タバコの被覆栽培に関する研究 : 第4報トンネル内炭酸ガス環境について

概要

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This paper deals with carbon-dioxide environment in cover-culture of tobacco plant. Results obtained are as follows: 1. In the closed type covering (with polyethylene film), carbon-dioxide concentration increased at night, decreased at day. Daily minimum carbon-dioxide concentration in that covering decreased with the number of days after transplanting, and it became as low as the natural air concentration at the 12th (transplanted on May 23rd) after and at the 9th (transplanted on April 5th). On the other hand, carbon-dioxide concentration in the opened type covering (with melamin resin coated paper) was epual to the natural air at day or night. 2. Carbon-dioxide concentration in the closed type covering with paper was influenced by moisture of the paper, i. e. in case of the covered paper wetted with rain or dew, carbondioxide concentration changed in the same course with that in the covering with polyethylen film, but it remained almost constant all day, when the paper was dried. 3. The maximum photosynthetic rate of the tobacco plant in the covering occurred some time between 7 : 00 and 9 : 00 a. m. 4. Dry matter production of tobacco plant in the covering with paper (closed type) was better than the covering with polyetylene film (closed type). It may be one of the reason that carbon-dioxide concentration keeped high in daytime.
日本作物学会の論文
1968-06-10