Knowledge Center Catalog

Integrated nutrient management strategies: the INSURF [International Network on Soil Fertility and Sustainable Rice Farming] experience in northeast Thailand

By: Contributor(s): Material type: TextTextPublication details: 1994ISBN:
  • 971-22-0060-4
Subject(s): DDC classification:
  • 95-133624
 In: Ladha, J.K.; Garrity,-D.P. (eds.). International Rice Research Inst., Los Banos, Laguna (Philippines). Green manure production systems for Asian ricelands: selected papers from the International Rice Research Conference. Los Banos, Laguna (Philippines). IRRI. 1994. p. 155-171. Received Apr 1995. (UPLB Acc. no. 119007)Summary: Low soil fertility, exacerbated by occasional water deficit due to erratic rainfall, is an inherent rice production constraint in many rainfed lowlands, such as those in northeast Thailand. Integrated nutrient management strategies, therefore, are needed in these disadvantaged areas to improved soil fertility, increase yields, and augment incomes of the small-scale farmers who make up a majority of the 18 million people of this region. This paper summarizes some of the research achievements of the International Network on Soil Fertility and Sustainable Rice Farming (INSURF) during the 1988-91 period at four sites in northeast Thailand, where soils of varying physicochemical properties are noted for their low productivity. Research strategies included the use of a soil conditioner to improve soil physical properties; use of pre- and post-rice green manure (GM) crops, such as Sesbania spp., to increase available nutrients; green leaf manuring; fertilizer management; and crop establishment studies. A cropping pattern trial that included upland crops, such as grain legumes after rice, aimed at using residual soil moisture after the harvest of the rice crop. Research on N mineralization of different GM crops was also undertaken to evaluate N release patterns
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17 graphs; 7 tables; 17 ref. Summary (En) AIBA-SEARCA, College, Laguna 4031 - Philippines

Low soil fertility, exacerbated by occasional water deficit due to erratic rainfall, is an inherent rice production constraint in many rainfed lowlands, such as those in northeast Thailand. Integrated nutrient management strategies, therefore, are needed in these disadvantaged areas to improved soil fertility, increase yields, and augment incomes of the small-scale farmers who make up a majority of the 18 million people of this region. This paper summarizes some of the research achievements of the International Network on Soil Fertility and Sustainable Rice Farming (INSURF) during the 1988-91 period at four sites in northeast Thailand, where soils of varying physicochemical properties are noted for their low productivity. Research strategies included the use of a soil conditioner to improve soil physical properties; use of pre- and post-rice green manure (GM) crops, such as Sesbania spp., to increase available nutrients; green leaf manuring; fertilizer management; and crop establishment studies. A cropping pattern trial that included upland crops, such as grain legumes after rice, aimed at using residual soil moisture after the harvest of the rice crop. Research on N mineralization of different GM crops was also undertaken to evaluate N release patterns

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