Poster31: Technology development to improve the sustainability of cassava production systems in Laos

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CIAT

Poster for CIAT 2009 Knowledge Sharing Week

Tecnología

Technology Development to Improve the Sustainability of Cassava Production Systems in Laos Introduction Cassava ( Manihot esculenta Crantz) is becoming an economically important crop for smallholder farmers in Laos. This crop not only provides poor farmers with food, feed, and income, but also act as catalysts that can transform subsistence farming into income-generating farming, allowing smallholder farmers to join the market economy. In Laos, major constraints in cassava production systems are the lack of improved varieties and appropriate agronomic practices, degraded soils, and poor access to markets. With financial support from the Nippon Foundation of Japan, research by CIAT and its national partners has been helping to alleviate these constraints by developing new technological options in the Lao PDR since 2004. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Conclusions In the Lao PDR, the introduced CIAT-related cassava varieties produce significantly higher yields in many parts of the country. Varieties better adopted to highland conditions and cold winters are being selected. Farmers can get higher cassava yields and increase their net income by using balanced fertilization. Hedgerows markedly reduced soil loss by erosion where cassava was grown on sloping lands. To get the greatest benefits and achieve impact, farmers need to be involved in the field trials and then adopt the varieties and practices most suitable for their own conditions. Successful adoption depends greatly on well-informed, farmer participatory decision-making made possible by good science and user-friendly research methodologies. Urgent steps are necessary to increase yields, to improve the sustainability of production, and to reduce production costs, which will all have large positive impacts on the livelihoods of smallholder farmers. Table 1. Results of a cassava variety trial at the Rice and Commercial Crop Research Center, National Agriculture and Forestry Research Institute, Laos (Average yields of 2 years, 2007/8 and 2008/9 ) Tin Maung Aye and Reinhardt Howeler, CIAT-Bangkok, FCRI, Dept. of Agriculture, Chatuchak, Bangkok 10900, Thailand; email: t.aye@cgiar.org; r.howeler@cgiar.org Figure 1. Screening of highland cassava varieties in Thumphong village, Nonghet district of Xieng Khouang province, Laos ( 19 ْ 30’ 23”N; 104 ْ 03’ 47.6”E at 1,318 masl) Figure 2. Contour hedgerows of Paspalum atratum hedgerows ( in back) markedly reduced soil loss by erosion on 10% slope in X ieng Khouang province, Laos. * CIAT-related cassava varieties: Having germplasm from CIAT in one or both parents Variety Fresh root yield (t/ha) Starch content (%) Main features Rayong 72 * 27.44 a 23.19 b High yield, drought tolerant KU 50 * 27.06 a 24.36 a High yield, high dry matter KM 98-1 * 25.53 a 23.76 b High yield, dual purpose South China 205 18.98 b 18.27 d High yield on good soil NARC 48 15.79 c 18.63 d Eating purpose Hanatee 12.96 d 19.79 c Eating purpose

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Poster31: Technology development to improve the sustainability of cassava production systems in Laos

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Poster31: Technology development to improve the sustainability of cassava production systems in Laos