Optimal Utilization of Light Energy in Semiclosed Greenhouse Using Three-Dimensional Cucumber Model

Figure 3

Sigmoid growth curve of organ expansion. y = max is the asymptote at the top of the curve, which represents the theoretical maximum value of organ expansion; (x₀, y₀) is the inflection point of the curve, which represents the point when the organ expansion reaches the maximum rate; is the slope at the inflection point and represents the maximum rate of organ expansion.