Astute Fungal Carns 100um The volume of soil exploited can be increased by the elaboration of root hairs (left), and by symbiotic associations with ectomycorrhizal fungi (centre)or vesicular-arbuscular mycorrhizae(right)
• The volume of soil exploited can be increased by the elaboration of root hairs (left), and by symbiotic associations with ectomycorrhizal fungi (centre) or vesicular-arbuscular mycorrhizae (right)
Detail of a root hair absorbing water and nutrients including phosphorus from to soil solution Water and nutrients taken in frcm the sod soluton R oot hair Ar span Soil solan Sos parte
0.6 05 ●Rape Tomato 器04 60.3 ●Lo|ium E0.2 ● Maize ● Onion 0 20 40 60 80 Volume of the root hair cylinder (mm cm From Marschner Mineral Nutrition of higher plants"2nd Edition, Academic Press, 1995
From Marschner “Mineral Nutrition of Higher Plants” 2nd Edition, Academic Press, 1995
影响根系生长的土壤条件 1、养分供应 土壤养分有效性影响根系的生长和 分布 根系生长的趋肥性在施肥点周围或 有机肥周围,根系密集,而在养分缺乏 的地方根系较少。这就叫根系的趋肥性
三、影响根系生长的土壤条件 1、养分供应 土壤养分有效性影响根系的生长和 分布。 根系生长的趋肥性 在施肥点周围或 有机肥周围，根系密集，而在养分缺乏 的地方根系较少。这就叫根系的趋肥性
Root Lateral root length(cm) zone Uniform Localised supply supply Basal 40 Middle 332 Apical 18 11 From Drew and Saker(1978)Journal of Experimental Botany 29: 435-451
From Drew and Saker (1978) Journal of Experimental Botany 29: 435-451 Root Lateral root length (cm) zone Uniform supply Localised supply Basal 40 14 Middle 27 332 Apical 18 11