Comparison of Rice (Oryza sativa L. var. INPARI 30 Ciherang Sub 1) Growth and Biomass Production using Recirculated Irrigation System on Beach Sand and Cocopeat with Beach Sand and Biochar as Growing Media

• Main Author: Eka Pratiwi (11413023), Deyra
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26566
• Institution: Institut Teknologi Bandung

The demand for rice as one of the main commodities in Indonesia increases every <br /> <br /> year. On the other hand, the amount of rice field continuously decrease. An <br /> <br /> alternative is needed to fulfill the market demand. The aim of this research is to <br /> <br /> compare the effect of beach sand combined with biochar addition and beach sand <br /> <br /> combined with cocopeat as growing media using recirculated irrigation system on <br /> <br /> rice plant growth and biomass production. This research was conducted <br /> <br /> experimentally using 4 treatments with 6 plants for each treatment. The first <br /> <br /> treatment (P1) used beach sand, compost and biochar with 2:2:1 ratio, P2 used <br /> <br /> beach sand, compost and biochar with 1:2:2 ratio, P3 used beach sand, compost and <br /> <br /> cocopeat with 2:2:1 ratio and P4 used beach sand, compost, and cocopeat with 1:2:2 <br /> <br /> ratio as the growing medium, respectively. The plants were irrigated daily using the <br /> <br /> amount of water equal to 50% field capacity of each growing medium. Excess water <br /> <br /> from the previous day and tap water were used to fulfill the water requirement of <br /> <br /> the following day. The amount of water used for plant irrigation daily are 1.580 <br /> <br /> ml/day, 1.200 ml/day, 1.475 ml/day and 1.195 ml/day for P1, P2, P3 and P4 <br /> <br /> respectively. Variables observed in this research were air temperature, air humidity, <br /> <br /> wind velocity, light intensity, growing medium temperature, growing medium pH, <br /> <br /> growing medium humidity, plant age, plant height, number of leaves, number of <br /> <br /> tillers, number of productive tillers, plant biomass, plant productivity, <br /> <br /> evapotranspiration, and water holding capacity of the growing medium. The <br /> <br /> nitrogen and silica contents of growing medium, excess water and plant biomass <br /> <br /> were also determined. Based on plant growth variables observed such as plant <br /> <br /> height, number of leaves, number of tillers, number of productive tillers, P1 and P2 <br /> <br /> produced better growth results compared to P3 and P4. On the other hand, based on <br /> <br /> productivity parameter P4(beach sand, compost and cocopeat with 1:2:2 ratio) <br /> <br /> yields the highest result, amounting to 2,6 ton/ha while P2 only yields 2,6 ton/ha. <br /> <br /> The low productivity of P2 were caused by pathogen attack on cultivation.