Influences of farming practices on soil properties and the 2-Acetyl-1-pyrroline content of Khao Dawk Mali 105 rice grains

Chinachanta Kawiporn, Herrmann Laetitia, Lesueur Didier, Jongkaewwattana Sakda, Santasup Choochad, Shutsrirung Arawan. 2020. Influences of farming practices on soil properties and the 2-Acetyl-1-pyrroline content of Khao Dawk Mali 105 rice grains. Applied and Environmental Soil Science, 2020:8818922, 14 p.

https://doi.org/10.1155/2020/8818922

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Résumé : Khao Dawk Mali 105 (KDML105) is a premium fragrant rice variety and is widely grown in Thung Kula Rong Hai (TKR), northeast Thailand. In the present study, the influence of organic and conventional rice farming (ORF and CRF, respectively) in TKR farmers' paddy fields on soil properties and their relationship with 2-acetyl-1-pyrroline (2AP) in KDML105 rice grains were investigated. The results indicated that the ORF system had a strong positive effect on major soil quality indicators and the 2AP content in the rice grains. The soil organic matter (SOM) was approximately twice as much in the ORF than in the CRF system, thus leading to much higher total nitrogen (TN), humic acid (HA), and microbial populations in the ORF system. The higher SOM in the ORF system not only enhanced the soil quality indicators but also contributed to approximately 3.5 times higher 2AP than in the CRF system. Principle component analysis indicated a close correlation among SOM, TN, HA, and microbial population under the ORF system; these variables exhibited strong correlations with the 2AP contents in KDML105 rice grains.

Mots-clés Agrovoc : Oryza sativa, système d'exploitation agricole, pratique culturale, microbiologie, biologie du sol, caractéristiques du sol, matière organique du sol, riz

Mots-clés libres : Rice, Farming system, Soil microbial communities, Soil properties

Classification Agris : F07 - Façons culturales
P34 - Biologie du sol
Q04 - Composition des produits alimentaires

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

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