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All Journal Jurnal Sains Teh dan Kina Journal of Applied Agricultural Science and Technology
Restu Wulansari
Research Institute for Tea and Cinchona
Agriculture, Biological Sciences & Forestry Computer Science & IT Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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Degradasi bahan organik di beberapa perkebunan teh di Jawa Barat Restu Wulansari; Eko Pranoto
Jurnal Penelitian Teh dan Kina Vol 21 No 2 (2018): Jurnal Penelitian Teh dan Kina
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v21i2.144

Abstract

The tea production and the quality were over the years, especially in West Java, Indonesia. This had been affected by several factors including the aged of tea plantations, declining soil fertility, and soil degradation among other factors. Andisol is the most suitable soil and dominant in Indonesia for tea plantation. The objectives of this study were to evaluate the impact of long-term tea cultivation on soil organic matter degradation in 6 years (2011 and 2017) in tea plantations in Bandung, Bogor, Cianjur and Garut, West Java. Data analysis used the independent sample t-test with SPSS 16.0 at a significant level of 95%. This study used a quantitative descriptive method by comparing the levels of organic matter and macronutrients from 89 samples taken in 2011 and 2017. Soil samples were taken at a depth of 35-40 cm with a distance of 25cm of the tea plant. Conclusion of the study, that the levels of organic matter in the regions of Bandung, Cianjur, and Garut are not significantly different between 2011 and 2017; while in the Bogor area the level of organic matter in 2011 was 5.41% and decreased in 2017 was 4.40% (a decrease of 18.72%). However, based on C-organic data in 2011 and 2017 nutrient degradation has occurred in all locations. Decreasing organic matter can cause a low decrease in soil fertility and productivity of tea crops. Provision of organic matter and proper fertilization must be done to maintain soil fertility and productivity of tea plants.
Kajian Monokultur dan Tumpangsari Tanaman Teh dengan Cabai di Beberapa Kemiringan Lereng terhadap Perubahan pH Tanah dan Ca-dd Restu Wulansari; Eko Pranoto
Jurnal Penelitian Teh dan Kina Vol 21 No 2 (2018): Jurnal Penelitian Teh dan Kina
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/pptk.jur.jptk.v21i2.148

Abstract

The utilization of tea area especially on young tea period to intercropping was one of the efforts to keep the income stability, especially on tea smallholder plantation scale. Chilli was one of the plants planted on the tea area by the intercropping system. But, chili has different habitat and characteristics than tea, especially on soil pH characteristics. The optimum pH to the growth of Chili on 6–7, otherwise tea on 4,5–5,6. Generally, chili needs dolomite around 3,66–6,83 tones per hectare if the difference of pH around 1,0–2,0. The research aimed to evaluate the soil pH and exchangeable-Ca (Ca-dd) on Monoculture and Intercropping tea with chili on the selected slope of the area. The experiment was conducted at the Experimental Garden of Research Institute for Tea and Cinchona, West Java, on the young tea area age two years. The Split Split Plot experimental design was used with three repetitions. As Main Plot was Planting System (Intercropping and Monoculture System); while the sample position (between plant and row of the plant) was as Sub Plot and Sub Sub Plot was Land Slope (8-15%, 16-25%, dan >25%). The result shows that the intercropping system tea with chili caused the Ca-dd and soil pH higher compared to that monoculture system. But, the land slope was not significantly influencing the Ca-dd and soil pH. The highest Ca-dd was on the row of the plant with Intercropping system on slope 16-25% treatment amount 8,82 m.e/100 g soil and it had a correlation also to the highest pH i.e 5,43. If the intercropping system still used chicken manure as a fertilizer, it will be caused by the tea plant was calcium poisoning.
Topsoil Thickness and Its Chemical Properties between Tea Plantation and Bare Land on Different Slopes Faris Nur Fauzi Athallah; Restu Wulansari
Journal of Applied Agricultural Science and Technology Vol. 9 No. 3 (2025): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v9i3.103

Abstract

Land degradation in Indonesia is often attributed to human activities and high rainfall. The existence of forest land clearing and conversion into non-agricultural land causes topsoil erosion and structural damage, reducing the capacity to hold water and nutrients. The phenomenon contributes to the degradation of tea (Camellia sinensis) plantation, showing the need to improve agricultural land by maintaining soil ecosystems. Therefore, this study aimed to compare soil from tea plantation with bare land on two different slopes based on the chemical quality at Gambung Tea Plantation, Research Institute for Tea and Cinchona. The selected land slope was gentle (0 - 8%) and steep (30 - 40%), producing four environmental combinations. Soil sampling was carried out in two different layers, at 0 - 20 cm and 20 - 40 cm. The experimental parameters observed were topsoil thickness, soil water content, pH, and soil nutrients. The results showed that in steep slope land conditions, tea cover crops maintained topsoil with a thickness of 15.01 cm compared to bare land. This corresponded to topsoil degradation of 19.6% compared to gently slope topographic conditions. In gently slope conditions, both types of land cover did not show significant differences. Tea plant cover maintained better soil water content and reduced soil N loss, although steep slopes showed lower soil nutrient content due to absorption.
Co-Authors Eko Pranoto Faris Nur Fauzi Athallah