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Related Experiment Videos

Managing manure nutrients through multi-crop forage production.

G L Newton1, J K Bernard, R K Hubbard

  • 1Department of Animal & Dairy Science, University of Georgia, Tifton 31793, USA. fig@tifton.uga.edu

Journal of Dairy Science
|July 3, 2003
PubMed
Summary

Dairy manure recycling through forage production offers environmental and economic benefits. Systems including bermudagrass showed advantages in nutrient recovery and economic value, highlighting sustainable agricultural practices.

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Area of Science:

  • Agricultural Science
  • Environmental Science
  • Soil Science

Background:

  • Concentrated dairy manure poses a significant water pollution risk, particularly in the southern United States.
  • Dairy manure is a valuable nutrient source that can be recycled through forage production, especially with multi-cropping systems.
  • Integrating manure utilization with forage production offers an environmentally sound solution to nutrient management and water quality concerns.

Purpose of the Study:

  • To evaluate the environmental and economic performance of different triple-crop forage systems utilizing dairy manure.
  • To compare nutrient recovery, forage yield, and quality between systems with varying crop sequences.
  • To determine the most sustainable and economically viable manure-forage management strategy.

Main Methods:

Related Experiment Videos

  • Comparison of two triple-crop systems: corn silage-bermudagrass hay-rye haylage vs. corn silage-corn silage-rye haylage, with manure applied to supply nitrogen (N).
  • Assessment of nitrogen (N) and phosphorus (P) uptake by crops.
  • Economic analysis comparing production costs and crop values.

Main Results:

  • The corn silage-bermudagrass hay-rye haylage system demonstrated greater N and P recovery.
  • The corn silage-corn silage-rye haylage system yielded higher forage quantity and quality.
  • The bermudagrass system proved more economically advantageous due to lower production costs offsetting slightly lower yields.
  • Bermudagrass effectively utilized excess nutrients during the autumn-winter period.

Conclusions:

  • Integrating bermudagrass into triple-crop systems offers both environmental and economic benefits for dairy manure management.
  • Intensive forage systems, including those with bermudagrass, can achieve high-quality forage production while protecting the environment and remaining economically attractive.
  • Optimal manure-forage systems are site-specific, requiring consideration of farm characteristics and local conditions. Buffers and nutrient sinks are crucial for protecting water bodies.