Jurnal Solum
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ISOLASI DAN UJI POTENSI BAKTERI NITRIFIKASI ASAL TANAH KEBUN KELAPA SAWIT DENGAN APLIKASI TANDAN KOSONG DAN LIMBAH CAIR PABRIK KELAPA SAWIT
Get PDFThis study aimed was to isolate nitrifiying bacteria from oil palm plantations fertilized with empty fruit bunch (EFB) and palm oil mill effluent (POME) and to analyze their potency. The soil samples were sampled from private oil palm plantations by purposive sampling method are mixed application (EFB + POME), EFB application, POME application and without application (C), and each location was taken 3 times. Isolation of nitrifiying bacteria was perfomed by using Nitrosomonas sp. and Nitrobacter sp. spesific media. The parameters observed were bacterial cells number, number of isolates and their potency. The results showed cells number of nitrifiying bacteria range 8.0 – 11.40 x 105cfu g-1 soil. A total of 18 isolates were isolated and potentially oxidized ammonium and nitrate. The best potential of bacteria in oxidizing ammonium at a concentration of 500 ppm (NH4)2SO4 was isolate NSC34 (3.4 ppm), and isolate with the best potential to produce nitrate at a concentration of 500 ppm (NH4)2SO4 were isolate of NBC225 (26.1 ppm). The most optimal activity of isolate bacteria to nitrifiying occurred at a concentration of 500 ppm (NH4)2SO4 and at 4 days incubation time.Key words : Nitrifiying bacteria, palm oil empty fruit bunch, palm oil mill effluen
PERTUMBUHAN DAN HASIL TANAMAN KEDELAI (Glycine max L.) TERHADAP PEMBERIAN VERMIKOMPOS DAN BIOCHAR DI TANAH ULTISOL
Get PDFThe use of organic matter in agricultural production is important in increasing crop production, especially in Ultisols. This study aimed to study the interaction between vermicompost and biochar on the growth and yield of soybean (Glycine max L.) in Ultisols. The research was carried out in the experimental station of the Faculty of Agriculture, Riau University, Bina Widya Tampan campus, Pekanbaru from July - September 2018. The research used factorial design form in a completely randomized design. The first factor is vermicompost which consists of 4 levels (doses of 0, 25, 50 and 75 g of polybag-1) while the second factor is biochar consisting of 4 levels (doses of 0, 25, 50 and 75 g of polybag-1) for each combination repeated 4 times. The parameters observed were the number of effective roots, proportion of effective nodules, plant height, number of primary branches, age of plants, age of harvest, proportion of well-fused pods, number of seeds, seed weight and weight of 100 seeds. The results showed that the interaction of vermicompost at a dose of 25 g.polybag-1 following a dose of 50 g.polybag-1 biochar increased the number of effective root nodules, the proportion of effective root nodules, the number of primary branches, the proportion of pithy pods, and accelerated plant age and soybean plant age compared without treatment but not significantly compared to other combinations.Key words : Soybean, vermicompost, biocha
HUBUNGAN STOK KARBON TANAH DAN SUHU PERMUKAAN PADA BEBERAPA PENGGUNAAN LAHAN DI NAGARI PADANG LAWEH KABUPATEN SIJUNJUNG
Get PDFThe content of soil C-organic is strongly influenced by land management. Plants tend to increase soil organic C-stock, however an increase in soil temperature can increase the rate of decomposition of soil organic matter which will reduce soil organic C-stock. The aim of the study is to look at the relationship of soil organic carbon stock (SOCS) with changes in soil surface temperature. The study was conducted using a survey method consisting of 5 stages, namely preparation, pre-survey, main survey, soil analysis in the laboratory and data processing. Soil sampling is done by purposive random sampling under several land units (LU). LU is limited by the order of the soil, slope, and land use. Based on the land unit map, we found 14 land units in the study area. Soil samples were taken at a depth of 0-20 cm. Surface temperature measurements are carried out directly in the field using a room temperature thermometer. The parameters analyzed are organic-C, organic particulate-C, and bulk density (BD). The research data were processed statistically using simple linear regression equations. The results showed that the measurement of rice field surface temperature had the highest temperature of 34 0C, and rubber plantations had the lowest temperature of 28 0C. Organic-C affects soil BD, the higher the value of organic-C, the lower the BD value. The highest carbon stock was found in soil unit 10 with rubber plantations with a slope of 8-15%, 41 kg m-2 and decreased with increasing slope. The difference in the value of SOCS in rice fields is influenced by land management, because there is no return of crops residue in the form of straw to the ground. The results of the regression analysis showed that surface temperature did not have a significant effect on the SOCS value.Keywords : carbon stock, land use, Padang Lawe
