STUDY ON DYNAMICS OF NUTRITION AVAILABILITY IN SOIL OF BROWN RICE (Oryza sativa L. var. Aek Sibundong) CULTIVATION WITH ORGANIC SYSTEM OF RICE INTENSIFICATION (SRI) METHOD AND DRIP IRRIGATION SYSTEM IN POLYBAG

• Main Author: Derrian Fridaus (11413017), Kevin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22783
• Institution: Institut Teknologi Bandung

Brown rice as a functional food can not only fulfill calorie needs as staple food, but <br /> <br /> also gives health promoting effects. However, brown rice relatively costs more than <br /> <br /> the common white rice. Increase of production can lower this cost and improve <br /> <br /> customer buying power. Combination of organic system of rice intensification <br /> <br /> (SRI) and drip irrigation system have been proven able to increase rice production. <br /> <br /> Knowledge on nutrient dynamics (Nitrogen, Phosphorus, and Potassium) in <br /> <br /> growing medium is essential for a precision production capability. Goals of the <br /> <br /> research are the following: to determine the dynamics of total N, available & <br /> <br /> potential P, available & potential K, as well as organic C in different growing <br /> <br /> mediums at different growth stages of Aek Sibundong paddy variety. Determination <br /> <br /> of nutrient content in the plant is also carried out. Research is carried out with <br /> <br /> Randomized Block Design with different growing medium treatments, including <br /> <br /> T1K0P0: soil (control), T1K0P1: NPK fertilizer-added soil, T1K1P0: compost <br /> <br /> added soil (1:1 w/w), and T1K1P1: NPK fertilizer and compost (1:1 w/w)-added <br /> <br /> soil. Cultivation is carried out in polybags with organic SRI method and drip <br /> <br /> irrigation. Samples are obtained as composites for every treatment in the nutrient <br /> <br /> content tests (growing medium and plants). Results of soil tests are as follows (in <br /> <br /> order of days after planting: 0, 35, 80, 120 DAP): (a) total N of growing medium <br /> <br /> (in %), T1K0P0: 0,18, 0,15, 0,15, 0,14; T1K0P1: 0,18, 0,14, 0,15, 0,14; T1K1P0: <br /> <br /> 0,71, 0,59, 0,61, 0,54; T1K1P1: 0,71, 0,56, 0,67, 0,58; (b) available P of growing <br /> <br /> medium (in ppm), T1K0P0: 21,4, 42,7, 33,9, 36,1; T1K0P1: 21,4, 41,5, 44,1, 49,5; <br /> <br /> T1K1P0: 352,7, 283,9, 281,9, 168,3; T1K1P1: 352,7, 307,3, 416,6, 184,8; (c) <br /> <br /> available K of growing medium (in ppm), T1K0P0: 183,6, 343,3, 313,6, 318,2; <br /> <br /> T1K0P1: 183,6, 321,4, 280, 314; T1K1P0: 2768, 2071,4, 2205,5, 1750,7; T1K1P1: <br /> <br /> 2768, 2010,9, 2383,9, 1880,2; (d) organic C of growing medium (in %), T1K0P0: <br /> <br /> 1,79, 1,84, 1,78, 1,81; T1K0P1: 1,79, 1,78, 1,84, 1,72; T1K1P0: 8,97, 7,55, 7,64, <br /> <br /> 6,92, T1K1P1: 8,97, 7,47, 8,22, 7,98. Results showed absorption of nutrient on <br /> <br /> compost-added soil (T1K1P0) is almost the same with compost & NPK-added soil <br /> <br /> (T1K1P1), which indicates that more nutrient availability does not give better <br /> <br /> absorption and productivity.