内蒙古正蓝旗降水量对草原生产力的影响

发布时间：2018-04-16 02:24

  本文选题：降水量 + 草原生产力　； 参考：《西北农林科技大学学报(自然科学版)》2017年04期

【摘要】：【目的】分析内蒙古正蓝旗降水量对草原植被生产力的影响,为草原的合理规划、利用以及草原生态保护提供科学参考。【方法】基于2000-2013年正蓝旗年降水量、生长季降水量(4-8月)和不同类型草原(低地草甸、温性典型草原和温性草甸草原)生产力数据,采用回归分析的方法探讨该地区2000-2013年降水量对草原生产力的影响。【结果】1)年降水量和生长季降水量均与草原生产力呈正相关关系,且生长季降水量分别与草甸草原、典型草原和低地草甸生产力构建的回归模型相关性(R分别为0.564,0.826和0.845),略高于年降水量与上述3种类型草原生产力构建的模型(R分别为0.569,0.820和0.826),但是二者差异不显著。2)年降水量和生长季降水量对不同类型草原生产力的影响程度均不同,二者与不同类型草原生产力的相关系数均为低地草甸典型草原草甸草原。【结论】草原生产力的年际变化受降水量年际波动的影响,且年降水量和生长季降水量对草原生产力的影响程度并没有明显差异,但二者对典型草原和低地草甸生产力的影响均明显大于草甸草原。
[Abstract]:[objective] to analyze the effect of precipitation in Zhenglan Banner of Inner Mongolia on grassland vegetation productivity, and to provide a scientific reference for the rational planning, utilization and ecological protection of grassland. [methods] based on the annual precipitation of Zhenglan Banner from 2000 to 2013,Data on productivity of different types of grasslands (lowland meadow, temperate typical steppe and temperate meadow grassland),The effects of precipitation on grassland productivity from 2000 to 2013 in this area were studied by regression analysis. [results] 1) Annual precipitation and growth season precipitation were positively correlated with grassland productivity, and the precipitation in growing season was correlated with meadow grassland, respectively.The correlation R of regression model constructed by typical grassland and lowland meadow productivity was 0.5640.826 and 0.845m, respectively, which was slightly higher than that of annual precipitation and the model constructed by the above three types of grassland productivity (0.5690.8020 and 0.826g, respectively), but the difference between the two models was not significant.The effects of annual precipitation and growing season precipitation on the productivity of different types of steppe were different.The correlation coefficients between the two factors and the productivity of different types of steppe are both lowland meadow steppe. [conclusion] the interannual variation of grassland productivity is affected by the interannual fluctuation of precipitation.The effect of annual precipitation and growing season precipitation on grassland productivity was not significantly different, but the effects of annual precipitation and growing season precipitation on the productivity of typical grassland and lowland meadow were obviously greater than those of meadow grassland.
【作者单位】： 中国科学院内蒙古草业研究中心;内蒙古自治区农牧业科学院;
【基金】：内蒙古科技厅应用技术研究与开发项目“内蒙古草原自然资源资产负债表编制方式研究与示范”
【分类号】：S812
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本文编号：1756898