The Effect of burning pastures is the spread of nematodes around the roots of a astragalus and fescue plants.

Document Type : Complete scientific research article

Authors

1 assistant professor of soil science department, Faculty of Agriculture, Malayer University

2 Master's student, Department of Soil Science and Engineering, Faculty of Agriculture, Malayer University, Malayer, Iran.

Abstract

Abstract:
Introduction: Nematodes are microorganisms that play a significant role in soil function, cycle of elements and agriculture. Nematodes are also good indicators of environmental conditions. Therefore, it is necessary to study in the field of nematodes. Fire is known as a cause of soil disturbances on a global scale, which has more consequences on the soil than other natural disturbances. Changing the physical, chemical and biological characteristics of soil is one of the most obvious consequences of fire in natural ecosystems, especially pastures. The purpose of this research was to investigate the effect of vegetation and burning on the abundance of nematodes.
Materials and methods: In order to investigate the effect of vegetation cover and burning on the abundance of soil nematodes, a pasture was selected in Haidara region of Hamedan, where part of the vegetation cover was burned. It was prepared from the shade of the goon plant, the fescue plant, and the soil without vegetation, two days after a spring rain in May 1401, and after determining the latitude and longitude, the samples were placed in plastic and a container (to preserve moisture) to They were taken to the laboratory. Soil characteristics such as texture, weight moisture, organic matter and abundance of nematodes were determined by standard methods. A factorial experiment was conducted in the form of a completely randomized design with three replications, where the first factor of the burning factor was done on two levels (burned and unburned) and the second factor of vegetation cover was done on three levels (green plant, fescue plant and bare soil) with three replications.
Findings: The analysis of variance table showed that the effect of vegetation treatment and burning treatment and their interaction on the abundance of nematodes and soil organic matter percentage was very significant. Vegetation treatment and burning treatment had no significant effect on soil moisture percentage. But the interaction of vegetation cover and burning on soil moisture percentage was significant. The average abundance test of nematodes showed that the highest abundance of nematodes was observed in the unburnt samples in the shaded area and the lowest in the soil without vegetation cover. The average percentage of organic matter test showed that the effect of vegetation in unburned samples on the percentage of soil organic matter was statistically significant and the lowest percentage of organic matter was observed in the soil without cover. There was no statistically significant difference in the average percentage of moisture in the samples of unburned and burned soils, and the average percentage of soil moisture in different vegetation treatments was also without significant difference.

Discussion and conclusion: The results showed that burning the pastures reduces the abundance of nematodes and also reduces soil organic matter. The effect of vegetation cover on nematodes was significant and the population of nematodes in different vegetation and soil without vegetation had significant statistical difference. The percentage of organic matter was also affected by the vegetation cover and its amount showed a significant statistical difference in different vegetation cover and also in the soil without cover. The percentage of moisture in unburned and burned soil and different vegetation covers did not differ significantly. Among the parameters studied in the experiment, only a positive and significant correlation was observed between soil organic matter and the abundance of nematodes.

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Main Subjects

References

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Journal of Soil Management and Sustainable Production
Volume 14, Issue 4
March 2025
Pages 115-129

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