Stand structure of Unmanaged Red Meranti Plantation (Shorea leprosula Miq.) in Haurbentes Forest Research, Jasinga

Abstract

Failure in degraded forest rehabilitation was caused by using selected species without sufficient attention on site characterictics. Species selection by looking at site limiting factor, will increase success in degraded forest rehabilitation. The objective of this reasearch was to study the influence of physical and chemical soil properties on growth of Shorea leprosula Miq, Shorea palembanica Miq, dan Shorea mecisopteryx. Data were analyzed using multiple linear regression analysis with mean annual increment (MAI) of height and diameter as dependent variable and soil properties as independent variable. The results showed that growth increment of S.palembanica was influnced by soil perperties with R 2 adjusted value for MAI-diameter and MAI-height repectively, 0.946 and 0.674 whereas others two Shorea have R 2 adjusted value < 0.5. The research also showed that available P content was the limiting factor of the three species. There was a difference of each species in respond to the available P content. MAI-height on S. mecisopteryx and MAI-diameter and MAI-height on S. pelambanica will increase in line with decreasing available P content while S. leprosula required P available increasing in order to increase of MAI-diameter. This indicates that each species have specific response on certain soil properties content.

Assesing Infiltration Rate and Soil Physical Properties at Different Vegetation Densities in the Jasinga Silviculture Teaching Industry (JSTI) Area

“…The research location is in the Jasinga Silviculture Teaching Industry (JSTI) area, Jasinga District, Bogor Regency, West Java. The area of JSTI is ±9.3 ha (6.1 ha densely vegetated and 3.2 ha sparsely vegetated) with an altitude of ±250 meters above sea level and an average rainfall of 4,267 mm/year [20]. JSTI areas have an undulating topography with a dominant slope of 26%-45%.…”

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“…Salah satu lokasi yang belum memiliki catatan JPE yang baik adalah Kawasan Hutan Penelitian Haurbentes yang terletak di Provinsi Jawa Barat (Nurhayat & Putra, 2022). Lokasi ini secara geografis berada pada ±250 meter di atas permukaan laut (dpl) dan memiliki curah hujan rata-rata 4267 mm/tahun (Pamoengkas & Erizilina, 2019)…”

Species composition and stand structure of Shorea stenoptera Burck in KHDTK Haurbentes, Bogor, West Java

“…Optimal growth is supported by suitable environmental conditions (microclimate), which increases its survival ability. Therefore, it is important to conduct research on the composition and structure of S. stenoptera stands and their biophysical effects (Pamoengkas and Erizilina 2019). This study aimed to analyze the composition of the species and the structure of the S. stenoptera Burck stand in the KHDTK Haurbentes, and to identify the biophysical aspects of the natural regeneration growth of S. stenoptera Burck in the KHDTK Haurbentes.…”