宁南黄土丘陵区不同生态恢复与重建中的土壤水分变化研究

针对宁南黄土丘陵区存在的生态脆弱、环境恶化的突出问题,对黄土丘陵区不同生态恢复过程中的土壤水分变化进行了研究。研究结果表明:在退化山地的植被恢复过程中,0￣60cm土层,土壤水分含量随恢复年限的增长而增加,在60cm土层以下,土壤含水量随着退耕年限的不断增长不断减小;对于不同恢复方式的土壤水分含量,88542水平沟>人工草地>鱼鳞坑>天然草地;对于不同植被类型的土壤水分含量,草地>灌木地>林地;对于不同地形的土壤水分含量,阴坡>半阴坡>阳坡,坡下部>坡中部>坡上部,并且随着坡度的不断增加,土壤水分含量不断减小。

A study on Variation of Soil Water during Different Ecological Restoration or Reconstruction in Loess Hilly and Gully Regions of Southern Ningxia

Variation of Soil Water during Different Ecological Restoration or Reconstruction in Loess Hilly and Gully Regions of Southern Ningxia was studied, through the surely a little observation of the typical shape land of open country. Research result shows: In the vegetation course of resuming of degraded mountainous region,0~60 cm earth layer, soil moisture content follow recovery the increase of time limit increase, below the earth layer of 60 cm, soil water content along with retreat to plough the unceasing increase of time limit reduce continuously little; For different resuming the soil moisture content, 88542 horizontal ditch > artificial grass > the hollow of fish scale > natural grass; For the soil moisture content of different vegetation type, grass land> bush land > forest land; For the soil moisture content of different topography, cloudy slope > half cloudy slope > positive slope, slope bottom > slope central section > slope top, and along with the unceasing increase of slope soil, moisture content reduce continuously little.