肥沃度センシング技術と養分欠乏耐性系統の開発を統合したアフリカ稲作における養分利用効率の飛躍的向上

現地圃場試験の播種および移植(課題2)

2020.01.17

現地圃場試験の播種および移植

We aim to evaluate the field performance of selected rice breeding lines developed at JIRCAS on farmer’s fields of several rice producing areas of Madagascar. Therefore, I traveled to Madagascar to establish the field experiments for the 2019-2020 cropping season. Together with our project counterparts (C/Ps) we have sown a set of selected breeding lines (under lowland and upland conditions) to confirm both their field performance (yield), and suitability for the target regions partly through farmers’ participatory approach (for variety selection). In addition, we have sown plot trials for initial inspection and collection of descriptors for release of new varieties. Furthermore, I contributed to the capacity development regarding molecular breeding by performing a short training on extraction of high-quality DNA in our Project laboratory.

Sowing rice seeds in elevated-bed soil under low-land condition. Seeds were evenly distributed in rows across the bed.

After sowing, seeds were covered with a thin layer of
soil, and with non-rice straw to keep optimal soil moisture.

Three-week old seedlings grown in elevated-bed soil. Due to good water availability, surface irrigation was
performed accordingly

Transplanting was performed right after puddling was performed. After a week, weak seedlings were
replaced

Direct sowing was performed under up-land
condition. Holes were made to keep uniform density,
and three seeds were sown in each hole