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Journal : Jurnal Wana Tropika

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ANALISIS NERACA AIR SECARA METEOROLOGIS DI DAS KEDUANG, JAWA TENGAH Kumalajati, Erlynda; Sabarnudin, Sambas; Budiadi; Sudira, Putu
Jurnal Wana Tropika Vol 5 No 1 (2015)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Abstract

Study on meteorological water balance in Keduang watershed, Central Java, aimed to find a balance between the need and meteorological availability of water in the Keduang watershed. Water demand is calculated by using the standard water requirements for this type of irrigation and non-irrigation needs. Types of non-irrigation water requirements include the need for water for domestic, office buildings, health facilities, lodging / hotels, educational facilities, religious facilities, industries, and markets, as well as livestock. Standards need water used is ISO 19-6728.1-2002 and Planning Criteria DGHS Department of Public Works in 1996. The availability of water is calculated using the water balance approach meteorological Turc-Langbein. The data used is the data in 2013 and analyzed using quantitative description.The results showed that 1) the need for water in the Keduang watershed 81,063,567.42 m3 / year, while 2) the availability of water in the meteorological amounted 280,160,992.62 m3 / year so that the difference amounted to 199,097,425.19 water m3 / year. From the results of these calculations, we can conclude that the water availability in the Keduang watershed is sufficient for fullfilling the water requirements. Keywords : Water requirements, water availability, water balance, Keduang watershed
KARAKTERISTIK AGROEKOLOGI DAN POTENSI TANAMAN GARUT PADA BERBAGAI VARIASI KETINGGIAN DI KABUPATEN GARUT, JAWA BARAT Rohandi, Asep; Budiadi; Hardiwinoto, Suryo; Harmayani, Eni
Jurnal Wana Tropika Vol 6 No 1 (2016)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Arrowroot (Maranta arundinacea L.) is a multipurpose plant that can grow under the stands so that the species has the potential to develop in the pattern of agroforestry. Initial information of arrowroot plant population as a source of germplasm for plant material/superior varieties and their agroecological characteristics in the field is indispensable. The study aims to determine the distribution, agroecological characteristics and potency of arrowroot in Garut regency. The methods include: (1) the study of literature and direct communication with stakeholders and the public, (2) field survey to collect data on distribution, cultivation status, abundance and productivity of arrowroot plant using a single plot, and (3) data collection of arrowroot agroecological characteristics include: vegetation analysis and geoklimat factors. The research results indicate that the arrowroot populations distribute in groups with a fairly broad ecological range i.e. altitude 6-1351 masl, temperature 20-36o C, relative humidity RH 40-72%, light intensity 12-56% dan pH 4.16-7,40 (acid to neutral) and in the low to high soil fertility condition. Falcataria moluccana as the major private forest species dominates in all zones of altitude, especially on the stage of the tree. Arrowroot abundance by elevation zones is 63,750 plants/ha (lowlands), 43,864 plants/ha (plains) and 73.333 plants/ha (plateau). The potential production for all elevations ranged from 15.40 to 163.2 g/plants. Cikajang and Cilawu populations have good potential to produce the high yield of tuber for arrowroot cultivation in Garut District. Keywords : Maranta arundinacea, Agroecological characteristics, Elevation, Potency, Garut District
SERAPAN KARBON PADA SISTEM AGROFORESTRY BERBASIS GAHARU (Gyrinops versteegii) DI SRAGEN DAN KARANGANYAR, JAWA TENGAH Rawana; Hardiwinoto, Suryo; Budiadi; Rahayu, Sri
Jurnal Wana Tropika Vol 11 No 2 (2021): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v11i2.178

Abstract

Agroforestry, the practice of growing trees and crops in interacting combinations, has a pivotal role to reduce the CO2 concentration in the atmosphere, and it subsequently sequesters the carbon in part of stems, branches, roots, and crowns of the trees composing their vegetation communities. The objective of the research is to know the carbon sequestration in the three agroforestry practices; those are multilayer tree garden, taungya, and home garden. The research was carried out from April 2017 to March 2018 at Sragen and Karanganyar regency central Java Province. Plot method, with the plot size of 20m x20m for trees, 10m x10 m for pole, and 5m x5m for sapling, was used in the sampling. The carbon sequestration was measured by Chave's allometric equation. The carbon sequestration of above ground the trees planted at taungya was 265.18 kg C ha-1 y-1, in home garden was 236.29 kg C ha-1 y-1, and in multi layer tree garden was 290.14 kg C ha-1 y-1. Seasonal fluctuation of the higest carbon sequestration in home garden occurs on October-December; in multilayer tree garden occurs on January-March; and in taungya occurs on July-September. Key words: Agroforestry practices, G.versteegii, seasonal fluctuation, Carbon sequestration
Co-Authors Alpian Asep Rohandi Eni Harmayani Johanes Pramana Gentur Sutapa Kumalajati, Erlynda Muhammad Andry Putu Sudira Rawana Rizqi Muhammad Mahbub Sabarnudin, Sambas SRI RAHAYU Suryo Hardiwinoto Tiberius Agus Prayitno