Intercropping with peanuts and long-term application of organic wastes improve mycorrhizal development and growth of red rice under aerobic irrigation systems

Effect of additive intercropping with peanuts and long-term application of organic wastes on the development of arbuscular mycorrhizal and red rice growth under aerobic irrigation systems on raised beds has been studied through a field experiment conducted at Beleke Village, West Lombok, Indonesia, from October 2020 to February 2021. The experiment was designed using Split Plot, with three blocks and two treatment factors: intercropping with peanut (T1= monocropped rice, T2= rice-peanut intercropping) as main plots, and application of organic wastes (L0= no waste, L1= rice husk, L2= rice husk ash, L3= rice husk ash + cattle manure) as subplots. Data were analyzed with Analysis of Variance (ANOVA) and Tukey’s HSD at 5% levels of significance using CoStat for Windows ver. 6.303. The results indicated that intercropping with peanuts significantly increased plant height, tiller number, and growth rate of plant height by 25, 26, and 50%, respectively. Both intercropping with peanuts and application of organic wastes such as rice husk ash significantly increased mycorrhizal spore number (by 190 and 21%, respectively). Intercropping red rice with peanuts together with the application of rice husk ash resulted in the highest growth rates of tiller number (0.69 tillers/day) and leaf number (3.16 leaves/day) of red rice.