国立研究開発法人 国際農林水産業研究センター | JIRCAS

ATREPSマダガスカルプロ課題3「施肥と育種素材を統合した養分利用に優れた局所管理技術の開発」における現地圃場試験の開始

報告書番号 出張年月 国名 関連プログラム 公表年月日
H31-0319 2019年10月-2019年12月 マダガスカル 農産物安定生産 2020年1月10日

成果の概要

To test the P-dipping technique (seedling roots dipped in phosphorus added soil slurry) as a potential strategy to increase rice yield in the highlands of Madagascar, multi-field experiments were established in two different locations. Twenty lowland rice fields with different P retention conditions of soils at Behenjy and Antohobe were selected to compare P-dipping treatment with conventional P broadcasting and no P (farmer practice) application. The fields for early and normal planting times were transplanted and for late planting times are under way. The effect of P-dipping was clearly observed after two weeks of transplanting and it promoted early growth of rice compared to conventional P and no P application (farmer practice). Pot experiment was also conducted at laboratory of Radioisotopes (LRI), Antananarivo University, to assess the effect of seedling roots injury (roots pruning) to apply the P-dipping technique. We harvested all the pots after 35 days of transplanting and plant samples were taken for further measurement of shoot and root dry weight, and plant nutrient uptake.

マダガスカル