Effects of Chisel Plowing on Soil Conditions and Nitrogen Absorption of Maize in Upland Field Converted from Paddy Field in Andosol

日本作物学会紀事

Toshinori Matsunami^2¹  Yoshiya Shinoto^1²  Ryuji Otani^3³  Hideaki Kanmuri^4⁴  Sachio Maruyama^5⁵ 

[1] Grad. Sch. of Life and Environ. Sci., Univ. of Tsukuba^2;NARO Tohoku Agr. Res. Cent.^1;NARO Tohoku Agr. Res. Cent.^3;NARO Tohoku Agr. Res. Cent.^4;NARO Tohoku Agr. Res. Cent.^5

关键词: Andosol;    Upland field converted from paddy field;    Chisel plowing;    Nitrogen absorption;    Maize;    Soil environment;    Fertilizer distribution;    Rotary tilling;   

DOI  :  10.1626/jcs.87.125

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In this study, two experiments (Experiment 1&2) were conducted to investigate the effects of chisel plowing on soil conditions and nitrogen absorption of maize (Zea mays L.) in upland fields converted from an andosol paddy field. In Experiment 1, two hybrids were planted under two tillage systems (rotary tilling and chisel plowing), and soil physics, soil chemistry and nitrogen absorption of maize were examined. In Experiment 2, the difference in fertilizer distribution between the two tillage systems was examined. In Experiment 1, the soil penetration resistance value at 0–5 cm depth was nearly the same in the two tilling systems, whereas, at 5–20 cm depth it was larger in the chisel plowing system, than in the rotary tilling system. In the chisel plowing system, the percentage of gas phase at 10 and 20 cm depth was lower and that of the solid phase was higher than in the rotary tilling system. Contents of nitrate nitrogen, exchangeable potassium and available phosphorus at the 6-leaf stage were higher in chisel plowing than in rotary tilling at a 0 –10 cm depth, whereas there were no significant differences between the two tillage systems at the maturity stage. There was no significant difference between the two tillage systems. In Experiment 2, more than 95% of fertilizer was distributed at 0–10 cm in the chisel plowing system, whereas in the rotary tilling system, the fertilizer distribution was almost uniform at 0–20 cm depth. It is concluded that, in the chisel plowing system, penetration resistance was high at 5–20 cm, and furthermore, fertilizer and soil nutrient were concentrated at 0–5 cm at the early growing stage. It is also concluded that chisel plowing allows farmers high-speed work while maintaining nitrogen absorption at the same level as in rotary tilling in an upland field converted from a paddy field.

【 授权许可】

CC BY