Figure 4

Schematic diagram of sampling points for photosynthetic rate in the greenhouse. The height of the sampling points was 1.5 m, and each point was separated by 2 m in the width direction and 1 m in the length direction.

Schematic diagram of sampling points for photosynthetic rate in the greenhouse. The height of the sampling points was 1.5 m, and each point was separated by 2 m in the width direction and 1 m in the length direction.