Soil Potassium Nutrient, Temperature and Rainfall Required to Generate ‘Honey Taste’ of Cilembu Sweet Potato

Abstract

<p>Indonesia produces normal and “honey taste sweet potatoes” (HTSP), but soil properties and climate factors that govern the unique honey taste and its sugar content have not yet comprehensively evaluated. The objective of the study was to assess and evaluate the soil nutrients and climate factors generating honey taste of Cilembu Rancing cultivar. Soils and plant tissues were sampled at different elevations for various macro- and micro-nutrient analyses and that tubers for sugar analysis. Results showed that the most suitable climate to produce the highest vine and tuber weight, and total tuber sugar of the HTSP was monthly temperature of 21–22oC occurring at 870–917 m soil elevation with monthly rainfall of 96-199 mm. The K nutrient was responsible in part to the high production and total sugar as revealed by significantly positive correlation between soil available K against K content of leaves and tubers, fresh weight of vines and tubers, and total sugar of tubers. The honey taste was driven by type of dominant sugar: fructose > sucrose > glucose. The balance of N, P, K, Ca and Mg to support generation of HTSP for Rancing cultivar was 2,067, 25, 304, 1,824 and 260 mg kg-1 soil, respectively. Further, the content of Fe, Mn, Cu and Zn micronutrient was 29, 177, 4 and 2 mg kg-1, respectively. Findings of climate factors and soil nutrients required by HTSP in this study could be used as a guidance to select the new areas for massive development of honey-taste sweet potato.</p>

Selection for representative environment to identify high yielding and sweetness levels of sweet potato (Ipomoea batatas L.) in Indonesia

“…This has been reported by several researchers, where genetics significantly contribute to variations in sweet potato yields in different growing environments (Andrade et al 2016;Maulana et al 2022). In other studies, sweetness levels in sweet potatoes also showed significant differences in different locations (Anda et al 2018;Solihin et al 2018). This shows that the environment in which plants grow can affect the quality and chemical composition of the plants.…”

“…This is because both environments have relatively high potassium (K) content (Sumedang dry field = 1.22 cmol kg -1 and Bandung dry field = 0.89 cmol kg -1 ). K content in the soil can affect the increase in sweetness levels in sweet potatoes (Anda et al 2018). The nutrient content in the Sumedang paddy field environment was relatively high, therefore it was only suitable for certain types or genotypes.…”

The Relationship between Differences of Slope Class with Soil Chemical Characteristics in Jolotigo Tea Plantation Scope of PTPN IX

“…Tidak ditemukannya korelasi nyata pada kelerengan dan C-organik pada tanah diperkirakan juga disebabkan oleh faktor lainya seperti vegetasi, maupun faktor manusia berupa penggunaan lahan secara intensif (Rahmayanti et al, 2018). Menurut Anda et al (2018), kandungan Corganik pada tanah tidak bergantung pada perbedaan ketinggian tempat dan cenderung lebih tinggi pada daerah yang permukaannya lebih datar.…”

Land Capability and Suitability Assessment for Sweet Potato (ipomoea batatas l.) in Cimanggung Sub District, Citarik Sub watershed, West Java

“…Cilembu sweet potato is a sweet potato that specific in Cilembu village, the adjacent area to Cimanggung Sub District. It has a special sweet honey taste (Anda et al, 2018), and the sweetness quality fulfill the requirements of export standard (Agustina and Erwina, 2016). This sweet potato supplies market in several countries like Japan, Singapore, South Korea (Hoeridah and Sarianti, 2011).…”