Crop succession and rotation with surface liming on nematode management and soybean yield

The objective of this work was to evaluate the effects of crop production systems under no-tillage and with surface liming, after 10 to 11 years, on nematode populations and soybean (Glycine max) grain yield. Twelve treatments were established in a randomized complete block design, with four replicates. The plots consisted of three production systems (monoculture, soybean followed by fallow in the off-season: crop succession, soybean followed by millet in the off-season; and crop rotation, soybean followed by rattlebox. Urochloa ruziziensis, and corn, each one in an off-season), and the subplots, of four rates of surface dolomitic limestone (0.0, 2.0, 4.0, and 8.0 Mg ha(-1)). Crop rotation and sucession favors a higher soybean grain yield, reducing the population of Heterodera glycines in the soil and roots and increasing the populations of Helicotylenchus spp. The increment in surface limestone rates reduces soybean grain yield, with an increase in the population of H. glycines in the soil and roots and a decrease in the populations of Pratylenchus brachyurus and Helicotylenchus spp.

Automated summary

This study evaluated the effects of no-tillage and surface liming on nematode populations and soybean yield. The results showed that crop rotation and succession improved soybean yield and reduced Heterodera glycines population, while increasing the population of Helicotylenchus spp. However, increasing surface limestone rates decreased soybean yield and increased H. glycines population, while reducing the populations of Pratylenchus brachyurus and Helicotylenchus spp.