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The Role of Organic Matter to Improve Phosphate Fertilization Efficiency on Acid Sulphate Soil SUSILAWATI, ANI; FAHMI, ARIFIN
Jurnal Sumberdaya Lahan Vol 5, No 01 (2011): Juli 2011
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

The large amount of acid sulphate soil area may be potential for agricultural development. Low soil pH, low to very low P availability and high Fe concentration are the dominant characteristics of acid sulphate soils. Low availability of P in acid sulphate soil may due to fixation process by iron and aluminum. Low N, low available K, and potential toxicityof Fe and Al are other characteristics of acid sulphate soil. Optimum agricultural management practices are required to leach the excess of Fe2+ and to maximize the P availability in order to obtain favourable conditions for rice growth. Rice straw application is part of technology for acid sulphate soil productivity improvement, a simple tecnology that sustainable and environmental friendly. Organic matter being a source of nutrients has also an important role in relation to P sorption capacity of soils through Fe chelation processes.
TEKNOLOGI PENURUNAN KADAR Fe AIR SAWAH PASANG SURUT MELALUI PENGGUNAAN BIOFILTER PURUN TIKUS (Eleocharis dulcis) [Fe Levels Decline Technology of Water Tidal Rice Field by Using Purun Tikus (Eleocharis Dulcis) Biofilter ] Susilawati, Ani; Indrayati, Linda
BERITA BIOLOGI Vol 15, No 1 (2016)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

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Abstract

Water management in acid sulfate soil can increase the productivity of land and crops, but the element of poison leaching into drainage channels gives negative impact on the environment. One approach to improve water quality is to filter or absorb the poison element. Purun tikus (Eleocharis dulcis) can act as a biofilter to improve water quality. The purpose of this study is to get biofilter technology (purun tikus) to reduce the levels of Fe, SO4 and increase the pH of the water. The experiment was conducted in greenhouse of Indonesian Swampland Agriculture Research Institute, Banjarbaru, South Kalimantan. Treatment was arranged in a factorial randomized block design with three replications.The first factor was the density of the biofilter ,consisted of: 1) 25%, 2) 50%, and 3) 100%, The second factor was the length of contact of water with biofilter that consisted of: 1). 12 hours, 2) 24 hours, and 3) 36 hours. The results showed that the density of purun tikus 50% in greenhouse experiments can decreased the concentration of Fe at 76.5%.
PENGARUH PERENDAMAN BENIH DALAM CaO DAN PEMUPUKAN P DAN K TERHADAP PENGENDALIAN KERACUNAN BESI PADA TANAMAN PADI DI LAHAN SULFAT MASAM POTENSIAL Susilawati, Ani; Khairullah, Izhar
BERITA BIOLOGI Vol 10, No 4 (2011)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

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Abstract

Tidal land large enough sour sulfate and the potential for agricultural expansion. Obstacles encountered primarily stress iron poisoning. It has the potential to cause a decline in rice yield research aims to study the effect of the influence of seed treatment and fertilizer P and K to control iron toxicity in acidic sulfate potential land. This research was carried out in KP Belandean on MK 2007. Randomized block design with 3 replications. Rice varieties used were Batanghari, planted on plot measuring 4 mx 9 m with a spacing of 20 cm x 20 cm. Package combined treatment of seeds and fertilizer P and K: 1. (25-90-75), 2. (50-90-75), 3. (75-90-75), 4. (100-90-75), 5. (125-90-75), 6. (75-30-75), 7. (75-60-75), 8. (75-120-75), 9. (75-150-75), 10. (75-90-25), 11. (75-90-50), 12. (75-90-100), 13. (75-90-125), 14. (0-90-75), 15. (0-0-0) kg / ha% CaO-kg / ha P2O5-K2O. The result showed that by giving a dose of phosphate fertilizer 90 kg/ha P2O5 and potassium at a dose of 100-125 kg/ha K2O CaO combined with the provision of 75 % of the weight of the seed, is the combination to control iron poisoning.
BIOLEACHING UNTUK MENINGKATKAN PRODUKTIVITAS LAHAN SULFAT MASAM AKTUAL UNTUK TANAMAN PADI Maftu’ah, Eni; Susilawati, Ani
BERITA BIOLOGI Vol 17, No 3 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

