20 November 2017 3 1K Report

In Australia, commercial asparagus farms cut back vegetative growth and mulch it into the soil at the end of the growing season in order to return the nutrients in these plant parts to the soil. My question is whether this is better or more metabolically efficient for the crop than allowing natural translocation of nutrients to occur. Essentially the question might be: is uptake of nutrients from the roots more metabolically cost-effective than translocation from vegetative parts?

My current thoughts on this:

  • not all nutrients can be translocated, so cutting and mulching may be necessary at some point.
  • Above ground vegetative growth may be more susceptible to disease at the end of the growing season when it starts to die.
  • translocation should be cheaper metabolically than root uptake
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