| Seasonal characteristics of soil water and biomass of siberian wildrye grass （ Elymus sibiricus L．） in Bashang Plateau |
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| DOI：10.7606/j.issn.1000-7601.2009.03.17 |
| Key Words: variation of soil water variation of biomass artificial grassland Bashang Plateau |
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| Abstract: |
| To investigate the seasonal characteristics of soil water storage and crop growth in semiarid Bashang Plateau, field experiments were conducted during 2004～2007.The soil water was measured by TDR, and the water consumption and growth of siberian wildrye grass were determined under the condition of different precipitation years.The results showed that soil water storage decreased to the wilting point at late June, increased quickly during the rainy season after the first cutting, and decreased again after the rainy season.However, the forage yield of siberian wildrye grass was dominated by the first cutting, and the most critical growing stage was the arid elongating-heading stage from late June to early July.Therefore, the conflict existed between the rapidly growing of siberian wildrye grass and soil water supply in this region.Some ways should be studied to regulate the seasonal distribution of soil water or the growing stages of forage grass. |
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