Abstract
The effects of crop rotation sequences and combinations on soil nematode populations were investigated. Tillage versus non-tillage treatments were applied to crop rotation sequences dominated by flooded rice in a split plot design. The rotated crops were rice, soybean, and corn, including a fallow for a total of eight rotation treatments. All nematode feeding groups were recovered i.e bacterial feeding-, fungal feeding-, plant feeding-, carnivorous-, and omnivorous- nematodes. A total of 24 nematode genera in 20 families were identified and categorized into their respective trophic groups and colonizer persister (cp) values. All rotations that included soybean significantly (P<0.05) or numerically increased soil nematode populations, irrespective of trophic groups, while all rotations that included rice and corn, had a nematode reductive effect. No-tillage plots recorded significantly higher populations of the predatory nematodes. The effectiveness of a rotation sequence depends primarily on the crop species and secondarily on soil conditions e.g anaerobic.
Highlights
The success of crop rotations in soil pest suppression is predicated on mixing crop species sequences so as to create varying patterns of resource competition, allelopathic interference, soil disturbance, and mechanical disruptions
We investigated the influence of crop rotation sequences on soil nematode populations in the rice agroecology of Stuttgart, Arkansas
Higher numbers of these nematodes were recovered during plant establishment as compared to harvest and in no-tillage plots as compared to conventional tillage, though these differences were not significant
Summary
The success of crop rotations in soil pest suppression is predicated on mixing crop species sequences so as to create varying patterns of resource competition, allelopathic interference, soil disturbance, and mechanical disruptions. These conditions in turn lead to an unstable and frequently inhospitable environment that prevents the proliferation of a particular pest species (Roger et al, 1989). Arkansas rice is known for its versatility and can be used in a wide variety of cuisines. It is enjoyed in the United States and throughout the world. Rice production is a major backbone to the State’s economy
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