaman padi tidak diairi atau tidak digenangi, atau apabila kondisi air berlebih dilakukan drainase. Usaha ini dilakukan dengan tujuan kondisi tanah tidak terlalu reduktif atau potensial redoks tidak akan turun secara drastis, sehingga akan dapat menghambat aktivitas mikrobia methanogen dalam memproduksi metana.

Aplikasi Sistem Informasi Geografi (Gis) untuk Pemetaan dan Simulasi Erosi Tanah

Caraka Tani: Journal of Sustainable Agriculture Vol 22, No 1 (2007): March
Publisher : Universitas Sebelas Maret

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The aims of the research are to use the technology of the geographic information system for mapping and simulation of the soil erosion, and to know the difference betweet actual and potential erosion on the spesific land use type. The area of the research is Jumapolo District, Karanganyar Regency. USLE equation method (R=R.K.L.S.C.P) was used to predict the soil erosion intensity. The steps of the research are (1) pre-survey, prepared equipments for suvey, (2) survey, was done by exploring predertemined land map unit, and (3) labs, analysis of the soil samples, the rainfall data and teh ArcView GIS. Analysis was done using rating based on Zachar (1982) in order to know the difference of the soil erosion intensity.The results of the research are first, geographic information system is useful to mapping and simulation of the soil erosion, especially to calculate data that numerous and difficult, to overlay, to layout the map (or the other spasial data) and the statistic of land area, second, Jumapolo District has variability of the soil erosion intensity i.e. very slight 25,77 ha (0,62% of the agriculture land area), slight 815,71 ha (20,39%), moderate 1.094,69 ha (25,49%), severe 1.150,58 ha (33,09%), very severe 827,25 ha (18,88%) and catastrophic 243,69 ha (1,53%) and third, the change of the land unit type and the conservation technic can change the soil erosio  intensity. Simulation process result that land area which have soil erosion intensity severe, very severe and catastrophic changes become slight and moderate, therefore the new compotitions of the soil erosion intensity are very slight 25,77 ha (0,62%), slight 1.665,48 ha (40,06%), moderate 2.466,43 ha (59,32%), and each severe, very severe and catastrophic 0 ha (0%).

EVALUASI PENERAPAN PERTANIAN PADI SAWAH SEMI ORGANIK SETELAH MUSIM TANAM V

Caraka Tani: Journal of Sustainable Agriculture Vol 24, No 1 (2009): March
Publisher : Universitas Sebelas Maret

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The study about “Evaluation of semi organic system on rice production at fifth plant season” whose purpose to evaluate the quality and rice yield at semi organic system at fifth plant season, its impact on soil chemistry properties and its properness to farmers. This field experiment has been conducted from May to September 2008 at Palur, Sukoharjo, with two factors. The first factor is anorganic fertilizer at recommendation dose (Urea 300 kg ha-1, ZA 100 kg ha-1, SP-36 150 kg ha-1, KCl 100 kg ha-1). The second factor is 30% of dose recommendation anorganic fertilizer (Urea 100 kg ha-1, ZA 30 kg ha-1, SP-36 50 kg ha-1, KCl 30 kg ha-1) and five tons organic fertilizer. The data was analyzed with T test to evaluate the differences of semi organic system and anorganic system. The experiment’s result shows that the semi organik system gives weight of dry straw which is higher than anorganic system. The yield of dry unhulled rice in semi organic system(9,2 ton/ha) isn’t significantly different from the weight which is compared with anorganic system (8,576 ton/ha). From the economic analysis, semi organic system gives higher profit than anorganic system. The rice quality (dust and fiber contain) in semi organic system is higher but protein contain isn’t different. Semi organik system gives organik matter contain (1,618%), KPK (14,454 cmol/kg), N total (0,368%), available P (0,368 ppm) and available K (164,96 me%) which is signiificantly higher but givew lower pH (5,5) than anorganic system.

PENGARUH KASCING DAN PUPUK ANORGANIK TERHADAP KETERSEDIAAN NITROGEN PADA ALFISOLS JUMANTONO DAN SERAPANNYA OLEH TANAMAN JAGUNG MANIS (Zea mays L. saccharata)

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 7, No 2 (2010)
Publisher : Faculty of Agriculture, Sebelas Maret University

