TY - JOUR
T1 - Effects of tillage on growth, yield and root lodging of six maize hybrids in upland fields converted from paddy fields in Andosol
AU - Shinoto, Yoshiya
AU - Matsunami, Toshinori
AU - Otani, Ryuji
AU - Maruyama, Sachio
N1 - Funding Information:
This work was supported by a grant from the commissioned project study on ‘Research for low-cost production and utilization of self-sufficient forage crops with high yield and high nutritional value’, of the Ministry of Agriculture, Forestry and Fisheries, Japan. We would like to thank Mr. Hisashi Sato for technical advice on the measurement of root lodging resistance. We would also like to thank Mr. Soichi Nakayama, Mr. Akito Kubota and Dr. Hiroshi Uchino for statistical analysis. We are grateful to Mr. Akio Yoshida, Mr. Yukihiro Miura, Mr. Daisuke Kato, Mr. Atsushi Ogasawara, Mr. Hiroki Takahashi, Mr. Eiko Takahashi, Mr. Kazuhiro Kudo, and Mr. Nobuyuki Yoshizawa for field management and data collection in the study. Finally, we would like to thank Ms. Kumi Sakaki for data collection.
Publisher Copyright:
© 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2020/1/2
Y1 - 2020/1/2
N2 - We investigated the effects of tillage on growth, grain yield and root lodging of maize hybrids in upland fields converted from paddy fields in Andosol of northern Tohoku. Six hybrids were grown with rotary tilling or plowing (chisel plowing plus power harrow) in 2016 and 2017. Soil penetration resistance was higher in plowing than in rotary tilling under a soil depth of 5 cm. There were no significant interactions between hybrid and tillage method in plant height, SPAD value, grain yield, and yield components, indicating that growth and grain yield of the six hybrids were unaffected by tillage method. Maize hybrids had similar culm length and ear height, while horizontal pulling resistance was higher in plowing than in rotary tilling. In addition, root lodged plants caused by typhoons were fewer in plowing than in rotary tilling in 2017. There was a negative correlation between horizontal pulling resistance and the number of root lodged plants. The highest horizontal pulling resistance and the least number of root lodged plants were found in a maize hybrid KD641 grown by plowing. The results suggest that root lodging can be alleviated by growing root-lodging-resistant maize hybrids such as KD641 with plowing.
AB - We investigated the effects of tillage on growth, grain yield and root lodging of maize hybrids in upland fields converted from paddy fields in Andosol of northern Tohoku. Six hybrids were grown with rotary tilling or plowing (chisel plowing plus power harrow) in 2016 and 2017. Soil penetration resistance was higher in plowing than in rotary tilling under a soil depth of 5 cm. There were no significant interactions between hybrid and tillage method in plant height, SPAD value, grain yield, and yield components, indicating that growth and grain yield of the six hybrids were unaffected by tillage method. Maize hybrids had similar culm length and ear height, while horizontal pulling resistance was higher in plowing than in rotary tilling. In addition, root lodged plants caused by typhoons were fewer in plowing than in rotary tilling in 2017. There was a negative correlation between horizontal pulling resistance and the number of root lodged plants. The highest horizontal pulling resistance and the least number of root lodged plants were found in a maize hybrid KD641 grown by plowing. The results suggest that root lodging can be alleviated by growing root-lodging-resistant maize hybrids such as KD641 with plowing.
KW - Horizontal pulling resistance
KW - maize hybrids
KW - plowing
KW - root lodging
KW - rotary tilling
KW - upland field converted from paddy field
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U2 - 10.1080/1343943X.2019.1693277
DO - 10.1080/1343943X.2019.1693277
M3 - Article
AN - SCOPUS:85075416501
SN - 1343-943X
VL - 23
SP - 39
EP - 47
JO - Plant Production Science
JF - Plant Production Science
IS - 1
ER -