LAND CREATIONS AND FARMING SYSTEM TO INCREASE OF RICE PRODUCTIVITY AND FARMER’S INCOME (CASE STUDY IN BATANG TAMPO IRRIGATION SYSTEM - LINTAU BUO)
No full textIt is estimated that around 95 percent of national rice production is supplied from paddy fields, so the paddy fields is very strategic in national food securities. Therefore, the potential carrying capacity and productivity of rice fields must be maintained and developed. But on the contrary the productivity of paddy fields in Sub Das Tampo, Lintau Buo Utara, Tanah Datar District, West Sumatra, there is an indication of a decrease in paddy productivity in the last 10 years (Agita and Ayendra 2018). Decreased paddy productivity is indicated as a result of 1.) Drainage or nutrient deficit due to harvest carried out more than what is given through fertilization or addition of nutrients from irrigation water, 2). Excess or lack of certain nutrients due to unbalanced fertilization, 3). Decreased of soil organic content in the land and 4). Decrease in the quality of rice field management, especially: a). the use of inorganic fertilizers which causes low organic matter content and soil texture becomes porous quench, so it is less able to hold water, b). use of rotary plow in tillage for a long time which causes the processing layer and the depth of the root zone to become shallower ( into 10-15 cm), c). less intense of crop maintenance. This research was carried out by creating of soil tillage from 10-15 cm to 20-25 cm using a plow and increasing of organic matter by adding manure of 50 tons / ha (5% soil tillage zone ) to the rice fields in the Farmers Group of Tanjung Mutiara in Tampo Irrigation System, Nagari Lubuk Jantan , Kecamatan Lintau Buo Utara. The results of the study showed an increase in land productivity from an average of 3.2 tons / ha to 4.6 tons / ha and increase farmers' income by Rp 1.200.000 / ha.Key words : land creation, soil tillage, productivit
PENGARUH APLIKASI BIOCOCOTIN TERHADAP PERTUMBUHAN DAN HASIL TANAMAN SAWI PADA TANAH PASIR PESISIR PANTAI
Get PDFThe great potential in coastal sandy lands is followed by various problems and limiting factors that cause the acceleration of land use for agricultural purpose run very slowly. To overcome these limiting factors, appropriate modification and implementation of innovation is needed, namely the providing of soil conditioning materials, such as organic matter. One source of organic material that is still very rarely used, affordable, easy and cheap and simple in its application is the waste of coconut powder and human waste which we call biococotin. Providing of biococotin in coastal sandy lands decreases basic pH near neutral, increasing levels of N, P, K, C-Organic and cation exchange capacity has decreased from 7.20 to 6.40%. N levels increased from 0.021% to 0.17%, P-available increased from 2.52 ppm to 20.13 ppm, K levels increased from 2.52 cmol (+) to 9.35 cmol (+) and CEC increased from 4, 04 cmol (+) / kg becomes 7.07 cmol (+) / kg. The best growth parameters (plant height, number of leaves, longest leaf length and longest leaf width) are shown by treatment 2 which is half the dose of NPK and biococotin. The best average planting weight and yield per ha is shown by treatment 2, which is half the dose of NPK and biococotin, which is 44.03 grams / plant and 26.41 tons / ha bicocotin. Keywords : Biococotin, Coastal area, Cocopea
KARAKTERISTIK SIFAT FISIKA TANAH ULTISOL AKIBAT PEMBERIAN BIOCHAR BERBAHAN BAKU SISA TANAMAN KELAPA SAWIT
Get PDFThe physical characteristics of ultisols due to the provision of biochar made from palm oil plant residue aims to determine the effect of giving various biochar made from oil palm plant residues on the physical properties of Ultisols. The research design used completely randomized design, consisting of 5 treatments, namely K = without giving biochar, BB = oil palm stem biochar, BP = oil palm frond biochar, BT = oil palm empty bunches biochar and BK = combination of biochar ingredients. Each treatment was repeated 4 times, so that the number of experimental units became 20 units. The parameters observed included soil density, soil porosity, soil texture, soil permeability and available water. The results showed that giving biochar significantly decreased the bulk weight and significantly increased the soil porosity of Ultisols.Key words : biochar, oil palm wastes, physical properties of soil and ultiso
APLIKASI ULANG AZOSPIRILLUM TERSELEKSI PADA TANAMAN CABAI MERAH (Capsicum annum, L) YANG DITANAM PADA ULTISOL
