Effects of the Roughness of Paddy Field After the Kumamoto Earthquake on the Growth and Yield of Soybean

日本作物学会紀事

Seisaburo Sakae^5¹  Naoki Ishitsuka^6²  Nobusuke Iwasaki^7³  Toshihiro Sakamoto^8⁴  Naoki Matsuo^2⁵  Ryosuke Nomiyama^1⁶  Yasuyuki Wakiyama^3⁷  Shohei Shibata^4⁸ 

[1] Kumamoto Prefecture Agricultural Research Center^5;NARO Institute of Agro-Environmental Sciences^6;NARO Institute of Agro-Environmental Sciences^7;NARO Institute of Agro-Environmental Sciences^8;NARO Kyushu Okinawa Agricultural Research Center, Chikugo Research Station^2;NARO Kyushu Okinawa Agricultural Research Center^1;NARO Kyushu Okinawa Agricultural Research Center^3;NARO Kyushu Okinawa Agricultural Research Center^4

关键词: Kumamoto earthquake;    Wet injury;    Soybean;    Roughness of paddy field;   

DOI  :  10.1626/jcs.87.176

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The Kumamoto Earthquake in 2016 caused severe roughness of paddy fields in Kumamoto-city, However, leveling of the soil surface was not performed before planting soybean seeds. Thus, it was anticipated that soybean plants grown in concave positions were exposed to wet injury. In this study, we examined the effect of the roughness of the soil surface on the growth and yield of soybean. The seed yield in the concave position was decreased 50% by the reduction in the number of pods m–2 compared with seed yield in the convex position. The reason for the reduction in yield was that soybean root in the concave position was damaged by wet injury, which depressed nodule activity and water uptake ability. Therefore, leveling of the soil surface should be performed for succeeding sustainable crop production in such fields. If leveling is not practical, planting seeds which were disinfected and regulated in moisture content should be used for reducing the damage by wet injury in the concave position. Furthermore, it might be effective for enhancing the drainage from the field to dig an open ditch in the concave position.

【 授权许可】

CC BY