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The purpose of this experiment is to know the effect of vermicompost and inorganic fertilizer on availability of nitrogen at Alfisols Jumantono and its absorption in sweet corn (Zea mays L. saccharata). This research was done from September 2007 until January 2008 in Sub district of Jumantono, Regency of Karanganyar, soil and plant tissue analysis was done in Laboratory of Chemical and Soil Fertility, Agriculture Faculty, Sebelas Maret University Surakarta. This research represents experimental research by using Randomized Completely Block Design (RCBD) factorial with two factors. First factor was vermicompost dosage and second factor was inorganic fertilizer dosage (urea, SP36, KCl). Factor I consisted of 3 level that is: K0 (without vermicompost), K1 (vermicompost 1.5 ton.ha-1), K2 (vermicompost 3 ton.ha-1). Factor II consisted of 3 level that is: A0 (without inorganic fertilizer), A1 (urea 100 kg.ha-1, SP36 50 kg.ha-1, and KCl 25 kg.ha-1), A2 (Urea 200 kg.ha-1, SP36 100 kg.ha-1, and KCl 50 kg.ha-1). From bolt of the factor obtained 9 treatment combination and each treatment combination repeated 3 times. Statistics analysis use F Test, Kruskal Wallis, DMRT, Mood Median, and Correlation. Research result indicates that there are interaction between vermicompost and inorganic fertilizer which improving availability of nitrogen at Alfisols and its absorption in sweet corn. Highest of N available by present of vermicompost 3 ton.ha-1 + urea 200 kg.ha-1, SP36 100 kg.ha-1, and KCl 50 kg.ha-1 that is 0.095%. Highest of N Absorption and N of plant tissue that is 0.714 g/plant and 1.39% shown by present of interaction between vermicompost 3 kg.ha-1 and without inorganic fertilizer. Highest of total N shown by present of urea 200 kg.ha-1, SP36 100 kg.ha-1, KCl 50 kg.ha-1 that is 0.30%. Keywords: Vermicompost, inorganic fertilizer, Alfisols, sweet corn, N availability, N absorption

PENDUGAAN PERKEMBANGAN ALFISOLS DI KECAMATAN JATIPURO, KARANGANYAR DENGAN MODEL KESTABILAN GENETIK

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 8, No 1 (2011)
Publisher : Faculty of Agriculture, Sebelas Maret University

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This research had been conducted at Jatipuro, Sub district of Karanganyar from July until September, 2007. The aim of this research are to know and comparing the development of Alfisols with genetic stability model. This research was descriptive‐explorative research, and the variables approached by field’s survey and supported by laboratory analysis. The site sampling on the fields determined with soil mapping unit. Samples for physical, chemicals and sand mineralogy properties was take from representative pedon or profile from each soil mapping unit. This research uses statistical analysis stepwise regression to know which the most variable can explain the soil development, and the Eberhart‐Russell’s genetic stability model to determine the degree of soil stability for any soil mapping unit. The result of this research can be concluded that the 3rd soil mapping unit (NGEPUNGSARI series, Ultic Hapludalfs, very fine, kaolinitic, active, non acid, isohyperthermic family) was the most’s stable in soil development, and followed by 1st soil mapping unit (JATISOBO series, Vertic Hapludalfs, very fine, kaolinitic, active, non acid, isohyperthermic family). Even though, the 2nd soil mapping unit (JATISUKO series, Typic Hapludalfs, very fine, kaolinitic, active, non acid, isohyperthermic family) was the most’s unstable in soil development. Each soil mapping unit also showed the difference of soil development, that looking from the endogen and exogen’s factors can be explained. Keywords: Alfisolfs, development, differentiated, Genetic Stability Model

MODEL PENGELOLAAN N, P DAN K PADA TANAH SAWAH DI KECAMATAN JATISRONO, WONOGIRI

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 7, No 2 (2010)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Available of N, P and K nutrient at paddy soil of Sub district Jatisrono, Regency Wonogiri very low cause farmer fertilizer application, land morphology, and climate. The purpose of this research is to prove that relationship model endogen and exogenous variable can be used as reference in N, P and K management for paddy soil. This research was conducted in Sub district Jatisrono, Regency Wonogiri at February until June 2008. This research is descriptive explorative and functional relationship research. The variables approach by field survey and supported laboratory analysis of the soil chemical and physical properties, use statistical analysis stepwise regression, simple Correlation test and regression analysis. The result of this research show that model which have been tested can be use as reference in N, P and K management for paddy soil in Sub district Jatisrono, Regency Wonogiri, while its model is total soil N is = 0.939 + 0.424 KPK + 0.006 Fertilizer Type, Soil Available P = 45.9 – 3.9 pH + 2.38 fertilizer Dose, Soil Available K = - 0.016 + 0.0482 pH – 0.0010 organic substance. Keywords: N, P, and K Management Model, Paddy Soils

PEMETAAN TINGKAT BAHAYA EROSI LAHAN KERING DI KECAMATAN JATIPURO KABUPATEN KARANGANYAR DENGAN SISTEM INFORMASI GEOGRAFI (SIG)

