Year: 1981
Type: article
Abstract: Cabbage plants were grown under graded levels of nitrogen supply in nutrient solution (5, 50, 500 ppm N) or graded levels of light intensity (100, 61, 34% of natural light), and the effects of each treatment on the growth and 14CO2 and 15NO3-N assimilation of the plants were studied. As the nitrogen supply increased, the plant dry weight increased from 5 to 50 ppm N and decreased at 500 ppm N. Plants grown at 50 ppm N had the highest sugar content and the highest rate of 14 CO2 assimilation. This was why efficient cabbage-head development occurred at 50 ppm N. As the light intensity decreased, so the plant dry weight and the cabbage-head yield decreased, resulting from a decrease in the sugar content and in the rate of 14CO2 assimilation. The 15NO3-N uptake by the plants was smaller at a low light intensity than at a high light intensity, and in the plants at the low light intensity the incorporation of 15N into the 80% ethanol-insoluble fraction in the cabbage-head was impaired. The later the growth stage, at which 14CO2 was assimilated by the plants, the greater was the 14C-retention percentage at harvest time and the distribution of 14C into the cabbage-head. The 14C-retention percentage decreased with increase in the nitrogen supply or decrease in the light intensity.
Source: Soil Science & Plant Nutrition
Authors: Tetsuo Hara, Yoji Sonoda
Institution: Gifu University
Language: English
Subfield: Agronomy and Crop Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W1980963540