The diameter increment of selected tree species in a secondary tropical forest in Sarawak, Malaysia

Abstract

Abstract. Iskandar J, Iskandar BS, Partasasmita R. 2017. Introduction of Paraserianthes falcataria in the traditional agroforestry 'huma' in Karangwangi Village, Cianjur, West Java,. This paper discusses the result of study on introduction of 'jengjen' (Sundanese name) (Paraserianthes falcataria (L.) Nielsen in development of traditional agroforestry, 'huma' in Village of Karangwangi, Sub-district of Cidaun, District of Cianjur, Province of West Java, Indonesia. Method used in this study was qualitative with ethnoecological and biological approach. Observation and deep interview with informants were used to collect data. The result of study shows that although the population of Karangwangi Village has increased, the forest decreased, and intensively penetrated market economy, the huma system has continually practiced by village people. Unlike in the past, nowadays, the huma has been practiced in the non-forest instead of the forest. The huma system has been modified by people to be more permanent of traditional agroforestry system, such as bamboo garden (kebon awi), mixed of wood trees (kebon kai), and mixed fruit and wood trees (talun). In addition, due to more intensive in cultivation of agricultural land, Karangwangi people have adopted and cultivated jengjen plant in the huma farming system that had initially introduced by the Forestry Office (Dinas Kehutanan) through the regreening program. Moreover, the jengjen plant has been adopted and cultivated by the village people, such as integrated in the development of traditional agroforestry huma. It is caused this plant has provided some benefits, such as to improve soil fertility and to provide economic benefits, and does not eliminate the swidden farming (huma) system tradition of the people.

Recognizing indigenous knowledge of the Karangwangi Rural Landscape in South Cianjur, Indonesia for sustainable land management

“…Karangwangi Village is bordered by to the north by Cimaragang Village to the west by Cidamar and Kertajadi Villages, to the east by and to the south by the Indian Ocean. In 2015, the population in Karangwangi Village has recorded 5,587 inhabitants consisting of 1,817 families (Partasasmita 2015;Partasasmita et al 2017) (Figure 1).…”

The growth and rooting dimensions of the Local and Solomon Albizia in the agroforestry system

“…Legumes are well known to have the ability binding atmospheric nitrogen (Biswas and Gresshoff 2014). Its ability can help improve soil fertility (Iskandar et al 2017). Among those of Legume family, albizia is one of the species that already known well within communities.…”

“…Along with the economic value of the albizia timber, the leaves can also be used for animal feed. In Sukabumi, West Java, albizia can be planted in several agroecosystem types such as yards, fields/huma, tegal, and kebon kai (Iskandar et al 2017).…”

Vegetation dynamics of permanent plot in dipterocarp forest Bukit Bangkirai, East Kalimantan, Indonesia

“…In this permanent plot, data on each tree's annual change in diameter form a pattern where, under optimal growth conditions, it only occurs in the diameter class range of 5-10 cm. This is due to several factors; level of soil fertility, climatic factors, and the response of plants to external factors [25]. Judging from several areas in this permanent plot, several points with open vegetation allow young trees to grow prolifically so that these conditions lead to optimal growth, with the most significant diameter change being in the diameter class ≤ 10 cm for each tree species found.…”