Modelling the effect of weed‐seed distribution in the soil profile on seedling emergence

Grundy, A. C.; Mead, Andrew; Bond, W

doi:10.1111/j.1365-3180.1996.tb01667.x

Cited by 69 publications

(74 citation statements)

References 14 publications

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“…In spite of the fact that the seeds of Ch. album are positively photoblastic, they germinate better in the depth of 10 to 20 mm than on the soil surface (Grundy et al 1996).…”

Section: Chenopodium Albummentioning

confidence: 96%

Seed dormancy and germination of Shaggy soldier (Galinsoga ciliata Blake.) and Common lambsquarter (Chenopodium album L.)

Jursík¹,

Soukup²,

Venclová³

et al. 2003

PLANT SOIL ENVIRON

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Laboratory experiments were carried out with seeds of Galinsoga ciliata and Chenopodium album in 1998, 2000 and 2001. The study involved germination of non-dormant seeds in the light and the dark at 5-30°C, the germination energy at 15, 24, and 33°C, and the primary dormancy of seeds matured during the period from July to October. Both weeds germinated better in the light compared to the dark. Seeds of G. ciliata germinated at 10-33°C. Germination exceeding 85% was recorded at 12-28°C. Ch. album germinated in a wider temperature interval (5-33°C). Maximum germination (75%) was obtained at 18°C. A very high germination energy of G. ciliata seeds was found at 24°C. At this temperature, 89% of seeds germinated during the second and third day of the germination test. Seeds of Ch. album had a low germination energy at 15 and 24°C. The germination energy was high only at 33°C, however, the total germination reached at this temperature was only 26.5%. Both G. ciliata and Ch. album formed primary dormant seeds during all three testing years. The length of primary dormancy varied from 10 to 100 days depending on the date of ripening and on the year. The longest primary dormancy was found with early ripened seeds (July and August).

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“…In spite of the fact that the seeds of Ch. album are positively photoblastic, they germinate better in the depth of 10 to 20 mm than on the soil surface (Grundy et al 1996).…”

Section: Chenopodium Albummentioning

confidence: 96%

Seed dormancy and germination of Shaggy soldier (Galinsoga ciliata Blake.) and Common lambsquarter (Chenopodium album L.)

Jursík¹,

Soukup²,

Venclová³

et al. 2003

PLANT SOIL ENVIRON

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“…Tillage systems may also greatly modify the spatial distribution, composition, and density of weed seed banks in agricultural soils (Wiese, 1985;Buhler, 1995;Clements et al, 1996). For example, Grundy et al, (1996) reported that Stellaria media (L.) Viii., Matricaria spp., Polygonum aviculare L., Veronica persica Poiret and Chenopodium album L. show a reduction in emergence rate with increasing depth of burial by tillage. Harvesting also affects spatial distribution; some seeds may be dispersed by combines to sites more than 50 m away and, thus, may germinate far from the parent plants (McCanny and Cavers, 1988;Zhang and Hamill, 1998).…”

Section: Spatial Heterogeneity Of Weedsmentioning

confidence: 99%

Extent and Implications of Weed Spatial Variability in Arable Crop Fields

Garibay¹,

Richner²,

Stamp³

et al. 2001

Plant Production Science

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: The integration of technologies and principles to assess, manage, and evaluate spatial and temporal variability has enabled the site-specific application of variable rates of agrochemicals. It is referred to as precision management. This article concerns with the potential of precision management for weed control. Weeds are heterogeneously distributed and show different levels of spatial aggregation. A better understanding of weed patchiness is necessary for precision weed management. Studies reviewed in this article showed that significant reduction in the amount of herbicide can be achieved when the spatial variability of weeds is taken into account. It is often difficult, however, to obtain information on the spatial distribution of weeds with accuracy because it depends on monitoring techniques, scales of observation, and statistical methods applied. We conclude that the precision application of herbicides is one approach to managing weeds and it will be possible to achieve a drastic reduction in herbicide applications by using a combination of several different types of weed control strategies. Not only farmers with large fields but also those with small fields should have better access to information on spatial variability to make decisions for weed control.

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“…It has been shown that the depth of planting of the Russian wildrye (Elymus junsceus Fisch) influenced the seedling growth during the seedling year in field planting over 4 years at two locations (McGinnes, 1974). Similarly, Grundy et al 1996 reported that Chenopodium album showed superior seedling performance for seeds planted close to the soil surface except for number of days to emergence. McGinnes (1973) observed that height difference between the range grasses planted at different depths apparently resulted from some form of seedling selection at greater depths.…”

Section: Introductionmentioning

confidence: 86%

“…Some seeds need to be planted deeper than others for best emergence and subsequent desirable growth because they do not need light for germination (Grundy et al 1996). It has been shown that the depth of planting of the Russian wildrye (Elymus junsceus Fisch) influenced the seedling growth during the seedling year in field planting over 4 years at two locations (McGinnes, 1974).…”

Section: Introductionmentioning

confidence: 99%