Emergence of weeds as affected by vertical seed distribution in arable soils

Autor:	T. Webster, Trevor K. James, J.E. Waller, A. Rahman
Rok vydání:	2002
Předmět:	Panicum dichotomiflorum biology Chenopodium Digitaria sanguinalis Horticulture Solanum nigrum biology.organism_classification Agronomy Spergula arvensis Insect Science Juncus bufonius Poa annua Weed Agronomy and Crop Science
Zdroj:	New Zealand Plant Protection. 55:213-217
ISSN:	1179-352X 1175-9003
DOI:	10.30843/nzpp.2002.55.3892
Popis:	A glasshouse study examined weed seedling emergence in soils collected from 20 sites. Soil was placed in open topped columns of differing heights and the number of seedlings that emerged were counted. A total of 77 different weed species emerged but most were in small numbers. Four summer broadleaf weeds, black nightshade (Solanum nigrum), fathen (Chenopodium album), spurrey (Spergula arvensis) and willow weed (Polygonum persicaria), showed little restriction and emerged freely from depths up to 50 mm. Of the grasses, summer grass (Digitaria sanguinalis) and annual poa (Poa annua) were clearly constrained at depths greater than 20 mm while smooth witchgrass (Panicum dichotomiflorum) was not. Of the other broadleaf weeds, waxweed (Hydrocotyle sp.) and Lotus sp. were constrained at depths greater than 30 mm while two small-seeded species, cudweed (Gnaphalium sp.) and toad rush ( Juncus bufonius) did not emerge from depths greater than10 mm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::603a3cee3c7f2f7bb42d6449e77b2f89 https://doi.org/10.30843/nzpp.2002.55.3892 Zobrazit plný text záznamu