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Abstract

Technology of microbial utilization to accelerate the oxidation of pyrite followed by leaching (bioleaching) has the potential to resolve problems in land management of actual acid sulphate soil. The research aims to obtain a bioleaching technology package that can improve the productivity of the actual acid sulfate soil. The experiment was conducted on tidal swamp land that has soil type of actual acid sulfate at Wana Raya sub-district, district Batola, South Kalimantan, in July - November, 2014. The study was designed by using strip plot with three replications. The treatment consisted of two factors, namely application of an oxidizing microbial pyrite and leaching amount (intensity). The main plot consisted of (P0) without leacing (naturally), (P1) six times leaching , (P2) eight times leaching, and (P3) 12 times leaching. Subplot consisted of (M0) without oxidizing microbial pyrite, (M1) with oxidizing microbial plant used in this study is Inpara 3 of rice variety. Observations were made on soil pH, oxidizing bacteria pyrite, growth of rice plants (plant height and number of tillers) and rice yield. The results showed that the main problem of actual acid sulfate land studied is a high soil acidity (pH of 3.44). Influ-ence of leaching was greater than microbial application on crop yields. Application of the pyrite oxidizing bacterial and leaching eight times gave the best influence on the growth and yield of rice plants.
Pengembangan Teknologi Untuk Pengelolaan Lahan Rawa Pasang Surut Berkelanjutan Susilawati, Ani; Wahyudi, Erwan; Minsyah, Nurimdah
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol 6, No 1 (2017): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Abstract

Susilawati et a, 2017. Technology Development for Sustainable Tidal Swamp Land Management. JLSO 6(1):87-94.Tidal land is very potential to be developed as food gardens and agriculture of the future of Indonesia considering (1) productivity is still low, (2) potential land is still wide, (3) indices of plantation (IP) is still low, (4) degraded land potential , (5) the pattern of food production in tidal land is complementary to the pattern of food production in Java, (6) the competition for land use for non-agricultural purposes is relatively low, and (7) the availability of production technology of various commodities. Tidal land is an area whose water availability is affected by the movement of water on the surface of the river due to the movement of the moon, the land is included in the sub-optimal land category, ie the land that has many problems and needs to be overcome in order to provide benefits. The problems are water problems and soil chemical characteristics that have not provided maximum support for agricultural cultivation system. Therefore, priority should be given to technological development that is technically relevant to the characteristics of the land, economically affordable to local farmers, and expected to be in tune with the preferences and socio-cultural of local communities. Two approaches that can be parallel and interactively carried out are [1] optimizing the physical, chemical, and (micro) properties of soil biology along with optimizing the management of water resources to be eff ective and more efficient; and [2] appropriate selection of commodity types and development of adaptively specific varieties for each suboptimal land characteristic.
Ketersediaan Lahan Mendukung Ekspor Jagung Kabupaten Bengkayang ke Malaysia Masganti, Masganti; Susilawati, Ani; Yasin, Muhammad
Jurnal Sumberdaya Lahan Vol 11, No 2 (2017)
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Abstrak. Jagung merupakan tanaman multifungsi, tetapi di Indonesia lebih banyak dimanfaatkan untuk bahan pakan ternak. Kelangkaan komoditas ini di pasaran berefek ganda terhadap industri pakan, harga pakan dan harga ayam potong dan telur. Kebijakan Pemerintah melarang impor jagung dan mengekspor 3,0 juta ton jagung ke Malaysia perlu didukung secara penuh dan konsisten. Kabupaten Bengkayang merupakan sentra produksi jagung Kalimantan Barat dengan kontribusi 76,71%. Petani di kabupaten ini sudah terbiasa membudidayakan jagung dengan rata-rata produktivitas 4,07 t ha-1. Dari 17 kecamatan yang ada, semuanya mempunyai tradisi menghasilkan jagung. Peningkatan produksi jagung melalui perluasan areal tanam dengan memanfaatkan sekitar 183.934,5 ha lahan yang merupakan (1) perluasan areal tanam melalui pemanfaatan lahan kehutanan APL dan HP, (2) tumpangsari dengan tanaman perkebunan, (3) optimasi lahan bera, dan (4) intensifikasi daerah sentra produksi. Dengan memanfaatkan lahan tersebut, Kabupaten Bengkayang berpotensi menghasilkan 665.434 ton jagung pipilan kering atau setara dengan 21,85% quota ekspor jagung ke Malaysia. Perluasan areal tanam jagung di Kabupaten Bengkayang perlu didukung oleh hal-hal teknis seperti (a) ketersediaan tenaga kerja yang terampil, Alsintan (pengolah tanah, pemeliharaan, pemanen, dan pemipil, dryer), lantai jemur, air, saprodi (benih, insektisida, herbisida), dan pupuk organik, (b) pendampingan teknologi dari penyuluh dan peneliti, dan (c) kelembagaan seperti kios saprodi dan organisasi petani.
Influence of Height Waterlogging on Soil Physical Properties of Potential and Actual Acid Sulphate Soils Fahmi, Arifin; Susilawati, Ani; Rachman, Ahmad
Journal of Tropical Soils Vol 19, No 2: May 2014
Publisher : UNIVERSITY OF LAMPUNG

