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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Forestry Research
Winarni, Nurul L.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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Preliminary Results of Relationship between Oil Palm Harvest Losses and Harvest Interval in Riau and West Kalimantan, Indonesia Nurfalah, Lisa; Dwiyahreni, Asri A.; Winarni, Nurul L.; Mizuno, Kosuke; Grassini, Patricio
Jurnal Penelitian Pendidikan IPA Vol 9 No 12 (2023): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i12.6120

Abstract

Oil palm smallholders, in particular non-plasma independent smallholders, experience significant yield gaps. Closing this yield gap is important to enhance sustainable livelihoods for oil palm smallholders and reduce the risk of yield increase through expansion. One of the key factors influencing yield is the harvest interval (number of days between two harvesting rounds). Although standards for Good Agricultural Practices regarding oil palm prescribe a harvest interval of 7-10 days, independent smallholders often maintain a harvest interval of 12-30 days. A longer harvesting interval not only reduces the number of fresh fruit bunch harvested per hectare per month but also leads to a larger harvest loss from overripe fruits falling to the ground, deteriorating quickly (harvest loss). We followed an interdisciplinary research approach, combining insights from agronomy and anthropology, to better understand farmers’ practices, and drivers and challenges underlying decision-making. The approach consisted of field audits, farmer surveys, and qualitative interviews to explore which factors impact harvest interval. The harvest interval of smallholders in Riau and West Kalimantan ranged from 11 to 30 days. Farmers followed long harvest intervals (>16-d) due to the low fresh fruit bunch yield. However, longer harvest intervals increased potential harvest losses.
PHENOLOGY, CLIMATE, AND ADAPTATION: HOW DOES DIPTEROCARPS RESPOND TO CLIMATE? Winarni, Nurul L.; Kurniasari, Dewi R.; Hartiningtias, Diny; Nusalawo, Meyner; Sakuntaladewi, Niken
Indonesian Journal of Forestry Research Vol. 3 No. 2 (2016): Indonesian Journal of Forestry Research
Publisher : Association of Indonesian Forestry and Environment Researchers and Technicians

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/ijfr.2016.3.2.129-141

Abstract

Temperature, rainfall and extreme weather have been indicated to affect the phenological patterns and forest productivity by shifting flowering and fruiting seasons and patterns, as well as crop production. Dipterocarpaceae are high value trees for both timber and non-timber forest products. This study aims to determine the response of phenological patterns of flowering and fruiting of Dipterocarps to climate variables. The study was conducted at Way Canguk Research Station of the Bukit Barisan Selatan National Park (BBSNP), Lampung during May-November 2012 by analyzing 14 years (1998-2012) of phenological data of Dipterocarps. The phenology surveys were carried out on monthly basis by estimating the percentage of flowering, fruiting (divided into 0-4 scoring) and the crop production. The results indicated that the phenological patterns of Dipterocarps in the area depicted major and minor patterns without mass-flowering time, different from what have been reported for Kalimantan or North Sumatra. Minor peak flowering season showed regular flowering, particularly during March to July every year. However, there were major flowering seasons in November 2002 (20.2%), September 2006 (21%), and October-November 2011 (20.3%). Average monthly fruit production showed a peak at the end of the dry season. Major flowering season seemed to coincide with the period of major El Nino events in November 2002 and September 2006, while others associated with La Nina. This study suggest that phenology and climate change may have implications in designing strategies for collection of seed materials to support the conservation and plantation programs of the Dipterocarps.
Co-Authors Dwiyahreni, Asri A. Grassini, Patricio Hartiningtias, Diny KOSUKE MIZUNO, KOSUKE Kurniasari, Dewi R. Niken Sakuntaladewi, Niken Nurfalah, Lisa Nusalawo, Meyner