Figure 1.
Schematic representation of different plant combinations.
Figure 2.
Cumulative biomass production.
A, B: total plant biomass of wheat, and faba bean; C, D: shoot biomass of wheat, and faba bean; E, F: root biomass of wheat, and faba bean. iso: isolated plants; mono: monocropped plants; inter: intercropped plants. Open and solid circles, open triangles indicate the mean of actual data at each sampling. All values represent means±SE (n = 3). Curves are derived from the logistic equation using the mean of three replicates.
Table 1.
The maximum biomass and nitrogen (N) uptake of wheat and faba bean estimated by a logistic model (Eqn 1).
Figure 3.
Cumulative nitrogen (N) uptake.
A, B: total plant N uptake of wheat, and faba bean; C, D: shoot N content of wheat, and faba bean; E, F: root N content of wheat, and faba bean. iso: isolated plants; mono: monocropped plants; inter: intercropped plants. Open and solid circles, open triangles indicate the mean of actual data at each sampling. All values represent means±SE (n = 3). Curves are derived from the logistic equation using the mean of three replicates.
Figure 4.
Instantaneous rate of biomass production (A, C, E), and instantaneous rate of nitrogen (N) uptake (B, D, F).
A, B: total rate of biomass production and N uptake by wheat and faba bean of different planting systems. C, D: shoot growth rate and instantaneous per capita N uptake by shoot of wheat and faba bean. E, F: root growth rate and instantaneous per capita N uptake by root of wheat and faba bean. iso w: isolated wheat; mono w: monocropped wheat; iso f: isolated faba bean; inter w: intercropped wheat; inter f: intercropped faba bean.
Table 2.
Times and rates of maximum instantaneous biomass production and nitrogen uptake by wheat and faba bean estimated by a logistic model (Eqn 1).
Figure 5.
Trajectories of cumulative biomass production and cumulative nitrogen (N) uptake of total (A, B), shoot (C, D) and root (E, F) by isolated (iso: open circle and dashed curve), monocropped (mono: open triangles and dashed curve), intercropped (inter: solid symbols and continuous curve) wheat and according faba bean.
Data was derived from the logistic equation using the mean of actual data at each sampling. Numbers near the curves represent the samplings time (day). The dashed line shows the 1∶1 relationship between faba bean and wheat.
Figure 6.
Trajectories of biomass production and nitrogen (N) uptake of total (A, B), shoot (C, D) and root (E, F) by isolated (iso: open circles and dashed line), monocropped (mono: open triangles and dashed curve), intercropped (inter: solid symbols and continuous line) wheat and according faba bean.
Data was derived from the logistic equation using the mean of actual data at each sampling. Numbers near the curves represent the samplings time (day). The dashed line shows the 1∶1 relationships between faba bean and wheat.
Figure 7.
Ratio of instantaneous rate of biomass production of faba bean to that of wheat, and ratio of instantaneous nitrogen (N) uptake rate of faba bean to that of wheat in total (A, B), shoot (C, D) and root (E, F).
Two lines in each graph indicate isolated (iso: open circle and dashed curves), intercropped (inter: solid symbols and continuous curves) wheat and according faba bean. The dashed lines indicate the y = 1. The arrows mean the date (33 DAS) of wheat stem elongation.