They certainly do mention this:

> Broccoli cultivated under them grew more slowly, requiring an additional 25 days for harvest, but produced roughly the same yield. Meanwhile, these magenta sunscreens improved the microclimate below, reducing the “vapor pressure deficit”—a measure of when plants need to halt photosynthesis to avoid excessive water loss. This may have improved the plants’ efficiency in converting sunlight into plant biomass, which increased by 2.8- to 4.5-fold compared to unshaded plants.

> The shaded plants’ levels of macronutrients such as calcium, magnesium, and phosphorus were either higher than or similar to unshaded plants, while levels of some micronutrients such as iron, copper, and zinc were slightly lower.

▲

Zedseayou 3 hours ago | parent [-]

I think you're missing the point made above: the paper compares apples to apples (broccoli with and without shade) for good reason, but the ability to cool the microclimate may enable crop substitution that has better output/value in areas where it is normally too hot for that crop.

	▲	KaiserPro an hour ago \| parent [-]
		This isn't something that's particularly obvious unless its pointed out, poly tunnels work on two fronts: 1) extend the growing season/climate control 2) scatter direct light into bright ambient light meaning that plants aren't scorched. "leafy" plants like pumpkins, tomatoes, cucumbers etc "wilt" when in direct sun. they go floppy to stop evaporation. THis means they don't grow as fast. If you even out that light so its not directly heating the living shit out of the leaves, they grow faster, because they have less time in stress.