Chapter 7 Factors effecting the plant uptake
Chapter 7 Factors effecting the plant uptake
Factors effecting the plant uptake 影响养分吸收的因素主要包括介质中的养分浓度、温 度、光照强度、土壤水分、通气状况、土壤pH值、养分离 子的理化性质、根的代谢活性、苗龄、生育时期植物体内养 分状况等。 The main factors that control plant nutrients uptake as follow: the ion concentration in the nutrients medium, temperature, light, soil water, soil atmosphere, the properties and characteristics of nutrients, plant age and root activity etc
影响养分吸收的因素主要包括介质中的养分浓度、温 度、光照强度、土壤水分、通气状况、土壤pH值、养分离 子的理化性质、根的代谢活性、苗龄、生育时期植物体内养 分状况等。 The main factors that control plant nutrients uptake as follow: the ion concentration in the nutrients medium, temperature, light, soil water, soil atmosphere, the properties and characteristics of nutrients, plant age and root activity etc. Factors effecting the plant uptake
Ion concentration in the nutrient medium 在低浓度范围内,离子的吸收率随介质养分 浓度的提高而上升 在高浓度范围内,离子吸收的选择性较低, 而陪伴离子及蒸腾速率对离子的吸收速率影响较大。 When plant starved are exposed to nutrient solutions with increasing concentration of lacking nutrient, the plot of uptake may be reflected by a Michaelis-menten cure
在低浓度范围内，离子的吸收率随介质养分 浓度的提高而上升. 在高浓度范围内，离子吸收的选择性较低， 而陪伴离子及蒸腾速率对离子的吸收速率影响较大。 When plant starved are exposed to nutrient solutions with increasing concentration of lacking nutrient, the plot of uptake may be reflected by a Michaelis-Menten cure. Ion concentration in the nutrient medium
Figure 12: 86Rb*(K*)Uptake by barley roots at low and high Rbcl or Rb2 SO, Concentration Figure 13: 13NO3: Influx into roots of barley, never before exposed to NO3 2肖星 ,,0,i5,如lio如如布动 0o7。a1a3 Rbcl or Rb2SO4 CoNCENTRAT ION(mH
The effects of interruption of nutrients supply 植物对养分有反馈调节能力。中断某种养分的 供应,往往会促进植物对这一养分的吸收。 Plants which have been starved of particular nutrient may take up the nutrient at a high rate when re-supply the nutrient
植物对养分有反馈调节能力。中断某种养分的 供应，往往会促进植物对这一养分的吸收。 Plants which have been starved of particular nutrient may take up the nutrient at a high rate when re-supply the nutrient. The effects of interruption of nutrients supply