作者: D. J. Raynal , F. A. Bazzaz
DOI: 10.2307/1934196
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摘要: Seed germination and plant community development on adjacent forest prairie soils (Typic Hapludalf Typic Halplaquoll) were studied to elucidate the causes of variation in composition during first growing season after crop harvest. The number individuals July soil was three times larger than soil. Abutilon theophrasti, Chenopodium album, Polygonum pensylvanicum, Setaria faberii occurred large numbers but considerably less important Ipomoea hederacea predominated seed load abandonment both before overwintering. Total plants that reached maturity significantly higher (at 5% level) Population levels generally constant throughout season. Diversity peaked June Germination Ambrosia artemisiifolia, Lactuca scariola, enhanced by moist conditions, whereas Amaranthus hybridus under dry conditions. most sensitive water stress tolerant. It appears kinds become established an abandoned field are a function germinable seeds present seed—soil relationships. Of parameters may control germination, there is strong evidence suggest moisture extreme upper portion profile major factor.