Experimental study of the effect of the compaction of soil in the development of pasture plants
1990
Ellies S, Achim | Ramirez, C. | Mac Donald, R. | Gayoso, J. (Universidad Austral de Chile, Valdivia (Chile))
The effect of experimental soil compaction represented by the bulk density in the development of aerial and terrestrial biomass of red clover and ryegrass were studied. The superficial layers of the Metrenco, Fresia and Malihue soils were used in five grades of compactness. The crops were carried out in pots in natural conditions and with irrigation during four months. After harvesting the aerial biomass and the root length and orientation development were taken. The aerial biomass of the clover decrease with the compactness, specially in the Malihue soil. The decrease of growth of the ryegrass began after the intermediate states of compactness. The depth reached by the clover roots was smaller with a greater bulk density. In ryegrass it was not possible to find any relations. An orientation of the clover roots in Melihue soil was not observed. In the Fresia and Metrenco soils dominated a horizontal pattern with the increase of the bulk density. This pattern was found only in the high levels of soil compactness
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