主要畑雑草種子の出芽深度について

概要

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1. In order to investigate the emergence depth of main weed seeds, seeds of 10 species were sown in Wagner pots (1/2.000 are) at 1, 5 and 10 cm depth on May 1974, and in the field at 0, 1, 3, 5 and 10cm depth on November 1978. These studies were carried out at Kitamoto, Saitama. 2. The maximum emergence depth of each species were as follows: Echinochloa crus-galli var. praticola, Commelina communis: 10cm Digitaria adscendens, Polygonum lapathifolium, Acalypha australis, Chenopodium album: 5cm Fatoua villosa : 3cm Portulaca oleracea: 2cm Cyperus microirio : 1cm The maximum emergence depth of Amaranthus lividus varied from 1cm to 5cm. 3. Emergence percentage of Digitaria adscendens and Cyperus microiria varied with days after harvest. Namely, emergence percentage of these species passed over. one year after harvest were higher than that of these species within one year after harvest. This fact correlated with light requirement for germination. Especially, Cyperus microiria seeds maintained high light requirement even at one year after harvest. 4. Emergence percentage at soil surface of Polygonum lapathifolium and Commelina communis were very low as compared with that at 1 or 3 cm depth.
日本雑草学会の論文
1979-12-25