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Evaluation of fall and spring nitrogen rates effect on cereal rye forage crude protein and tillering using NDVI and Canopeo to make infield nitrogen rate decisions

Applied Research

Kendra Rose
Bucyrus

Abstract

Fall applied nitrogen has been used to increase plant tiller and protein in wheat but less research has been done of its effects on cereal rye (Secale cereale) forage and how Normalized Difference Vegetation Index (NDVI) and Canopeo readings can be used to make nitrogen application management decisions. This study took place at the Ohio State University North Central Agricultural Research Station in Fremont, Ohio. The experiment is a randomized complete block split-plot design with four nitrogen rates in the fall (0, 30, 60, and 90 lbs/ac) and in the spring an additional four nitrogen rates over the fall rates of 25, 50, 75, and 100 pounds per acre in rye. Rye was planted in October and harvested in May. NDVI readings were taken in late November before fall dormancy and in the spring after greenup to determine the greenness and density of green matter in an area. Canopeo readings were taken at the same time as NDVI readings to determine the percent of live green vegetation in an area. Fall nitrogen rates increased tillering and have significantly increased spring yield. The results of the NDVI and Canopeo readings were evaluated together to determine if fall applied N increases the tillering density and protein in rye. We are investigating if spring NDVI readings can be used to assist with making spring nitrogen application management decisions. 

Poster has NOT been presented at any previous NACAA AM/PIC

This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.

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Authors: Kendra Rose, Jason Hartschuh, Allen Gahler
  1. Rose, K. Agriculture and Natural Resources Educator, Ohio State University Extension, Ohio, 44820
  2. Hartschuh, J. Dairy Management and Precision Livestock Field Specialist, Ohio State University Extension, Ohio, 43420
  3. Gahler, A. Agriculture and Natural Resources Educator, Ohio State University Extension, Ohio, 43420