Effect of Cultivar, Temperature and Seed Size on the Germination and Emergence of Soya Beans (Glycine max (L.) Merr.)

Publisher Website
Google Scholar
Abstract
The rapid and uniform establishment of soya bean [Glycine max (L.) Merr.] stands is conducive to higher yields. This study was undertaken to determine the effects of cultivar, temperature, and seed size on the rate of germination and emergence. No cultivar effect on the germination rate was observed. However, in an emergence study from a sand-soil-peat mixture, cultivar differences in emergence rates were noted(‘Chippewa 64’ > ‘Wayne’ > ‘Amsoy 71’). In another emergence study (sand media) the cvs ‘Calland’ and ‘Williams’ emerged faster than the cv. 'Wayne or ‘Wells’. Time required for 50 per cent germination decreased (18.8–4.0 days) as the temperature increased from 10 to 30 °C (5 °C increments). Emergence (50 per cent) from a sand-soil-peat mixture was more rapid (19.8–6.3 days) as the simulated planting date (growth chamber set to simulate field temperatures) was delayed from 16 April to 15 June with an intermediate date of 16 May. In addition, time required for 50 per cent emergence of the cultivars from sand decreased (793–76 h) as the temperature was increased from 10 to 30 °C with no decrease from 30 to 35 °C. Seed size effects were apparent, with the very small seed germinating slower than the three larger seed sizes. In the emergence studies with both the sand and sand-soil-peat mixture there was a general trend toward more rapid emergence with the smaller seeds. However, the absolute differences were small. Significant cultivar x temperature interactions were observed for the germination and emergence rates. In most cases the cultivars merged in terms of germination and emergence rates at temperatures between 10 and 20 °C and at the higher temperatures the cultivar rankings were different from those observed at temperatures below the merging point.

This publication has 0 references indexed in Scilit: