Germination of Range Plant Seeds at Fixed Temperatures

Abstract

Low temperatures in the 4-10C (39-50F) range were found in the laboratory to delay germination of pasture plants, especially of perenial grasses. Analysis of meteorological data showed temperatures in this range to be prevalent during rainfall periods in the winter (sowing) season in Israel's semi-arid South, and they are considered a critical factor in seeding perennial grasses on arid range. Germination may be improved by agronomic measures, such as plant selection and breeding for cold resistance and seedling vigour, timing of seeding operations, and soil surface treatments to increase soil temperature.