Abstract
A research on the grafting of potato and black nightshade plants can be a new interesting
report. This research was carried out in the greenhouse of Horticultural Seed Center
Station in Pakem, Yogyakarta, Indonesia at an altitude of 780 m above sea level. In this
research, a potato plant was used as the rootstock while a black nightshade plant was
used as the scion. This research was conducted to examine the effect of grafting on
tuber formation and endophyte dynamic of potato-black nightshade grafted with an
application of liquid fertilizer made from goat manure. The plants consisted of three
levels: potato plants, grafted plants, and black nightshade plants. Liquid fertilizer
application consisted of two levels: without liquid fertilizer application, and with liquid
fertilizer application. The liquid fertilizer was applied once a week in the range
concentration of 1900-2000 µSCm-1 with total volume 0.5 liter per plants. Tuber
formation was affected not only by the grafting of the plants but also by liquid fertilizer
application. Potato with liquid fertilizer application produced the highest weight of
tubers. There were about 66 % of grafted plants that produced tubers with sprouts,
around 21.5% that produced irregular tubers and 12.5 % that produced regular tubers.
Application of liquid fertilizer resulted a larger total bacteria in potato plants, in black
nightshade plants, as well as in grafted plants. A population of bacteria in grafted plants
was accumulated more in the connected stem, whereas the total of bacteria in the lower
connected stem (rootstock) was larger than that in the upper connected stem (scion).
Yacobus Sunaryo, Djoko Purnomo, Maria Theresia, Vita Ratri. (2019) Tuber formation and endophyte dynamic in potato black nightshade grafting with application of goat manure liquid fertilizer, Asian Journal of Agriculture and Biology, Volume 7, Issue 2.
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