Abstract. Satriawan H, Fuady Z, Ernawita. 2020. The potential of Asystasia intrusa weed as a cover crop in oil palm plantations. Biodiversitas 21: 5711-5718. Weeds generally found in oil palm plantations, one of which is dominant is Asystasia intrusa. This weed has begun to be used as a cover crop on oil palm land because it is assumed to have a beneficial effect. The purpose of this research is to explore the potential of Asystasia intrusa in growing as a cover crop on oil palm plantations. The experimental arrangement used was split-plot design. Oil palm plan’s ages were used as the main plot, while the spacing plant (Asystasia intrusa) as the subplots. Experiments were done in triplicate. The results showed that Asystasia intrusa has the potential to be used as a cover crop in oil palm plantations, since it meets several requirements, such as quickly covering the land (12 WAP), fast decomposing (30-60 days), tolerance to shade. This was indicated by the growth percentage of 97.56%, containing nutrients N (1.65-1.77%), P (0.29%), and K (4.6-4.97%), as biomass (0.9 t C/ha/year) and soil carbon stocks (39.52-41.16 t/ha/year). The studied weed also has the ability to increase soil carbon stock up to 119%.
Abstract. Satriawan H, Fuady Z, Ernawita. 2021. The potential of Nephrolepis biserrata fern as ground cover vegetation in oil palm plantation. Biodiversitas 22: 4808-4817. Nuisance plants or weeds are commonly found in agricultural landscapes including in oil palm plantations. Despite being considered as weeds, several of them have the potential to be used as ground cover vegetation including Nephrolepis biserrata (Sw). Schott. This fern species exhibits beneficial characteristic as ground cover plant especially in terms of the contribution of organic matter and soil moisture through the prevention of evapotranspiration. The objective of this research is to explore the potential of N.biserrata as ground cover vegetation in oil palm plantations based on the assessment of its ecological characteristics regarding the growth and decomposition rate, tolerance to shade, organic contents and carbon accumulation. The split plot experimental design was used with the age of oil palm plants was used as main plot while in the sub-plots the spacing of N. biserrata was used at three varying distances 10x10cm, 20x20 cm, and 30x30 cm, each treatment had three replicates. Nine parameters observed were the percentage of growth, the percentage of ground cover, plant height, fronds number per plant, leaves number per plant, Leaf Area Index, dry weight (g), nutrient content in plant tissue, and potential carbon stock. Results showed that N. biserrata showed rapid growth in covering the ground surface (8-12 weeks after planting), had rapid decomposition rate (30-60 days), tolerant to shading which was characterized by the highest percentage of growth up to 81.16% and covering area up to 95.9%, accumulated organic contents of N (1.23-1.53%), P (0.18-0.22%), and K (1.4-1.67%), respectively. In addition, total dry weight biomass obtained was 27.1 ton/ha, accumulated carbon in plant of 0.9 tons C/ha/year, and amount of soil carbon stock 76.4-97.4 tonnes/ha/year. The results of this study suggest that Nephrolepis biserrata is a potential plant to be utilized as a ground cover plant in oil palm plantations.
Environments in which oil palms grow involve some components and production resources crucial in increasing the development of integrated palm oil plantation systems without damaging the environment. This study aimed to determine strategies and direction of the development of oil palm-cattle integration and improve the regional economy. The primary data were obtained through questionnaires by interviewing 50 respondents, which comprised cattle farmers and experts /stakeholders of Almuslim University and STIE Kebangsaan Bireuen and local government agencies directly involved with the study topics. AHP and SWOT were used to analyze oil palm-cattle integration strategy development data. The main findings of the study require main strategies: 1) Increasing the efficiency of oil palm-cattle integration from extensive to intensive model with the support of stakeholders; 2) Creating an effective and successful pilot cattle farmer groups in carrying out oil palm-cattle integration by utilizing cheap and nutritious feed from oil palm plantations; 3) Utilizing cow dung as fertilizer and biogas as a source of income for farmers; 4) Expanding cattle farmer's knowledge on the development of beef cattle population and livestock health services; 5) Increasing active government participation in facilitating cattle and oil palm farmers in integration implementation, and 6) Utilizing financial institutions/banking services to increase business capital which will aid in increasing beef cattle population and oil palm production.
