Provincial Agriculture and Forestry Office
Provincial Agriculture and Forestry Office
SAMSON B.K.,c National Agriculture and Forestry Research Institute |
VORADETH S.,Agricultural Research Center |
ZHANG S.,Yunnan University |
TAO D.,Yunnan Academy of Agricultural Sciences |
And 11 more authors.
Experimental Agriculture | Year: 2017
Genotype by environment (G x E) interactions for grain yield were investigated in 13 perennial rice (Oryza sativa L./Oryza longistaminata) derivatives over three sites and 2 years in Lao PDR. Genotype accounted for 29.0% of the total sum of squares, with environment and the G x E interaction responsible for 60.2 and 10.8%, respectively. Cluster analysis identified three environment and six genotype groups, which accounted for 49.7, 98.0 and 42.8% of the E, G and G x E sums of squares, respectively. Principal component axes 1, 2 and 3 accounted for 54.0, 30.6 and 11.7% of the G x E sum of squares, respectively, with PCA1 indicating yield potential, PCA2 timing of cessation of rainfall in the 2011 wet season, and PCA3 environmental stresses affecting regrowth in the 2012 wet season. Genotype groups differed in adaptation to these contrasting conditions. G6 (Line 213, 240 and RD23) was widely adapted to all environments, with G5 (Line 248) being especially adapted to the 2012 environments. G3 and G4 were neutral, though G3 (Line 53) showed some preference for the Na Pok environments. G1 and G2 were poorly adapted everywhere, with the tall and late G1 (Line 11) being especially poor at Na Pok 2011 in a dry finish. While yields were lower in 2012, all derivatives survived the dry season with access to life-saving irrigation. This is promising, as the annual rice RD23 was unable to ratoon under these conditions, and had to be re-sown. Importantly, Line 213, 240 and 248 yielded comparably to RD23 from regrowth in 2012. Development of perennial rice should target rainfed and especially upland environments. Copyright © Cambridge University Press 2017 This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Husson O.,CIRAD - Agricultural Research for Development |
Tran Quoc H.,CIRAD |
Boulakia S.,CIRAD - Agricultural Research for Development |
Chabanne A.,CIRAD - Agricultural Research for Development |
And 14 more authors.
Renewable Agriculture and Food Systems | Year: 2015
Rapid changes in agricultural systems call for profound changes in agricultural research and extension practices. The Diagnosis, Design, Assessment, Training and Extension (DATE) approach was developed and applied to co-design Conservation Agriculture-based cropping systems in contrasted situations. DATE is a multi-scale, multi-stakeholder participatory approach that integrates scientific and local knowledge. It emerged in response to questions raised by and issues encountered in the design of innovative systems. A key feature of this approach is the high input of innovative systems which are often although not exclusively based on conservation agricultural practices. Prototyping of innovative cropping systems (ICSs) largely relies on a conceptual model of soil–plant–macrofauna–microorganism system functioning. By comparing the implementation of the DATE approach and conservation agriculture-based cropping systems in Madagascar, Lao PDR, and Cambodia, we show that: (i) the DATE approach is flexible enough to be adapted to local conditions; (ii) market conditions need to be taken into account in designing agricultural development scenarios; and (iii) the learning process during the transition to conservation agriculture requires time. The DATE approach not only enables the co-design of ICSs with farmers, but also incorporates training and extension dimensions. It feeds back practitioners’ questions to researchers, and provides a renewed and extended source of innovation to farmers. Copyright © Cambridge University Press 2015
Lestrelin G.,IRD Montpellier |
Nanthavong K.,Provincial Agriculture and Forestry Office |
Jobard E.,Agro ParisTech |
Keophoxay A.,National Agriculture and Forestry Research Institute NAFRI |
And 4 more authors.
Outlook on Agriculture | Year: 2012
Over the past decade, efforts have been made to promote conservation agriculture as an ecologically sound alternative to tillage-based agriculture in the Lao People's Democratic Republic (PDR). This paper assesses some of the outcomes of a five-year research project aimed at developing sustainable no-till cropping and pasture systems and promoting their adoption by smallholders in Xieng Khouang province. Based on extensive household surveys in 20 villages, it highlights key environmental and socioeconomic factors influencing the adoption and diffusion of conservation agriculture. Finally, it provides policy recommendations to facilitate agricultural innovation and provide greater incentives for farmers to shift towards more sustainable farming practices.