Trial Report Summary

The Effect of Split Nitrogen Application Rate on Three Varieties of Industrial Hemp in Manitoba

Crop Type(s):
Hemp
Centre(s):
PCDF
Year(s):
2017
Collaborators(s):

Hemp Genetics, Parkland Industrial Hemp Growers, Manitoba Harvest

Objective(s):

To understand the effect of split verses banding nitrogen fertilizer to optimize industrial hemp grain yields.

Project Findings:

 Applying nitrogen at both sites resulted in a significant increase in grain yield.
 Applying nitrogen in a split format verses applying all at seeding increased grain yield at both sites; however, the increase was only significant at the Melita location.
 Lower yields at the Carberry site was most likely a result of below average rainfall, not allowing plants to fully utilize available nutrients.
 Further study is required to understand the potential benefit of split nitrogen application in industrial hemp.

Background:

Current nitrogen recommendations for nitrogen are 80-120 lb/ac, with some suggesting higher rates, depending on variety and growing conditions. However, the economic risk of applying all nitrogen at planting can be high, especially if prolonged stress restricts the plants’ utilization of the added nutrients. Additionally, in many cases it is not logistically possible to apply all the
nutrient requirements at seeding. Split nitrogen applications have the potential to increase seeding efficiencies and allow growers to adjust rates of application according to growing conditions.

PDF:

Entire findings are available by downloading the report PDF.

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