Viability of Weed Seeds Following Manure Windrow Composting

Autor: Gary Lesoing, Bahman Eghball
Rok vydání: 2000
Předmět:
Zdroj: Compost Science & Utilization. 8:46-53
ISSN: 2326-2397
1065-657X
DOI: 10.1080/1065657x.2000.10701749
Popis: Introduction of weed seeds is a concern when using animal manure as a nutrient source on croplands. The viability of weed seeds can be reduced through composting. Experiments were conducted in 1996 and 1997 to determine the effects of manure windrow composting on seed viability of eight weed species. Weed seeds were placed in nylon bags and buried at 25 and 75-cm within the composting windrows of dairy manure and beef cattle feedlot manure with or without water addition. After one turning a week later, the seeds of most weed species survived the composting conditions in the dairy cattle manure. Following the four to five month dairy manure composting process, all weed seeds lost viability except for 14% of the velvetleaf (Abutilon theophrasti) seeds. This occurred even though the temperature within the composting dairy manure windrow never reached 60°C, which is considered necessary for weed seed destruction. In the watered beef feedlot manure, all weed seeds lost viability after one turning. However, see...
Databáze: OpenAIRE
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