25/07/2024
This project is an agrivoltaic project supported by KOICA, where the PMC team is currently operating a farm under APV The farm is managed under the guidance of Professor Soo Min Kim (Dankook University, Horticulture Major), and various crops are being cultivated and tested to find suitable crops for the environment of Ovalau and under the APV
Through this project, the PMC team shares the following regarding the environment of Ovalau and the types and growth of crops under the APV
Through this project, the PMC team shares the following regarding the environment of Ovalau and the types and growth of crops under the APV
Fiji has a warm tropical climate, with a maximum temperature range of 25 to 31 degrees Celsius. Due to the high temperature, the evaporation rate (a process speed for water exchange between soil and atmosphere) is relatively high. Thus, some water-intensive vegetable crops such as cabbage, growing vegetables are very challenging to grow in open-filed in FIJI. Moreover, both strong sunlight and higher temperature can damage the leafy vegetables by reducing photosynthesis efficiency or increasing water stress. Most vegetables have C3 photosynthetic pathway, which means that they are not good at high temperatures. In addition, FIJI has frequent rainy days, which causes heavy water and soil erosions in open-field farmlands. A good shading system in Fiji farmlands may play an important role in sustainable vegetable production in FIJI.
Agrophotovoltaic (APV) systems have increasingly gained attention from many scientists and policymakers. In Island countries where land areas are limited, the APV system that integrates solar energy and agricultural activity can increase land use efficiency in the Island. In addition, solar panels in APV provide shade that can prevent strong sunlight and heavy rainfall during the vegetable growing season. There is an on-going project called “Fiji Agrophotovoltaic Project in Ovalau”. The overall goal of this project is to install 4MWp APV in nationwide FIJI. This project consists of two main parts: solar energy and agriculture. The main goal of the agricultural sector is to develop efficient APV cropping management. Korea International Cooperation Agency (KOICA) - The PMC team has started a pilot project to test crop growth eligibility under 200kw APV installed on Ovalau, FIJI in 2023. Agriculture machinery tools (e.g. hand walking tractor, auto-sprayer, etc.) have been introduced to farmers to do the farming activities for this project. Various vegetables, fruit, and root crops such as chili, tomato, cabbage, dalo, etc. have been planted in the APV system. Since the solar panels provided a negative shading effect for the plant growth in the APV system, it is very important to identify crops that can provide good yields. Based on the first trial crop test from the project, among the test crops, root crops (e.g. dalo) and fruit crops (e.g. eggplants) were doing well in the APV system. However, further studies on designing cropping management plans suited for APV systems are still needed to increase crop growth rates and maximize their yields. Through multiple field trials consisting of different combinations of crop types and management plans, the KOICA-PMC team has planned to provide an APV cropping model for FIJI Island.