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Salwa Lubnan Dalimoenthe
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Effects of organic medium on growth and root formation of Cinchona ledgeriana Moens planting material at early stage of nursery Salwa Lubnan Dalimoenthe
Jurnal Penelitian Teh dan Kina Vol 17 No 2 (2014)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v17i2.47

Abstract

Cinchona plants commonly propagated through vegetative propagation using grafting between scion and rootstocks and planting on mixed of top soil and sub soil. To overcome these problems, an alternative planting medium of cinchona seedling has to be explored to re­duce the use of soil. In this research, various organic materials have been tested to see their effect on growth and root formation of cinchona seedling at early stage of cinchona nursery. The experiment was arranged in a randomized complete design (RCD) with 17 treatments, each treatment consists 20 plants/replication. Treatments tested were combination of organic matter (cocopith, rice husk, sawdust and peat soil) with top soil (15% and 25%). Cow dung or seaweed, as organic fertilizer was added to enrich planting medium. Results shows that co­copith, rice husk, sawdust and peat soil en­riched with cow dung or seaweed has no signi­ficance difference with top soil medium (con­ventional planting medium) on plants living percentage, plants height, leaves number and, stem diameter of cinchona seedlings at early stage of cinchona nursery comparing with the conventional way. On plants heights and leaves number, there are significant difference caused by the treatment during three months after plantings. The number of rooting plants in bet­ween 33% up to 100%. In general, plants re­generation and compatibility between scion and rootstock of cinchona tested plants shows that the cell regeneration or cell growths are well and there is no sign on incompatibility between scion and rootstock.
The effect of climate change on rainfall pattern and deficit of water in tea plantation Salwa Lubnan Dalimoenthe; Y Apriana; T June
Jurnal Penelitian Teh dan Kina Vol 19 No 2 (2016)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v19i2.104

Abstract

Climate change has been influencing rainfall pattern so that it would be necessary to see the impact of that changed on tea plantation. The experimental area coverage lowland (600 m asl), midland (800-1000m asl) and highland (>1.000 m asl) tea plantation and each altituted represented by three tea estate in West Java. The rainfall data collected since 2005 up to 2014 from each estate and water deficit has been count through the method develop by Wijaya (1996). The results showed that the rainfall pattern has been changed by La-Nina and El-Nino during 2005-2014 in tea estate either in lowland, midland or highland in the last decade. The climate change caused  rainfall decreasing and increasing on dry month (the rainfall < 100 mm). Eventhough on 2009 there is an significantly increasing of the rainfall but after 2009 until 2014, the rainfall tend to decrease. After El-Nino on late 2009 and early 2010, lowland tea estate on Subang Regency facing water deficit until 5 months with R (defisit water index) far below 1 even there is no El Nino. The tea plantation at midland area (Cianjur Regency) facing 5 months water deficit per year, but the R index close to 1. While in highland tea plantation (Bandung Regency), the water deficit only happend on certain month on certain year although there is a month with zero rainfall. Water deficit could be happend because of runoff on soil surface stimulate by low ability of soil to keep the water.
Co-Authors T June Y Apriana