Abstract. Satriawan H, Nazirah L, Fitri R, Ernawita. 2022. Evaluation of growth and yield of upland rice varieties under various shading levels and organic fertilizer concentrations. Biodiversitas 23: 2655-2662. The present study aimed to reveal the effect of shading treatments and organic fertilizer dosages on the growth and yield of several upland rice varieties. A split-split plot experimental design with 3 factors was used in this study, consisting of shading levels as the main plot (0%, 30%, 60%), organic fertilizer as a sub-plot (0 g/plant, 25 g/plant, 50 g/plant, and 75 g/plant) and upland rice varieties as sub-sub plot (Ciherang, Situ Bagendit, Kabir 07 and Malaysian upland). Parameters observed were plant height and tiller numbers (expressed as area under the curve), panicle number, dry hay weight, grain weight, flowering time, and chlorophyll number. Results showed that shading treatments significantly affected panicle number, grain weight, and dry hay weight (0% and 30% shade showed the highest result with no significant differences; while 60% shades showed the lowest results); varieties are an important determinant in tiller numbers (Malaysian upland, Ciherang, Situ Bagendit and Kabir 07 with 798.33 ±7.76 and 792.71 ± 9.4, 764.38 ±8.75 and 738.33 ± 14.84, consecutively) and panicle numbers (Ciherang, Situ Bagendit, Malaysian upland and Kabir 07 with 46.51 ± 5.97, 45.26 ±5.68, 44.31 ± 5.09, and 41.08 ± 5.92, consecutively); while organic fertilizer dosages significantly affected tiller numbers in which 26 t ha-1 and 8 t.ha-1 were the highest and the lowest tiller number observed, respectively. Shade and variety interaction significantly affected plant height and flowering time, while interactions of varieties and organic fertilizer dosages are significant on tiller number, panicle number, grain weight, and dry hay weight. The highest total chlorophyll number was shown by Situ Bagendit variety (144.44 granules mm-2) at 60% shading level, while Kabir 07 (98.8 granules mm-2) at 30% shading level showed the lowest total chlorophyll number. It can be concluded that organic fertilization significantly affected the growth and production of upland rice varieties compared to shading treatments. Thus, upland rice cultivation under shading conditions is the potential to be developed, particularly with appropriate rice varieties and optimum organic fertilization techniques.
Sel surya berpewarna tersensitisasi atau dikenal dengan dye-sensitized solar cell (DSSC) dengan menggunakan semikonduktor tipe-n dan tipe-p serta ekstrak jeruk Mentui (khas Aceh) sebagai biomolekul pewarna sensitisasi (dye) telah difabrikasi dan dikarakterisasi. Sebagai pembanding, ekstrak jeruk nipis dan jeruk purut juga digunakan. Ekstrak jeruk mentui berdasarkan spektrum inframerah mengandung berbagai macam karotenoid dan flavonoid seperti beta karoten, hesperidin, lutein, naringin, quersetin, tangeretin, dan zeaxanthin. Karakteristik optik ekstrak jeruk Mentui juga menunjukkan nilai absorptivitas molar yang cukup tinggi sehingga dapat digunakan untuk pembuatan DSSC. Hasil pengujian arus-tegangan menunjukkan hasil bahwa penggunaan ekstrak jeruk Mentui pada semikonduktor tipe-n mampu menghasilkan efisiensi yang lebih besar daripada semikonduktor tipe-p. Adapun tegangan rangkaian terbuka (VOC) dan faktor pengisian (fill factor, FF) relatif sama untuk semua jenis ekstrak jeruk yaitu VOC ~ 0.340 V dan FF ~ 0.4. Rapat arus pada rangkaian singkat terbesar (Jsc = 1.21 mA·cm-2) dihasilkan DSSC dengan molekul pewarna ekstrak jeruk mentui.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.