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 7, No 2 (2010)
Publisher : Faculty of Agriculture, Sebelas Maret University

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This research had been conducted at Jatipuro, Sub District of Karanganyar from July until September, 2007. The aims of this research are to know degree of erosion danger and to map that degree of erosion danger. This research was descriptive-explorative by field’s survey and laboratory analysis. Soil sampling technique using purposive sampling method. Site sampling determined with land mapping unit. Analysis of erosion level using USLE method, even though to know degree of erosion dangerous used the table of relation soil depth with erosion level. To make the map degree of erosion dangerous with Arc view GIS 3.3 software. The result of this research conclude that Jatipuro, Sub District of Karanganyar can be classified into 4 erosion dangerous class, with position and width area such that very light in 6th land mapping unit with width area 8.53 ha or 1.17% from total wide of research area. Light, in 1st, 4th, 7th, 12tnd and 16th land mapping units with width area 245.36 ha or 33.72% from total wide of research area. Middle class, in 2nd, 8th, 9th, 10th, 14th, 15th, 17th and 18th land mapping units with width area 181.59 ha or 24.95% from total wide area. Heavy class, in 3rd, 5th, 11th, 13th, 19th, 20th, 21st and 22nd land mapping units with width area 292.18 ha or 40.15% from total wide area. The management of conservation in the land with degree of erosion danger very light until light is low tillage applications, which this purpose is to create soil condition that supported growth of root, but also must be understood the result of tillage, which can be broken soil structures. For the lands with degree of erosion danger middle until heavy, the better conservation is needed. These lands needed terrace’s repairing, there are making bench terrace with middle construction for the middle class and more better terrace for the heavy one. For the best result to minimalist erosion level in this location, in terrace’s making also needed vegetative conservation, there is strip grass to strength the terrace, and also mulching. Keywords: degree of erosion hazard, dry land, GIS

Soil Fertility Status of Organic Paddy Experiment

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 12, No 2 (2015)
Publisher : Faculty of Agriculture, Sebelas Maret University

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The study aims to determine fertility status of the soil after organic paddy experiments using kinds and doses of organic fertilizers. Experiment was conducted at greenhouse laboratory in Faculty of Agriculture Sebelas Maret University Surakarta. Experimental design used completely randomized design with 9 kinds of treatment was replicated 3 times. Experiments were the use of cow manure, Azolla fertilizer, Azolla inoculum and its combinations that are based on fulfilling nutrient requirements of 120 kg N ha-1.Result shows that the use of cow manure, Azolla fertilizers and Azolla inoculum had no effect on changes of soil fertility status. Soil fertility status was not significantly correlated with cow manure (0,16ns), Azolla fertilizer (0,26ns) and Azolla inoculum (0,16ns). Average of final soil fertility status included fertile category, which was similar as the initial soil fertility status. Average of final soil properties of treatment but nevertheless was relatively higher than in no treatment, indicating the use of cow manure, Azolla fertilizer, Azolla inoculum and its combinations had greater impact to soil properties. Cow manure despite increased available K2O and dry grain, but it did not significantly increase the soil fertility status from fertile to very fertile. This was presumably due to the relatively short experiment period, only one planting season had not given significant effect to soil properties. Implication of this study is the use of cow manure, Azolla fertilizer, Azolla inoculum and its combinations although did not increase the soil fertility status but could maintain soil fertility status as the initial conditions before planting.

Changes in Soil Chemical Properties of Organic Paddy Field with Azolla Application

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 13, No 2 (2016)
Publisher : Faculty of Agriculture, Universitas Sebelas Maret

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The use of high organic fertilizer in the organic farming system is one of the obstacles in the implementation of organic farming in Indonesia. It is necessary to find alternative materials to substitute or meet the shortage of existing organic fertilizer. This study aims to determine the effect of Azolla (Azolla mycrophylla. L) on some soil chemical properties on organic paddy field. The The field experiments used factorial complete randomized block design of three factors, namely Azolla (0 and 2  tons / ha), Manure (0 and 10  tons / ha) and Rice Varieties ( Mira1, Mentik Wangi and Merah Putih), with three times replication.  Azolla  2  tons / ha is able to increase soil total  N 18%; available P  87,5 %; organic C  3,78% CEC 8,03 % and soil pH 1,00%;  compared to control (without Azolla). Compared with manure 10  tonss / ha, giving Azolla 2  tonss / ha was able to increase only on soil available P about 50 %, but lower on  soil total N, organic C, CEC and  soil pH  1,9% ; 9,27% ; 9,40% and 0,67%.  Azolla can be used as a substitute or complement  of manure on organic  paddy field.