Get PDFThe endophytic bacteria are bacteria whose life cycle is partially or completely associated in the host plant tissue in various kinds of relationships (symbiosis) that it undergoes. The potential of endophytic bacteria as microbial resources is widely used as a biological control for plants, including as the producer of phytohormones and the agent of biocontrol and biofertilizer. This study aims to test selected endophyte bacterial isolates from chili as a biofertilizer to meet the nutrient requirements that are useful during the vegetative growth period of red chili in Ultisols. The study used a completely randomized design with 4 treatments and 3 replications, namely A = fertilizer N  recommendation; B = Azospirillum sp AK+ Fertilizer N recommendation; C = Azospirillum sp BT+ Fertilizer N recommendation; D = Azospirillum sp DN+ fertilizer N recommendation. Azospirillum sp AK and Azospirillum sp DN isolates gave better vegetative growth than those of Azospirillum sp BT isolates with average dry weight, respectively, 19.49 g and 18.93 g and with a height of 29.67 cm and 29.60cm. The superiority of the 2 isolates was also shown in the observation of the number of leaves 30.39 and 22.50 and the number of branches 6.45 and 6.28 respectively for Azospirillum sp AK and Azospirillum sp DN isolates.Key words : Endophytic bacteria, red chili, Ultisol
PENGARUH SEDIAAN SALUT DAN PUPUK ORGANIK CAIR TERHADAP PERTUMBUHAN DAN HASIL KEDELAI (Glycine max L. Merril)
Get PDFPenelitian ini bertujuan untuk mengetahui interaksi pengaruh Sediaan Salut dan Pupuk Organik Cair Unitas Super terhadap pertumbuhan dan hasil kedelai (Glycine max.L Merril).  Penelitian ini menggunakan rancangan acak lengkap yang disusun secara faktorial dengan 2 perlakuan  dan 3 ulangan.  Faktor pertama sediaan salut terdiri atas 2 taraf yaitu tanpa salut SO (kontrol) dan S1 (1kg tanah + 1kg kompos + 100gr kapur +0,5 kg tanah bekas tanam kedelai + 10 gr pupuk PK), faktor ke 2 adalah aplikasi POC  yang terdiri atas 4 taraf yaitu 0 ml/L,10ml/L,20 ml/L,30 ml/L.  Hasil penelitian yang telah dilakukan menunjukkan bahwa pemberian tanpa Salut dan POC US pada taraf 30 ml/L  dapat meningkatkan tinggi tanaman, rasio tajuk akar, dan bobot 100 biji.Key words : kedelai, salut, pupuk organik cai
TITONIA DAN JERAMI PADI YANG DIKOMPOSKAN TERHADAP CIRI KIMIA TANAH DAN PRODUKSI JAGUNG PADA ULTISOL
Get PDFUltisol is broad suboptimal soils, need to be developed to increase for foods and animal feeds, but properties of physics and chemistry by the soils bad. This research was aimed to studied the influence of compost derived from titonia plus rice straw in improving chemical properties of Ultisol and corn production. This researh was conducted in glasshouse and Soil Laboratory of Agriculture Faculty, Andalas University, Padang, West Sumatra, Indonesia from January to July 2017. The experiment consisted of 5 treatments (0.00; 2.50; 5.00;7.50; 10.00 tonha-1. with 3 replications. Soil data resulted were compared to the soil criteria, while corn data were statistically analyzed the variance and continued using DNMRT at 0.05 level of significance, if F-calculated > F-table. The results of research showed that optimum dosage for repaired chemical properties of 7,50 tonha-1. It dosage soil pH 6,18 unit; available P by 17,64ppm; CEC by 18,38cmol(kg)-1; organic-C by 1,27%, total-N by 0,23%; K-exch. by 0,49cmol(kg)-1; Ca-exch. by 2,63  cmol(kg)-1; Mg-exch. by 0,57cmol(kg)-1 dan Na-exch. by 0,39cmol(kg)-1, with dry weight of seed by 85,48gpot-1; dry weight of straw by 75,84gpot-1 and dry weight of 100 seed by 25,50g. Key words : Compost derived from titonia plus rice straw, corn, Ultisol
PENGARUH PEMBERIAN DOLOMIT TERHADAP BEBERAPA SIFAT KIMIA TANAH GAMBUT DAN PERTUMBUHAN SERTA HASIL TANAMAN BAWANG MERAH (Allium ascalonicum L)
Get PDFThis research was aimed to study the effect of dolomite on chemical properties of peat soil and as well as on growth and yield of onion. The research was in form of pot experiment having 5 treatments (0 ton dolomite Ha-1 ; 2.5 ton dolomite Ha-1 ; 5 ton dolomite Ha-1 ; 7.5 ton dolomite Ha-1 ; 10 ton dolomite Ha-1) and 3 replications which were allocated in Completely Randomized Design. Parameters analyzed were pH H2O, available sulphur, available phosphorus, CEC, and exchangeable cations, as well plant height, plant dry weight, sulphur uptake, and diameter of tubers. Data resulted were analyzed the variance using F-test at 5% level of significance and then it was continued using Duncan New’s Multiple Range Test (DNMRT) at 5% level if F-test > F-table. The results showed that 10 ton dolomite Ha-1was the optimum dose to improve chemical characteristics of peat soils. It increased pH H2O by 1.16 unit, sulphur uptake by 0.005 %, available phosphorus by 5.7 ppm, CEC by 9.67 Cmol Kg-1 and exchangeable K by 0.09 Cmol Kg-1, Mg by 0.19 Cmol Kg-1, Ca by 0.31 Cmol Kg-1 compared to soil without treatment ( 0 ton Ha-1 ). It also increased production of onion, especially plant height by 22.63 cm, plant fresh weight by 43.14 g and dry weight by 2.89 g, tuber fresh weight by 21.92 g, and dry weight by 2.89 g, sulphur uptake by 0.03 %, and diameter of tubers from none to be 2.00 cm compared to soil without treatment.Key words : dolomite, peat soils, onion, soil chemical characteristic