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Agronomy Journal Abstract -

Salinity, Irrigation Frequency, and Fertilization Effects on Barley Growth1


This article in AJ

  1. Vol. 72 No. 6, p. 969-974
    Received: July 5, 1979

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  1. R. J. Wagenet2,
  2. W. F. Campbell2,
  3. A. M. Bamatraf2 and
  4. D. L. Turner2



The response of a grain crop to yield variables such as salinity, soil fertility and irrigation often depends upon the integrated and simultaneous effects of these factors. A greenhouse study was therefore conducted to investigate the interactive effects of water salinity, N and P fertilization, and irrigation scheduling on barley (Hordeum vulgare L.). Three water salinity levels, four N fertilization rates, three P fertilization rates, and three frequencies of water application were imposed on a nonsaline, nongypsiferous, silty clay loam soil (aquic ustifluvent). Dry matter and grain yields, and several yield components were measured. Dry matter and grain yields were reduced with decreasing irrigation frequency (2 to 8 days) and increasing salinity of irrigation water (0.5 to 13.5 mmho/cm). Nitrogen fertilization did not roduce greater salt tolerance, and resulted in reduced yielfby promotion of tillering at the expense of grain filling. Neither dry matter nor grain yield changed appreciably with increasing P fertilization. Increases in dry matter and grain yield were associated with decreases in the leaching fraction (LF) to a certain limit, then yield declined as LF decreased. The salinity of the soil extract increased noticeably as irrigation water salinity increased. However, frequent irrigation prevented salt buildup.

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