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All Journal International Journal of Biosciences and Biotechnology Planta Tropika Jnana Karya
Bimantara, Putu Oki
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Education Engineering Environmental Science Public Health Social Sciences

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PENERAPAN UJI KESUBURAN TANAH SEBAGAI STRATEGI MENDUKUNG PEMULIHAN PRODUKTIVITAS JERUK KINTAMANI DI DESA AWAN, KINTAMANI, BANGLI Prabawa, Putu Shantiawan; Parmila, I Putu; Suarasana, Made; Suwardike, Putu; Purba, Jhon Hardy; Bimantara, Putu Oki
Jnana Karya Vol 4, No 2 (2023)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Desa Awan merupakan daerah dataran tinggi, yang terletak 4 km arah Selatan dari kota kecamatan Kintamani dan 10 km arah Barat kota Kabupaten Bangli, dengan luas wilayah 4,83 km2, dengan sebagian besar lahan digunakan untuk kegiatan pertanian, yakni seluas 216,00 Ha (0,45%). Sektor perekonomian desa Awan didominsai oleh sektor pertanian, hal ini terlihat dari prosentase penggunaan lahan untuk usaha pertanian, yakni sebesar 50%, dengan sebagian besar penduduk menggantungkan hidup dari sektor pertanian. Produk unggulan dari desa Awan adalah jeruk siam kintamani dengan aroma dan rasa khas desa Awan, namun sejak tahun 2014-2015 terjadi penurunan produksi dari jeruk desa Awan yang menyebabkan tidak terpenuhinya pasar lokal maupun nasional. Sehingga untuk mengetahui penyebabnya diperlukan identifikasi dan analisis khususnya pada kondisi hara tanah, yang dilakukan melalui program Pengabdian Kepada Masyarakat dari Prodi Agroteknologi Fakultas Pertanian Universitas Panji Sakti. Berdasarkan permasalahan yang dihadapi desa diberikan solusi berupa uji kesuburan tanah melalui laboratorium dengan pelatihan keterampilan yang diberikan ke petani berupa teknik pengambilan sampel tanah serta uji pH tanah secara langsung dengan keterampilan yang diberikan berupa penggunaan pH meter portable. Luaran akhir yang diberikan sebagai bentuk program pengabdian kepada masyarakat adalah hasil analisis kandungan hara dan bahan organik tanah, serta rekomendasi pemupukan berdasarkan hasil kandungan hara tanah desa Awan.
Effectivity Test of Compost Added By Coca-Cola Solid Waste Sludge With Water Spinach (Ipomoea Reptans POIR.) As an Indicator Arthagama, I Dewa Made; Bimantara, Putu Oki; Gunasih, Ni Made Tri; Narka, I Wayan
International Journal of Biosciences and Biotechnology Vol 11 No 1 (2023): International Journal of Biosciences and Biotechnology
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJBB.2023.v11.i01.p03

Abstract

Effectivity test of compost fertilizer added with Coca-Cola solid waste sludge with an indicator of water spinach (Ipomoea reptans POIR.), aiming to determine the effectiveness of the dose of compost added with Coca-Cola solid waste sludge to increase the yield of water spinach and improve some soil chemical properties. This research is a pot experiment in a greenhouse that was carried out in Kerambitan village, Tabanan region, Bali, Indonesia. Using a completely randomized design (CRD) consisting of 7 doses of compost added by Coca-Cola solid waste sludge. The compost that was used as a treatment was compost that had been added 20% of Coca-Cola solid waste sludge. The doses of compost tested were: K0 (control), K1 (3 tons of compost), K2 (6 tons of compost), K3 (9 tons of compost), K4 (12 tons of compost), K5 (15 tons of compost), Ka (250 kg urea + 50 kg phonska) per hectare, and each treatment was repeated 4 times so that 28 experimental pots were conducted. Parameters observed included: maximum plant height (cm), fresh plant weight at harvest, relative agronomic effectivities (RAE), oven-dry plant weight, soil pH, soil organic carbon (SOC), and soil CEC at harvest. Observational data were statistically analyzed, to determine the effect of the treatment being tried. If the treatment has a significant effect, then continue with the Duncans 5% test. The statistical analysis showed that the treatments had a significant effect on plant height growth, fresh and oven-dry weight of plants, as well as on some soil chemical properties. The heaviest fresh plant weight was obtained in treatment Ka (98.41 g), followed by K5 (98.35 g), K3 (98.33 g), and K4 (98.21 g) per pot. The highest value of relative agronomic effectiveness (RAE) was obtained in K5 (99.63 %), followed by K3 (99.58 %), and K4 (98.76 %). While the highest CEC was obtained in the treatment of K5 (40.25 me 100 g-1), K3 (39.75 me g-1) with successive organic-C levels (31.75%), (3.16 %) and pH (7.04), (7.0). The best dose of compost treatment from the results of this study was found in the K3 treatment (9 tons of compost ha-1).
Weeding Frequencies Improve Soil Available Nitrogen in Organic Paddy Field Maimunah, Margi Asih; Kautsar, Valensi; Bimantara, Putu Oki; Kimani, Samuel Munyaka; Utami, Asih Indah; Sabri, Riza Kurnia; Tawaraya, Keitaro; Utami, Sri Nuryani Hidayah; Purwanto, Benito Heru; Cheng, Weiguo
PLANTA TROPIKA Vol 10, No 1 (2022)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v10i1.12707

Abstract

Appropriate weeds control is needed against weeds constraints in field, especially the organic field. With the appropriate management, weeding would benefit the organic field not only in reducing weeds but also in increasing nitrogen (N) availability in organic rice fields. This research aims to observe soil available N changes affected by weeding frequencies in organic paddy fields. Treatments applied were five weeding frequencies (WF) such as 0 WF, 2 WF, 4 WF, 6 WF, and 8 WF, to study the effect of various weeding frequencies on soil total N and available N ( NH4+ and NO3–) in the organic rice field. The soil in the conventional field was analyzed as a comparison to organic field soil. The results showed that soil C and N contents are similar in all treatments. Meanwhile, 6 WF performed the highest soil  NH4+ among organic plots (10.36 mg N kg–1) and 8 WF enhanced soil NO3– to the highest average among all plots (10.12 mg N kg–1). The treatment of 6 WF and 8 WF also maintain the increase of soil  NH4+ to 51 days after transplanting (DAT), meanwhile 0 WF, 2 WF, and 4 WF decreased after 40 DAT. Water samples from fields inlet-outlet and river showed that  NH4+ content found in water sample was higher than NO3–. We concluded that the more frequencies of weeding applied to organic fields potentially preserved soil inorganic N longer, which is very important in supporting rice growth. 
Co-Authors Benito Heru Purwanto Gunasih, Ni Made Tri I DEWA MADE ARTHAGAMA I WAYAN NARKA Keitaro Tawaraya Kimani, Samuel Munyaka Maimunah, Margi Asih Parmila, I Putu Prabawa, Putu Shantiawan Purba, Jhon Hardy Putu Suwardike Sabri, Riza Kurnia Sri Nuryani Hidayah Utami Suarasana, Made Utami, Asih Indah Valensi Kautsar, Valensi Weiguo Cheng, Weiguo