PENINGKATAN PERTUMBUHAN TANAMAN PADI PADA TANAH SALIN-SODIK MELALUI APLIKASI AMENDEMEN GIPSUM DAN AMENDEMEN BIOCHAR SEKAM PADI-KOTORAN SAPI SERTA BIOPRIMING BENIH DENGAN BACILLUS SUBTILIS DAN AZOTOBACTER CHROOCOCCUM

• Main Author: Fanny Rahmah, Dita
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68258
• Institution: Institut Teknologi Bandung

Rice is a staple food that is generally consumed by people in Asia, especially in Indonesia, with the highest level of rice consumption reaching 97.6 kilograms per capita. Based on data from the Central Statistics Agency (2020), the rice harvested area in 2020 only reached 10.66 million hectares. This figure has decreased from 0.19% in 2019 due to the conversion of paddy fields to non-rice fields. One solution to overcome this problem is the use of non-productive land by reclaiming saline-sodic land into agricultural land. Efforts to improve salinity-stressed land include the addition of amendments, leaching and seed biopriming. The inorganic amendments commonly used are gypsum and organic amendments of rice husk and cow dung biochar. This study was conducted to determine the effect of variations in the addition of gypsum (100%; 80%; 40%; 20%; 10%) of the stochiometric requirements, organic amendments to a mixture of cow dung and rice husks (1:1 and 2.5% of soil weight). and seed biopriming using PGPR Bacillus subtilis and Azotobacter chroococcum on saline-sodic soil characteristics, rice plant growth and rice plant productivity. The experiment was started by watering the paddy fields using a 3.5% percent saline solution, to produce saline-sodic conditions. Then followed by the treatment of amendments. The effect of the addition of amendment treatment on the salt stripping process was observed in the leaching process using water for 40 days. It was found that the physical and chemical characteristics of the soil with 100% gypsum variation and variations of organic amendments could give good results in reducing salt levels in the soil through EC, CEC, SAR and ESP analysis and achieve soil characteristics suitable for rice cultivation, namely EC < 2 dS/ m, ESP < 15% and pH 5 - 7. In addition, there is a biopriming method by inoculation of PGPR such as Bacillus subtilis (BS) and Azotobacter chroococcum (AC) on seeds to optimize rice growth in salt land. In growth analysis, it was found that the G100 variation resulted in good growth in terms of height, number of leaves, number of tillers and chlorophyll value. Then followed by variations of organic amendments and PGPR. This is supported by improvements in soil structure and interactions of micro and macronutrients that are essential for growth. In rice yields, the best results were obtained in the PGPR variation (P) with dry grain yields of 3.87 grams/plant which was equivalent to 0.309 kg/m² and dry biomass of 55.89 grams/plant which was equivalent to 4.47 kg/m²