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Abstract

Water management is main factor that determines the successful of rice cultivation in acid sulphate soil. Soil waterlogging determines the direction and rate of chemical, geochemical and biological reaction in the soil, indirectly these reactions may influence to the changes of soil psycal properties during soil waterlogging process. The experiment was aimed to study the changes of two type of acid sulphate soils physical properties during rice straw decomposition processes.  The  research  was  conducted  in  the  greenhouse  consisting  of  the  three  treatment  factors  using  the completely randomized design with three replications. The first factor was soil type: potential acid sulphate soil (PASS) and actual acid sulphate soil (AASS). The second factor was height of water waterlogging: 0.5-1.0 cm (muddy water–level  condition) and 4.0 cm from above the soil surface (waterlogged). The third factor was organic matter type: rice straw (RS), purun tikus (Eleocharis dulcis) (PT) and mixed of RS and PT (MX). Soil physical properties such as aggregate stability, total soil porosity, soil permeability, soil particle density and bulk density were observed at the end of experiment (vegetative maximum stage). The results showed that acid sulphate soil type had large effect on soil physicl properties, soil waterlogging decreased aggregate stability, soil particle density and bulk density both of soil type.Keywords : Acid sulphate soils, soil physical properties, and waterlogging [How to Cite: Arifin F, A Susilawati and A Rachman. 2014. Influence of Height Waterlogging on Soil Physical Properties of Potential and Actual Acid Sulphate Soils. J Trop Soils 19(2): 77-83. Doi: 10.5400/jts.2014.19.2.77]
PENERAPAN MODEL PEMBELAJARAN COOPERATIVE SCRIPT UNTUK MENINGKATKAN KEAKTIFAN SISWA DALAM PEMBELAJARAN PPKn DI MTSN 4 GUNUNGKIDUL Susilawati, Ani
Diksi Vol 26, No 1: DIKSI MARET 2018
Publisher : Faculty of Languages and Arts, Universitas Negeri Yogyakarta

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Abstract (Title: Application of Cooperative Script Learning Model to Improve the Activities of Students in PPKn Learning in MTsN 4 Gunungkidul). This study aims to describe the application of cooperative script learning models to increase the activity of students in learning PPKn material position and function of the Pancasila class VIIIA MTsN 4 Gunungkidul. The population of this study was all students of class VIII A MTsN 4 Gunungkidul in Gunungkidul Regency with a total of 34 children. All members of the population are used as research samples. Data collection is done by observation. This observation is carried out to monitor the process and impact of learning needed to organize corrective measures to be more effective and efficient. Observation is focused on the process and results of the learning action along with the events that surround it. The results of the study showed that students' activities in learning had shown high participation, students were able to build cooperation in groups to solve problems faced. Students are able to solve problems, answer questions, present work results well. This shows the activity of students towards subjects is quite high with an average of 55% before the action becomes 76% in the first cycle and becomes 87% in the second cycle. Students' responses to the subjects of Education Authority turned out to be influenced by the learning model used by the teacher. This can be seen from the results which show an increase from the first cycle of 76.9% to 92.3% in the second cycle.Keywords: activity, cooperatif script, participation, Pancasila