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Abstract

 

This article in SSSAJ

  1. Vol. 22 No. 3, p. 257-259
     
    Received: Jan 22, 1958


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doi:10.2136/sssaj1958.03615995002200030020x

Influence of Soil Temperature and Nitrogen on Ryegrass Growth and Chemical Composition1

  1. W. L. Parks and
  2. W. B. Fisher2

Abstract

Abstract

Annual ryegrass was grown under controlled conditions at different rates of nitrogen fertilization. Alternating periods of 16 hours of light and 8 hours of darkness were maintained in growth chambers set at 10°, 20°, and 30°C. The ryegrass responded to nitrogen fertilization up to the rate of 100 pounds per acre and the response was greatest at the 20°C. temperature. Nitrogen was more efficiently utilized by the ryegrass at the 20° and 30°C. temperature than at the 10°C. temperature. The uptake of potassium, calcium, magnesium, and phosphorus was retarded at the 10°C. temperature. Phosphorus uptake and yield of forage were directly related and the calcium content of the ryegrass increased as the temperature and rate of nitrogen increased.

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