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- W2273148592 abstract "Mulch can be highly beneficial for rehabilitation, stabilising the ground surface and providing establishing seedlings with a protected microenvironment. Mulch and compost from green waste material are used for landscaping, roadside revegetation and degraded land rehabilitation projects in northern Australia. A major concern is the presence of weed seeds, including the presence of seeds of the many declared weed species. Mulch can be pasteurised by microbiological activity and seeds destroyed by exposure to high temperatures for a sufficient duration. Information on lethal temperature and storage conditions was not available for weed species in the tropical conditions of the Northern Territory. This project determined the temperature, moisture and storage requirements to kill a range of weed seeds in mulch in Darwin. Seeds of Andropogon gayanus, Caryotis mitis, Centrosema molle, Hyptis suaveolens, Leucaena leucocephala, Mimosa pigra, Pennisetum pedicellatum, Pennisetum polystachion and Stachytarpheta australis were assessed. Seed viability and dormancy mechanisms were investigated to determine if viability could be assessed using germination after application of dormancy-breaking treatments. Seeds were then exposed to various temperature, moisture ans storage conditions in controlled temperature incubators and in experimental mulch piles. Under dry heat conditions, seeds could survive for three months at 70°C, but significant mortality occured after 1 month if the seeds were stored at 80°C. Under moist conditions mortality was acieved at lower temperatures. In the experimental mulch piles, significant mortality occured for some species even when stored for one week. It is necessary to maintain appropiate temperature and moisture conditions, as well as storing the mulch for over a month, to achieve high levels of weed seed mortality and to minimise the spead of weed seeds to revegetation projects via the application of mulch." @default.
- W2273148592 created "2016-06-24" @default.
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- W2273148592 date "2005-01-01" @default.
- W2273148592 modified "2023-09-26" @default.
- W2273148592 title "Mulch for Revegetation in Tropical Northern Territory: Establishment Elixer or Trojan Horse?" @default.
- W2273148592 hasPublicationYear "2005" @default.
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