Akas pinaringan Sujalu
@untag-smd.ac.id
Agrotechnology/Agriculture
universitas 17 agustus 1945 samarinda
EDUCATION
Geofisich and Meteology-IPB (graduate)
Forestry (Magister and Doctoral)
RESEARCH INTERESTS
Agriculture, climate, biodiversity (ephiphyte), water management
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Z Yahya, A P Sujalu, L Kamarubayana, H Emawati, M Napitupulu, Ismail ismail, and Noor Jannah
IOP Publishing
Abstract Epiphytes are one of the most diversiform plants, which its species richness peak in the tropic and subtropics. The objective of this study is to explore the different types of phorophyte. This research used the single plot method, as many as 100 plots, each measuring 10m x 10m, randomly distributed in Main Protected Zone of the Samarinda Botanical Garden. In each plot, the following data recorded the species name and individual numbers of phorophytes. The phorophyte in the old secondary forest area to the amount of 66 trees are consisting of 30 species of 29 families. The number of phorophytes is mostly in the diameter class between 21-38 cm. The Family of Dipterocarpaceae and species of Borassodendron borneensios, being the phorophyte which has got the most one in which each 8 species and 9 trees are existed in the forest.
Teguh Harjana, Eddy Hermawan, Risyanto, Anis Purwaningsih, Dita Fatria Andarini, Ainur Ridho, Dian Nur Ratri, and Akas Pinaringan Sujalu
Springer Nature Singapore
Zuhdi Yahya, Puji Astuti, Zikri Azham, Maya Preva Biantary, Lisa Astria Milasari, and Akas Pinaringan Sujalu
Springer International Publishing
Anis Purwaningsih, Sandro W. Lubis, Eddy Hermawan, Dita Fatria Andarini, Teguh Harjana, Dian Nur Ratri, Ainur Ridho, Risyanto, and Akas Pinaringan Sujalu
MDPI AG
Nusantara, Indonesia’s new capital city, experienced a rare extreme rainfall event on 27–28 August 2021. This heavy rainfall occurred in August, the driest month of the year based on the monthly climatology data, and caused severe flooding and landslides. To better understand the underlying mechanisms for such extreme precipitation events, we investigated the moisture sources and transport processes using the Lagrangian model HYSPLIT. Our findings revealed that moisture was mostly transported to Nusantara along three major routes: from Borneo Island (BRN, 53.73%), the Banda Sea and its surroundings (BSS, 32.03%), and Sulawesi Island (SUL, 9.05%). Overall, BRN and SUL were the main sources of terrestrial moisture, whereas the BSS was the main oceanic moisture source, having a lower contribution than its terrestrial counterpart. The terrestrial moisture transport from BRN was mainly driven by the large-scale high vortex flow, whereas the moisture transport from the SUL was driven by the circulation induced by boreal summer intraseasonal oscillation (BSISO) and low-frequency variability associated with La Niña. The near-surface oceanic moisture transport from BSS is primarily associated with prevailing winds due to the Australian monsoon system. These insights into moisture sources and pathways can potentially improve the accuracy of predictions of summer precipitation extremes in Indonesia’s new capital city, Nusantara, and benefit natural resource managers in the region.
A P Sujalu, H Syahfari, P Astuti, N Jannah, H Sutejo, and Jumani
IOP Publishing
This research evaluated forest microclimate effects on biodiversity, explore relationships among canopy properties, and disentangle their relationship on orchid ephypite diversity in the climax. The presence of orchids data collection carried by census on every tree that is over grown, while the research plots using single plot to the extent of 6 plots, each of the sized of 100 x100 m of lowland dipterocarp forest in Malinau Regency. Overall number of orchids were found in 6 hectares of climax forest could be 3324 clumps or 554 clumps/hectares from 43 species especially of the genus Bulbophyllum (7 genus or 35%). The analysis used a multiple linear regression, while Pearson’s correlation method. was used to find out the correlation between X (climate parameters) and Y (number of orchid) variables. Correlation between the elements of micro-climate with a number of orchids in climax shows a positif and strong correlation between the presence of orchids with average daily humidity (0.99) and the intensity of radiation at each vertical tree stratum (0.95), instead the relationship with temperature showed negative and a weak correlation (-0.51).
M Hidayanto, Y Fiana, M Amin, A P Sujalu, and Sumarmiyati
IOP Publishing
The productivity of swampland in North Kalimantan, is still low and can be improved through appropriate cultivation technology. The study aims to increase swampland productivity in Tanjung Buka, Tanjung Palas Tengah Sub-District, Bulungan Regency through new superior varieties of rice. The introduction of new superior varieties of swamp rice (inbrida swamp rice-Inpara), namely Inpara-2, 4, 8, Inpari-30, Inpari-32, and local variety as a comparison, with the legowo row planting system (Jarwo) 2:1. The fertilizer dosage was 50 kg NPK ha−1, 100 Urea kg ha−1 and 1,000 kg dolomite ha−1. Plant growth, yield components and economic data were observed and calculated. Plant growth and yield components parameter were analyzed with Analysis of Variant (ANOVA), and followed with the Duncan Multiple Range Test (DMRT). Break-even point value and the BCR ratio were calculated for economic analysis. The result showed that the highest rice productivity was Inpara-2 and Inpari-32, and the lowest productivity was local variety. The research results showed that Inpara-2, 4, 8, Inpari-30, and Inpari-32 with the legowo row planting system (Jarwo) 2:1 had BCR >1, whereas if using of local variety BCR <1. Therefore, the recommended varieties to developed in this study area are Inpari-32 and Inpara-2.
Muhamad Hidayanto, Yossita Fiana, Afiah Hayati, and S. Akas Pinaringan
IOP Publishing
RECENT SCHOLAR PUBLICATIONS
MOST CITED SCHOLAR PUBLICATIONS
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Associate Profesor at Agrotechnology Department-Agricultural Faculty, the University of 17 Agustus 1945 Samarinda (East Kalimantan, Indonesia). He received his Graduate in Geophysics and Meteorology in Bogor Agricultural University (1987), M.Agr. (2002) and Ph.D (2015) in Forest Science - Mulawarman University, respectively. From 1995 until 2011, he worked as Research Institute in the University of 17 Agustus 1945 Samarinda, East Kalimantan, Indonesia.
Already has 8 Copyright and > 120 published many different articles in news paper, scientific paper journals such as, agro-climate especially about Agrotechnology, climate changed and water management, forest science especially microclimate.