Full TGIF Record # 92915
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Publication Type:
i
Report
Author(s):Heilinger, Karin; Florineth, Florin
Title:Qualitätsprüfung von nicht gez^Dtuchtetem Saatgut
Translated Title:Quality testing of non-bred seeds
Source:Rasen-Turf-Gazon. Vol. 34, No. 3, September 2003, p. 56-66.
Publishing Information:Bonn, Germany: Hortus Verlag
# of Pages:11
Abstract/Contents:"Vegetation in accordance with the site, guarantees a successful development of a green covering of open areas. A permanent pro-nature and care extensive turf development is possible with seed changed by breeding, to an only limited extent. There are consequently alternative procedures available for a green covering. These include, amongst others, the distribution of threshed hay and hay flowers. Threshed hay is produced by means of threshing the plants by machine, and it contains still remains of stalks and leaves. Hay flowers are available as a result of the drying and storage of the hay in the barn as a fine material. They contain stalks and remains of leaves which are sieved before distribution. However, a control of the quality for this procedure to develop a green covering has not been sufficiently clarified. Within the framework of a thesis at the university of the cultivation of the soil in Vienna different quality characteristics of threshed hay and hay flowers were examined, such as germination power (two methods), number of seeds of wild grasses and wild herbs per 10 g of threshed hay and hay flowers respectively, definition of the species of the 400 selected wild grasses and wild herbs. The test of the germination power is the core of this study and has been carried out in two different ways. The first method power involves the test of germination power by using the Jacobsen germination apparatus, testing 400 selected seeds. A seed pan with 10 g of threshed hay and hay flowers was used in the second method to test the germination power, counting the number of seed types contained. The two methods of testing the germination power were examined and produced, with regard to the relative germination power, very similar results. The relative germination power differs only a few percentage points between the two methods used. The two procedures can consequently be considered of equal value and can be applied for tests of the relative germination power of threshed hay and hay flowers. But, as far as the input of time or the two methods to test the germination power is concerned, there is a considerable difference. The Jacobsen germination apparatus is therefore recommended for the test of the germination power, for practical reasons. Since the finding of the relative germination power of the threshed hay and hay flowers requires a lot of time and does not always produce reliable results, the number of actually germinated seeds per 10 g of threshed hay and hay flowers was actually used as a criterium for the quality test. This characteristic can be found with an only little input of work. In the evaluation, the number of seedlings is an important factor concerning the quantity of the threshed hay and hay flowers respectively to be totally applied in order to guarantee a successful green covering. The results amount to between 167 and 1422 germinating seeds per 10 g for hay flowers. Within framework of these studies the results of threshed hay and hay flowers respectively as far as the germination power is concerned, are very similiar. This is the same with regard to the seedlings. The relation between the number of seeds per sample and seedlings per sample is also similiar for threshed hay and hay flowers. The two procedures for green coverings can consquently be regarded as equally good. The period of observation was sufficiently long for both studies, since both methods applied produced very similiar results of the germination power. When using the germination appartus for the test of the germination power, the normatively considered duration of the experiment was observed. When using the seed pan for the test of the germination power, the period selected amounted to six weeks (42 days). Futhermore, the rhythm of counting in both methods revealed that a great number of the seeds germinates already during the first two or three weeks. It was thus possible to assure that above all, when the germination power of threshed hay and hay flowers in seed pans in a laboratory was concerned, the period of observation selected, was sufficient. Such a quick germination is desirable from an engineering biological point of view, since an area to be covered witha green must be covered quickly. From a nature conservation point of view, the duration of the experiment should be longer, since some species germinate only after a respite. As a further quality characterisitc [characteristic]of alternative materials for a green covering, the number of seeds of wild grasses and wild herbs power 10 g of hay threshed and hay flowers was counted. In addition to that, the species of 400 selected seeds of wild grasses and wild herbs were counted, that is of threshed hay and hay flowers. The experiments carried out do not show a great difference of quality between threshed hay and hay flowers. However, the results of the differend [differed] years and dates of harvests respectively differ considerably. Therefore, when selecting the material for green coverings, when threshed hay and hay flowers are concerned, attention should be paid to the composition of the seeds. The number of seeds is higher for the samples of the hay flowers examined, it is true, but these samples contain a much higher proportion of grasses since they came from meadows which were mowed. The examined samples of threshed hay showed a higher percentage of herbs than those of the samples of hay flowers. The result is a higher thousand point weight of threshed hay. Due to this it is necessary to define the species of the material for green covering, at least by samples taken offhand. It was further found out that there is a greater proportion of herbs in hay samples, the later the date of mowing and threshing. The amount of material required depends very much on the seed quantity of wild grasses and wild herbs and the germinating seed in the individual samples of threshed hay and hay flowers. The proportion of seed fluctuates for threshed hay between 709 and 6,915 seeds per 10 g. The number of germinating seeds amounts to between 167 ans 1,422 per 10 g for threshed hay and hay flowers to between 380 and 1,538 per 10 g. and 1 538 per 10 g. The material required depends consequently on the number of germinating seeds."
Language:German
References:16
See Also:Selected Literature Cited R=69871;
Note:Abstract appears in German, English, and French
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Heilinger, K., and F. Florineth. 2003. Qualitätsprüfung von nicht gez^Dtuchtetem Saatgut. (In German) Rasen Turf Gazon. 34(3):p. 56-66.
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