Dry matter production and dinitrogen fixation of wild and cultivated soybean varieties as affected by pod removal
Year: 1988
Type: article
Abstract: A wild soybean variety (Glycine soja (L.) Sieb and Zucc cv. Nakei-No. 1, indeterminate type) and 2 soybean cultivars (Glycine max (L.) Merr. cv. Tamahomare and Harosoy 63, determinate and indeterminate types, respectively) were grown in pots. The two soybean cultivars were also grown in the field without an application of combined-N. The effect of pod removal on dry matter production and dinitrogen-fixing activities were determined. 1. The total dry weight of the control soybean cultivars increased markedly due to the increase of the pod weight during the experimental period, whereas the increase of the total dry weight in the wild soybean variety was lower.2. Pod removal which resulted in the decrease of plant weight increment in the cultivar Tamahomare, did not affect plant weight increment in the wild soybean variety due to the large compensatory increase of leaf and stem weight.3. Dinitrogen-fixing activity of Tamahomare decreased markedly by pod removal, whereas in Harosoy, the decrease was slight but significant only for the first few days after pod removal. On the other hand, in the wild soybean variety no distinctive difference between control and depodded plants was observed.4. Pod removal decreased the increment of fixed-N in Tamahomare, and slightly decreased it in Harosoy. However, it had no effect in Nakei-No. 1 due to the increase in amounts of fixed-N in stems, petioles, and roots. Based on these results, it is concluded that the effect of pod removal on dinitrogen fixation varies with the cultivars and is largely dependent upon the growth habit of the plant.
Source: Soil Science & Plant Nutrition
Authors: Kounosuke Fujita, Taizo Masuda, Shoitsu Ogata
Institution: Hiroshima University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2047478743