Organic Farming Model in The System of Rice Intensification (SRI) For Reducing Iron Toxic1ty and Increasing Rice Production in A Fresh Oxisol Rice Field

Cahyani, Vita Ratri and , Purwanto and Purba, Sofia Mianti (2010) Organic Farming Model in The System of Rice Intensification (SRI) For Reducing Iron Toxic1ty and Increasing Rice Production in A Fresh Oxisol Rice Field. IbM.

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    Abstract

    Biomass production of rice and N uptake are greater in plants grown under flooded conditions than in plants grown under non-flooded (upland) conditions. However, in new (fresh) rice field area of acid mineral soils, such as Oxisols, flooding the fields result in reducing ferric-ion to ferro-ion to the threshold toxicity level. The present research was aimed at reducing iron (Fe) toxicity and increasing rice production in a fresh Oxisol rice field by cultivating rice using system of rice intensification (SRI) method in combination with an organic farming model of applying organic fertilizers and biofertilizers. The results indicated that intermittent irrigation with alternate wetting (1-2 cm depth) and drying intervals in the SRI method minimized effectively Fe toxicity, organic fertilizer eliminated effectively both Fe and acid toxicity of Oxisols. The inoculation of a set of biofertilizers of Arbuscular Mycorrhiza (AM), phosphate solubilizing bacteria (PSB), and N2-fixing bacteria (NFB) of Azotobacter, Azospirillum, and Rhizobium contributed effectively in combination with organic fertilizer, especially with rice straw compost for increasing nutrient availability and nutrient uptake especially N and P in an Oxisol Tuntang. The application of Mn and Fe-oxidizing bacteria gave an adverse effect for the rice growth.

    Item Type: Article
    Subjects: Q Science > QK Botany
    S Agriculture > S Agriculture (General)
    Divisions: Lembaga Penelitian dan Pengabdian Kepada Masyarakat - LPPM
    Depositing User: Lia Primadani
    Date Deposited: 15 Apr 2014 01:10
    Last Modified: 15 Apr 2014 01:10
    URI: https://eprints.uns.ac.id/id/eprint/11023

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