Author
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Russo, Vincent |
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Submitted to: American Society for Horticultural Science
Publication Type: Abstract Only Publication Acceptance Date: 8/12/1996 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Monoculture can lead to reduced yields due to pressure from biotic or abiotic sources. This pressure may be reduced by rotating crops. In the 1st year, 0.5 ha of a Bernow fine-loamy, siliceous, thermic Glossic Paleudalf soil was planted to peanuts at Lane, Oklahoma. In each of the following 5 years the area was subdivided in to 4 rotations which were replicated 4 times. Bell pepper, cucumber, navy bean and cabbage were planted after 1-, 2-, or 3-years of peanuts. The 1st vegetable planting in each rotation was followed by either vegetables or peanuts, and these crops were planted in 3 of the 6 years in each rotation. Half of each plot was treated with soil fungicides, and half of the peanut plots were treated with foliar fungicides. Sclerotia, likely in the genera Sclerotia and Sclerotinia, were counted in the spring of each year starting in the 2nd year. Peanut yields in the 1st year were 6.6 Mg ha**1, but were less than 2.5 Mg ha **1 thereafter. Yield of vegetables planted to follow 1 or 2 years of peanuts were normal for this location. Yields in later vegetable plantings in these rotations were reduced by 50%, and yields of vegetables planted after 3 years of peanuts were significantly less than vegetables planted after 1 or 2 years of peanuts. Numbers of sclerotia fluctuated over time, but number in the spring of the 2nd year were the same as in the spring of the 6th year. The vegetables tested here showed significant reduction in yield when planted following 2 or more years of peanuts. |
