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All Journal Jurnal Hutan Tropika International Journal of Health, Economics, and Social Sciences (IJHESS)
Yetrie Ludang
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Public Health Social Sciences

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Model Pertumbuhan Polinomial Tanaman Sengon (Paraserianthes falcataria (L) Nielsen) di Lahan Rawa Gambut, Kalimantan Tengah: Polynomial Growth Model of Sengon Plant (Paraserianthes falcataria (L) Nielsen) in Peat Swamp, Central Kalimantan Wahyudi Wahyudi; Yetrie Ludang; Yaesar Wawan
HUTAN TROPIKA Vol 16 No 2 (2021): Volume 16 Nomor 2 Tahun 2021
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v16i2.3621

Abstract

Sengon (Paraserinthes falcataria (L) Nielsen) is a fast-growing plant that is widely cultivated by people in dry land. Currently, the cultivation of this plant is also mostly carried out on unflooded peat swamp land in Central Kalimantan. Utilization of peat swamp land has good prospects because this land is rich in organic matter as a source of plant nutrition. This study aims to determine the growth of sengon plants and create a plant growth model to predict the diameter and height of plants at a certain age. The research was conducted in Pulang Pisau Regency, Central Kalimantan Province. The model used to predict the growth of sengon plants is a polynomial equation. The results showed that the growth of sengon plants planted in unflooded peat swamp land at the ages of 6, 13, 30, 36, 48, and 56 months namely 3.76 cm; 7.07 cm; 12.94 cm; 13.91 cm; 18.76 cm; and 22.88 cm respectively for diameter (dbh); 4.64 m; 9.70 m; 11.45 m; 12.16 m; 14.75 m; and 15.20 m respectively for shoot height; and 2.37 m; 4.13 m; 4.85 m; 5.28 m; 5.62 m; and 6.21 m respectively for branch-free height. Sengon plant growth model with polynomial equations is y = -0.01802 + 0.739x - 0.0157x2 + 0.0002X3; y= 0.6002 + 0.893x - 0.0236x2 + 0.0002x3; and y = 0.5676 + 0.3777x - 0.0106x2 + 0.0001x3 for diameter (dbh), shoot height and branch-free height, respectively. The equation is valid and has high accuracy so that it can be used to predict diameter, shoot height and branch-free height of sengon plants until the age of 56 months.
Gender-Related Impact of Forest and Peatland Fires on Air Quality and Lung Function Analysis Tumpal Simatupang; Yetrie Ludang; Nawan; Bambang S. Lautt; Liswara Neneng
International Journal of Health, Economics, and Social Sciences (IJHESS) Vol. 6 No. 2: April 2024
Publisher : Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/ijhess.v6i2.1478

Abstract

he issue of air quality continues to be a major concern for both the environment and human health on a global scale, especially in developing nations. In 2015, Indonesia garnered international recognition as a result of the extensive forest and land fires. Exposure to PM particles in the air presents a substantial health hazard to individuals participating in their everyday routines. Research on the effects of forest fires on respiratory health in Central Kalimantan is still lacking. The Chest Miyagi multipurpose HI-801 spirometer, which was calibrated, was used to do lung function measurements. The participants were assessed while standing indoors in an environment with consistent air movement. Prior to the test, the individual's height and weight were measured and recorded in the spirometer, which then used this data to automatically determine the expected lung function. A sample size of 215 respondents who fulfilled the research criteria was selected for the study. The examinations took place in 7 urban and rural locations that were considered to be most susceptible to forest and land fires, based on the researcher's subjective judgment. These locations were chosen to meet the required sample size and were in close proximity to the fire sources. The spirometry device measures lung function, including forced vital capacity (FVC), forced expiratory volume in one second (FEV1), the ratio of FEV1 to FVC, and Forced Expiratory Flow (FEF). This study aimed to assess the effect of recurrent forest fires on lung function, specifically in relation to gender, in Palangka Raya City, Pulang Pisau Regency, and Kapuas Regency, located in the Central Kalimantan Province. The analysis was conducted using spirometry tests. There were no notable disparities in lung function among the respondents based on their gender.
Co-Authors Bambang S. Lautt Liswara Neneng Nawan Tumpal Simatupang Wahyudi Wahyudi Yaesar Wawan