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All Journal Biodiversitas Journal of Biological Diversity
NURHENI WIJAYANTO
Department of Silviculture, Faculty of Forestry and Environment, Institut Pertanian Bogor. Jl. Ulin, IPB Dramaga Campus, Bogor 16680, West Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Growth and productivity of stevia variety Cibodas Manis 3 (Stevia rebaudiana) in 40 days planting with agroforestry MILA NADIA CHOERIAH; NURHENI WIJAYANTO; IRMANIDA BATUBARA
Biodiversitas Journal of Biological Diversity Vol. 25 No. 7 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250749

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Abstract. Choeriah MN, Wijayanto N, Batubara I. 2024. Growth and productivity of stevia variety Cibodas Manis 3 (Stevia rebaudiana) in 40 days planting with agroforestry. Biodiversitas 25: 3277-3283. Stevia (Stevia rebaudiana Bertoni.) is a shrub plant that can be used as a substitute for sugar cane and has the potential to be cultivated in agroforestry ways. This study aims to analyze the growth and productivity of stevia in agroforestry systems compared to monocultures. Stevia was planted in 2 types of land, namely agroforestry and monoculture. The research location's soil and area's climatic conditions were observed stevia agroforestry was grown under pine, eucalyptus, and coffee trees. During stevia planting, the height was measured. Stevia was harvested 40 days after planting, and leaf area, number of leaves, leaf weight, and harvest productivity were measured. In addition, chlorophyll and stevioside yields were analyzed using UV VIS and LC-MS/MS spectrometry. Stevia in agroforestry land had higher chlorophyll and stevioside content than monoculture, although not as good as stevia in monoculture, which had higher height, number of leaves, leaf area, wet weight, dry weight, and productivity compared to agroforestry. The total stevioside produced from agroforestry land was 1.63 kg/ha, while it was 2.19 kg/ha from monoculture land. Stevia in agroforestry land also has a higher secondary metabolite content than in monoculture. This is related to the growing conditions that stress stevia. Pearson correlation test results also show a relationship between the amount of chlorophyll and the stevioside content in stevia plants.
Species composition, stand structure, and carbon stock in the agroforestry system of Wana Lestari Community Forestry, West Nusa Tenggara, Indonesia RAHMA DWI AKDAH; NURHENI WIJAYANTO; ADISTI PERMATASARI PUTRI HARTOYO
Biodiversitas Journal of Biological Diversity Vol. 25 No. 9 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250957

Abstract

Abstract. Akdah RD, Wijayanto N, Hartoyo APP. 2024. Species composition, stand structure, and carbon stock in the agroforestry system of Wana Lestari Community Forestry, West Nusa Tenggara, Indonesia. Biodiversitas 25: 3350-3358. Climate change is characterized by shifting climate patterns that result in erratic weather phenomena. One of the major consequences of climate change is the reduction in biodiversity and the increased concentration of greenhouse gases (GHGs), primarily carbon. Agroforestry systems (AF) have emerged as a potential solution to mitigate these effects by conversing biodiversity and enhancing carbon stocks. This study aims to analyze the species composition and structure of tree stands and estimate the carbon stock in the AF of the community forest (HKm). The methods used employed included vegetation analysis, stand structure measurement using the Spatially Explicit Individual-based Forest Simulator (SExI-FS), and carbon stock estimation using allometric equations and destructive approaches for seedlings and understory levels. A total of 25 plots, each measuring 20×20 m, were used for data collection. The results show that the species composition in HKm Wana Lestari consists of 63 plant species from 40 families. The highest importance value index (IVI) was recorded for durian (Durio zibethinus Murray) at the pole growth level (90.34%), while coffee (Coffea robusta L.Linden) emerged as the dominant species within the agroforestry system. The diversity index (H') ranged from 0.40 to 2.29, indicating a medium category of diversity. The stand structure did not follow the expected "J" curve pattern. The total biomass and carbon stock across all growth levels were found to be 228.35 and 107.22 tons/ha, respectively. In conclusion, the agroforestry system in HKm Wana Lestari demonstrates notable species diversity and carbon storage potential, although its stand structure deviates from the ideal "J" curve, suggesting opportunities for further forest management improvements.
Co-Authors ADISTI PERMATASARI PUTRI HARTOYO IRMANIDA BATUBARA MILA NADIA CHOERIAH RAHMA DWI AKDAH