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三江源区高寒草原土壤湿度变化特征及与气候因子的关系

郭连云

郭连云. 三江源区高寒草原土壤湿度变化特征及与气候因子的关系[J]. 草业科学, 2018, 12(1): 46-53. DOI: 10.11829/j.issn.1001-0629.2017-0153
引用本文: 郭连云. 三江源区高寒草原土壤湿度变化特征及与气候因子的关系[J]. 草业科学, 2018, 12(1): 46-53. DOI: 10.11829/j.issn.1001-0629.2017-0153
Lian-yun Guo. Alpine grassland soil moisture variation characteristics and its relationship with climate factors in Three River Source[J]. Pratacultural Science, 2018, 12(1): 46-53. DOI: 10.11829/j.issn.1001-0629.2017-0153
Citation: Lian-yun Guo. Alpine grassland soil moisture variation characteristics and its relationship with climate factors in Three River Source[J]. Pratacultural Science, 2018, 12(1): 46-53. DOI: 10.11829/j.issn.1001-0629.2017-0153

三江源区高寒草原土壤湿度变化特征及与气候因子的关系

摘要: 利用青海省三江源区兴海县牧业气象站1999-2016年高寒草原土壤湿度、牧草生育期资料,分析了高寒草原土壤湿度的年、季变化特征以及牧草生长季不同生育期土壤湿度的变化特征及与气候因子的关系。结果表明:高寒草原0-10、10-20、20-30、30-40和40-50 cm土壤湿度均随年际延长呈增加趋势,春季除40-50 cm土层外,其他各层土壤湿度均随年际延长呈显著增加趋势(P<0.05)。高寒草原牧草生长季的土壤相对湿度随年际延长呈显著上升趋势(P<0.05),且与生长季降水量之间呈极显著正相关关系(P<0.01)。随着气候变化,牧草抽穗、开花、成熟和枯黄期的土壤相对湿度随年际延长呈显著增加趋势(P<0.05)。牧草抽穗期、枯黄和全生育期的土壤湿度与气温呈显著负相关关系(P<0.05)。高寒草原牧草生长季土壤湿度的增加有利于草地植被生长。

 

English

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  • 收稿日期:  2017-03-29
  • 发布日期:  2018-01-19

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