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Kandungan Hara N, P, K pada Gawangan dan Jalan Panen Perkebunan Kelapa Sawit Ismi Nuryenti; Dwi Probowati Sulistyani; Siti Masreah Bernas
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 5 No. 2 (2016): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Nuryenti, et al.Â Content of Hara N, P, K on Gawangan and Harvest Road Oil Palm Plantation. JLSO 5(2):219-224.Â Differences in the location of oil palm plantations cause differences in nutrient content contained in the soil. This study aims to analyze the nutrient content of N, P, K of soil on gawangan and harvest road in PT. Sawit Mas Sejahtera. The method used is a detailed survey method with an observed area of 3 ha. Soil analysis results in nutrient content of N, P, K on harvest road showed higher yield compared to gawangan. N-total value on gawangan 0.11% and 0.16% Â harvest road, P-bray value on gawangan 6.15 ppm and 15 ppm harvest road, K-dd value on gawangan 0.10 me/100 g and 0.41 me/100 g harvest road. Soil pH on harvest road and gawangan is a very low pH soil ranging from 3.84 to 4.22. Palm oil production may increase by adding calcification first before the application of N, P, K fertilizer especially on harvest road to improve soil fertility and produce optimal production.

Pengaruh Pupuk Urea dan Mineral Zeolit terhadap Emisi Karbondioksida (Co2) pada Pertanaman Padi (Oryza Sativa L.) di Tanah Gambut Muh Bambang Prayitno; Hendri Dunand; Dwi Probowati Sulistyani
Seminar Nasional Lahan Suboptimal 2019: Prosiding Seminar Nasional Lahan Suboptimal “Smart Farming yang Berwawasan Lingkungan untuk Ke
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Prayitno MB, Dunand H, Sulistyani DP. 2019. The influence of urea fertilizer and zeolite minerals on carbon dioxide (Co2) emissions on the rice plant (Oryza Sativa L.) in peat soil. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal 2019, Palembang 4-5 September 2019. pp. 437-444. Palembang: Unsri Press. This study aims to determine the effect of nitrogen and zeolite fertilization on CO2 emissions in paddy rice plantation in peat soils. The study was conducted in the greenhouse of the Faculty of Agriculture, Sriwijaya University, Inderalaya, South Sumatra Province, from September to December 2018. The results of this study indicate that the treatment of nitrogen fertilizer produces the highest CO2 emissions in the production phase of the U3 treatment (average emissions: 3.80 mg/plant/day) and the lowest emissions in the vegetative phase (age 55 days) on the U2 treatment (average emissions: 2.41 mg/plant/day). The zeolite treatment produced the highest CO2 emissions in the production phase of Z1 treatment (average emission: 3.82 mg/plant/day) and the lowest emissions in the generative phase (age 65 days) on treatment Z1 (average emission: 2.43 mg/plant/day). The highest CO2 emission from the combination of nitrogen and zeolite fertilizers is in the rice production phase U2Z3 (3.95 mg/plant/day) and the lowest CO2 emission at 55 days on treatment U2Z1 (2.22 mg/plant/day).Keywords: peat soils, CO2 emissions, paddy rice, urea fertilizer, zeolite minerals

Patogenisitas isolat bakteri entomopatogenik Bacillus thuringiensis diisolasi dari Spodoptera litura terhadap larva Plutella xylostella (Lepidoptera:Plutellidae) Yulia Pujiastuti; Suparman SHK; Dwi Probowati Sulistyani
Seminar Nasional Lahan Suboptimal 2021: Prosiding Seminar Nasional Lahan Suboptimal ke-9 “Sustainable Urban Farming Guna Meningkatkan
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Pujiastuti Y, SHK Suparman, Sulistyani DP. 2021. Patogenicity of entomopathogenic Bacillus thuringiensis isolated from Spodoptera litura against Plutella xylostella larvae (Lepidoptera:Plutellidae). In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-9 Tahun 2021, Palembang 20 Oktober 2021. pp. 621-627. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI). Diamondback moth, Plutella xylostella is an important insect pest on plants belong to Brassicaceae family. Symptoms of attack is hollow leaves and leave dirt on them. If it is not controlled, the yield loss can reach 80%. Control by using biological agents entomopathogenic bacteria Bacillus thuringiensis may be used to reduce the population of P. xylostella. The purpose of research was to study the pathogenicity of B. thuringiensis isolated from cadaver of Spodoptera litura against P. xylostella larvae in the laboratory. The treatments were two isolates of B. thuringiensis encoded SlBt01 and SLBt03. The experiment was designed with a completely randomized design (CRD) separated between isolates. The treatment consisted of 5 treatments (including control) spore density and 5 replications. Observations were mortality rate and time of death of the test larvae. Results showed the highest mortality was in isolate SlBT01 (61.73%) and in isolate SlBt03 (56.66%). The lowest LT50 values of isolates SlBt01 and SLBt03 were 9.78 days and 9.14 days, respectively. Symptoms of infection in Plutella larvae are changes in body color and eventually die with symptoms of wet rot.

