Adaptability of Early–Winter Direct–Sowing Cultivation of Paddy Rice using Different Seed Coating Types at 11 Locations in Japan

日本作物学会紀事

article

Kensaku SUZUKI¹  Junichi KASHIWAGI²  Taiken NAKASHIMA²  Kiyoshi NAGASUGA³  Toshihiro MOCHIZUKI⁴  Tomomi ABIKO⁴  Masami FURUHATA⁵  Youichi OHDAIRA⁶  Masahiro CHIBA⁷  Tosiyuki KIMURA⁸  Shinji YANO⁹  Mitsuki ABE⁹  Akira MATSUDA^1,10  Hiroshi SAITO^1,10  Masaki SASAGAWA^1,11  Motonori TAKAHASHI^1,11  Taku NISHIMURA^1,12  Shoichiro HAMAMOTO^1,12  Takeshi TOKIDA^1,13  Masayoshi NISHI¹  Susumu YUI¹  Hiroyuki SHIMONO¹ 

[1] Fac. Agric., Iwate Univ.;Grad. Sch. Agric. Res., Hokkaido Univ.;Fac. Biores., Mie Univ.;Fac. Agric., Kyushu Univ.;Tohoku Agr. Res. Center, NARO;Central Reg. Agr. Res. Center, NARO;West. Reg. Agr. Res. Center, NARO;Agr. Res. Inst., Aomori Pref. Indust. Tech. Res. Center;Yamagata Integ. Agr. Res. Center;Rice Breed. Crop Sci. Expt. Station Yamagata Integ. Agr. Res. Center;Fukushima Agri. Tech. Centre;Grad. Sch. Agri. Life Sci. Univ. Tokyo;Inst. Agro-Env. Sci., NARO;Agri-Innovation Center, Iwate Univ.

关键词: Cool climates;    Direct sowing on well-drained paddy;    Direct–sowing in early winter;    Fungicide;    Rice;    Seed coating;   

DOI  :  10.1626/jcs.91.291

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

To clarify the adaptability of cultivation of paddy rice by direct sowing in early winter, we compared the seedling establishment at 11 locations in Japan in two seasons (2018/19 and 2019/20) using different coating types and sowing dates. Although winter–sown seeds (October, November, January) had poorer seedling establishment than spring-sown seed (April), seed coating decreased the gap between winter-sowing and spring-sowing. Seedling establishment was not affected by the sowing date between October and November in Aomori, Iwate, Akita, Yamagata (2 locations) and Fukushima prefectures over the two seasons. On the other hand, in Niigata prefecture, the seedling establishment was poorer in October than in November due to untimely germination after sowing, and in Mie, Hiroshima and Fukuoka prefectures, it was better in January than in November. In contrast, in Hokkaido, seedling establishment was better when sown in October than in November.　The ratio of seedling establishment per unit seed survival rate was 55% (2018/19) and 69% (2019/20) for seeds sown in spring. The seedling establishment in 2019/20 was higher than in 2018/19 at many locations. The maximum seedling establishment at 11 locations ranged from 39% to 86%, which satisfied the target seedling establishment of 35%. These results showed that seed coating is effective over a wide area for improving seedling establishment of seeds direct sown in early winter.

【 授权许可】

CC BY