Student Research Reports
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Types of fertilizers that affect the growth of sea grape
Organization(s):Princess Chulabhorn Science High School Trang
Country:Thailand
Student(s):Siwatchaya Kunnui and Waruntorn Kruajun
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Educator(s):Patchara Pongmanawut
Contributors:Assoc. Prof. Dr. Mullica Jaroensutasinee and Assoc. Prof. Dr. Krisanadej Jaroensutasinee from Walailak University
Dr. Anantanit Chumsri from Rajamangala University of Technology Srivijaya Trang campus
The Institute for the Promotion of Teaching Science and Technology (IPST)
Report Type(s):International Virtual Science Symposium Report, Standard Research Report
Protocols:Dissolved Oxygen, pH, Salinity, Water Temperature
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Language(s):English
Date Submitted:03/06/2024
This research aims to study types of fertilizers that affect the growth of sea grape
(Caulerpa lentillifera) and the sea grape culture water quality. By experimenting with growing sea grapes in a greenhouse, divided into 6 experimental sets, with sets 1–5 using different fertilizers, including fertilizer formula 16-20-0, bat guano, urea, bio-extract, and cytokinin hormone, respectively. Experimental set 6, without fertilizer, was used as a control set. Cultured in a system with controlled light intensity. Collect water quality data every day, measure the growth of sea grapes, and change the used water every 7 days for 4 weeks. The results of the study found that sea grapes grow differently with different types of fertilizers. And the heaviest weight of sea grape was urea fertilizer. The length of sea grape grown in fertilizer formula 16-20-0 was the greatest. The length of sea grapes growing in cytokinin hormone is less than that in the control set. The sea grape length of using urea fertilizer was more than using bio-extract fertilizer, and the length of sea grapes using urea fertilizer was greater than that using bio-extract fertilizer. In addition, the sea grape using bio-extract fertilizer has noticeable external characteristics, which are tight ramulus arranged closely together, plump, beautiful, and large inflorescences with a darker green color than the other experimental sets. Sea grapes using bio-extract fertilizer were of great weight, with short and tight inflorescence, and popular among consumers. As for the water quality, it was showing no significant statistical difference.