Pupuk Organik Cair (Poc) dari Limbah Cair Tahu dengan Dekomposer Bongkol Pisang Dalam Pertumbuhan Tanaman Pokcay Dwi Probowati Sulistyani; Adipati Napoleon; Agus Hermawan; Bakri Bakri; Warsito Warsito; M Farrel Rayhan Riza
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Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Sulistyani DP, Napoleon A, Hermawan A, Bakri B, Warsito W, Riza MFR. 2022. Liquid organic fertilizer (Poc) from tofu liquid waste with banana hump decomposer in pokcay plant growth. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-10 Tahun 2022, Palembang 27 Oktober 2022. pp. 129-135. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Tofu liquid waste can be used as a new alternative that can be used as liquid organic fertilizer because in the tofu liquid waste it has various nutrients needed for the plant growth process. Based on the research, it shows that the nutrient content in tofu liquid waste before and after liquid fertilizer is made does not meet the standard of liquid fertilizer. To improve the quality of tofu liquid waste as liquid fertilizer, one of them is the addition of local microorganisms (MOL) from banana hump. The specific purpose of the study was to determine the effect of liquid organic fertilizer from tofu liquid waste with the addition of a banana hump decomposer on pokcay plants. Liquid organic fertilizer is one of the efforts to improve the physical and chemical properties of the soil, one of which is Ultisol, so it is expected to increase the growth of pokcay plants to be applied. Ultisols include soils that have very low nutrients and high soil acidity. Poor macronutrient content. Therefore, researchers made efforts so that ultisols could increase the availability of soil nutrients. Liquid organic fertilizer has many advantages, namely the ease of application to soil and plants, which only needs to be watered. The results showed that there was an effect of the dose of liquid organic fertilizer sprinkled on the soil planted with pokcay on the growth, namely plant height, number of leaves, leaf green level, wet weight and dry weight.

Pengaruh Pemberian Kapur Dolomit dan Pupuk Urea terhadap Emisi Gas Karbon Dioksida (CO2) pada Tanaman Padi (Oryza sativa L.) di Tanah Gambut Muh Bambang Prayitno; Lisa Erlita; Dwi Probowati Sulistyani
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Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Prayitno MB, Lisa E, Sulistyani DP. 2022. The effect of dolomite lime and urea fertilizer treatments on carbon dioxide (CO2) emissions in rice plants (Oryza sativa L.) on Peat Soil. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-10 Tahun 2022, Palembang 27 Oktober 2022. pp. 234-242. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).The study was conducted to determine the effect of treatment of dolomite lime and urea fertilizer on CO2 gas emissions in rice plants on peat soil. The research was carried out at the ATC Greenhouse, Faculty of Agriculture, Sriwijaya University, Indralaya, from March to June 2020.The research design was a Completely Randomized Factorial Design (RALF) with two factors, namely dolomite lime and urea fertilizer.Observations of gas emissions were carried out in various vegetative, generative and production phases. Gas capture is carried out with a closed chamber and then inserted into a vacuum tube. Carbon dioxide gas analysis was carried out in the laboratory of the Agricultural Environmental Research Institute, Ministry of Agriculture, Pati, Central Java. The results showed that the increase in urea fertilizer application decreased CO2 gas emissions at 30 DAP, 84 DAP and 100 DAP, but on the contrary there was an increase at 70 DAP. The lowest CO2 emissions in the vegetative, primordia, generative and production phases were U2D0, U2D2, U0D2 and U1D2, respectively.

Kualitas Fisik Pupuk Cair (Biourine) Kambing Dengan Penambahan Berbagai Jenis Dekomposer Dalam Rangka Perbaikan Tanah Sebagai Media Tanam Dwi Probowati Sulistyani; Adipati Napoleon; Yaswan Karimuddin; Sofia Sandi; Ida Aryani
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Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Sulistyani DP, Napoleon A, Karimuddin Y, Sandi S, Aryani I. 2020. Quality of physical properties of goat fertilizer (Biourine) with the addition of various types of decomposers to improve soil properties as a planting media. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang 20 Oktober 2020. pp. xx. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).The study aimed to identify physical qualities liquid fertilizer ( biourine ) goat by the addition of various types of decomposer.The materials used in the research areu urine goat, EM-4, banana excrescence and feces goats. This study conducted in ekperimental with 4 treatment by 3 deuteronomy consisting of PO(urine goats + mol banana excescence), P2(1 urine goat + mol feces goats), P3 (urin goats+ mol EM-4). Parameter that measured in research is the quality of the physical namely the odor , pH , temperature and the color of the data obtained analyzed in deskriptip. The research results show that treatment of temperature at P0 34oC, treatment P1, P2 and P3 of 32oC.Color biourine treatment P0 is reddishblack and P1, P2 and P3 is reddishblack, black concentrated. Odorbiourine goat treatment P0 is very stinging and P1, P2, and P3 is stinging. Ph around 7,67-8,29 . treatment.Conclusion is the banana mol excrescence, mol feces goats and EM-4 can fix in soil as media plant.

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