ISSN:
1365-2494
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
Notizen:
During the interval from seed set to advanced shedding in a crop of S24 perennial rye-grass, a study was made of: seed drying, the increase in germinating capacity and weight of seed, and the shedding of florets. The seed in early-emerged heads dried more rapidly than that in later heads, and the seed in the upper parts of each spike was drier than in the lower parts. Seeds in early heads attained maximum germination values about 18 days after anthesis. The maximum value was lower in later heads and was not reached until approximately 26 days. Seed in early heads was 67% heavier than that in late heads and the basal florets in each spikelet contained heavier seed than more distal ones. The maximum weight of individual seeds was reached at about the same time in early-emerged and intermediate heads, at about 22 to 26 days after anthesis. Seed in late heads continued to inerease during the whole interval studied. Shedding began before seed reached maximum dry weight and continued at a constant rate. The combination of these processes led to the maximum yield of seed, of 100% germination, being obtainable over a period between 20 and 26 days after anthesis. Criteria are given which would permit this stage to be recognized.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1365-2494.1964.tb01185.x
