Year: 1982
Type: article
Abstract: Cabbage plants were grown at graded levels of nitrate nitrogen (20 and 100 ppm N) and temperature (15, 20, and 25°C), and the effects of these treatments on cabbage-head development were investigated. The total plant dry weight and the cabbage-head yield were always higher at 100 ppm N than at 20 ppm N, and at each N level the values were in the order of 20>15>25°C. The nitrogen content in the outer leaves was higher at 100 ppm N than at 20 ppm N, and increased slightly with increase in temperature. The total sugar content was higher in the inner head leaves than in the outer leaves, and was decreased greatly at 25°c in both organs. The 14CO2 assimilation of the outer leaves was larger at 100 ppm N than at 20 ppm N. After 14CO2 assimilation by the plants, a greater amount of uc was lost by respiration at 25°c than at 15 and 20°C, resulting in a low distribution of 14c-sugars in the inner head leaves. The highest yield and a better quality of cabbage-heads were obtained when the plants were grown at 20°C with a high N supply and the outer leaves had a carbohydrate/nitrogen content ratio of about 7.
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: W2067427540