Effects of Soil Bulk Density on Morphology and Biomass of Leymus chinensis
With the rapid development of agriculture and animal husbandry, agricultural machinery crushed and overgrazing trampled, the soil compaction of grassland has been increased. In order to know the adaptation of Leymus chinensis to soil compaction, the effects of soil different bulk density 1 400. 8, 1 557, 1 640, 1 706. 3, 1 797. 7 kg·m-3on the growth of Leymus. chinensis were investigated by using soil columns. The results indicate that module density would be increased significantly with the increase of soil compactness from 1 557 kg·m-3to1 706. 3 kg·m-3, but decreased significantly to 1 797. 7 kg·m-3. The leaf density and tiller density would be increased, while the soil compaction is increasing to improve the utilization rate of solar energy. Rhizome biomass, root biomass and root shoot ratio would increase with the increasing soil compaction to improve rhizome biomass allocation. It reveals that Leymus. chinensis could respond to compact soil by changing its morphological plasticity.
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万方数据
维普
