Full TGIF Record # 18318
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Author(s):Lenzen, P.; Skirde, W.
Author Affiliation:Institut f├╝r Bodenkunde und Bodenerhaltung- LANDSCHAFTSBAU der Justus-Liebig-Universit├Ąt Gie├čen, Schlo├čgasse 7, 6300 Gie├čen
Title:Vergleichende Labor- und Freilanduntersuchungen an organischen Zusatzstoffen zur Bodenherstellung und Bodenverbesserung: I. Gr├╝nfl├Ąchen- und Gartenkomposte, Biom├╝llkomposte sowie Perlhumus
Translated Title:Laboratory and field comparisons of organic additives which could be used for soil preparation and amelioration: I. Composts from grasslands and gardens, bio-refuse composts and Perlhumus
Source:Zeitschrift f├╝r Vegetationstechnik. Vol. 13, No. 1, January-March 1990, p. 1-7.
# of Pages:7
Publishing Information:Hannover, W. Germany: Patzer Verlag GmbH and Co. KG, Alter Flughafen
Keywords:TIC Keywords: Composts; Soil amendments; Humus; Organic matter; Water holding capacity
Abstract/Contents:"In order to assess the value of various organic additives, laboratory tests and a field trial were made with samples of composts from grasslands and gardens (GFK), "bio-refuse composts" (BMK) and Perlhumus (PH) , a pelleted soft lignite. The composts were obtained from different parts of the German Federal Republic. Moss peat ("Torf") was used for comparison. The laboratory tests were for preliminary selection as well as to characterize the samples used subsequently in the field trial: some tests were made on the additives pure, and some on mixtures of the additives with sand. The preliminary tests showed big differences in composition. For example, the volume weights of the composts ranged from 440 to 1448 g/litre, water content from 34 to 77 per cent by weight, organic matter from 20 to 45 per cent by weight, and total N from 0,5 to 1,6 per cent. The bio-refuse composts had higher salt contents than the others. Some mixtures were made with sand, adjusted to give a standard organic matter content of 3,5--4,0 per cent by weight. Some of these mixtures were particularly susceptible to compaction. Perlhumus made hardly any difference to the permeability of the sand. For the field trial, mixtures were made consisting of 20 per cent by weight of additive and 80 per cent of sand, except that the Perlhumus was added to the sand at two specific rates per unit area. In spite of a low proportion of organic matter, the mixture with peat was outstanding for water-holding capacity, sward establishment after sowing und [and] initial biomass development. The compost mixture plots performed in different ways: some locked up fertilizer N temporarily, while others showed a notable delayed release of N. The effects of Perlhumus were below average throughout. The big differences among the composts in their immediate and longterm effects, especially when compared with peat, make it essential to develop products with predictable characteristics and consistently high quality." Seven composts were tested in all, with twelve different soil mixtures. Grasses with a high level of tolorance towards wear as well as temperature and dryness were planted. Although tha addition of sand has a positive effect upon the composts, in general they demonstrate deviations in water holding capacity (33-77%), percentage of organic substance (20-45%), and nitrogen content (0.5-1.6%).
Note:Summary lang.: De., En.
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Lenzen, P., and W. Skirde. 1990. Vergleichende Labor- und Freilanduntersuchungen an organischen Zusatzstoffen zur Bodenherstellung und Bodenverbesserung: I. Gr├╝nfl├Ąchen- und Gartenkomposte, Biom├╝llkomposte sowie Perlhumus. (In German) Zeitschrift f├╝r Vegetationstechnik. 13(1):p. 1-7.
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