不同类型樟子松人工固沙林土壤质量研究

Soil Quality in the Different Types of Pinus sylvestris var.Mongolica Man-made Sand-fixation Forest

从土壤微生物、土壤持水性、土壤物理、化学性质方面探讨了不同类型樟子松人工固沙林土壤质量状况,得出针阔混交林比针叶纯林土壤质量高的结论.松杨混交林、松枫混交林林下微生物细菌、真茵数量分别比樟子松纯林高1～3倍,表层枯枝落叶量比纯林高8.54%～10.02%,0～20 cm最大持水量提高了4%～5%.不同林分类型间土壤差异不大,混交林有降低趋势;养分状况表层有较明显差异,但深层土壤中除速效N之外,其他各项养分含量差异不明显。

Soil quality of the different types of Pinus sylvestris man-made sand-fixation forests are studied by soil microbe,soil holding water,soil physical and chemical property.Soil quality of mixed coniferous and broadleaf stand is higher than that of pure coniferous forest.The quantity of bacteria,fungi is 1～3 times higher than that of mixed Pinus and Poplar forest and mixed Pinus and Pterocarya forest,and surface layer litter is 8.54%～10.02% higher,maximum moisture capacity of 0～20cm soil increase 4%～5% than that of the pure Pinus sylvestris forest.Difference of soil volume weight isn't obvious among forest types,but that of the mixed forest has reduction trend.Soil nutrient condition in surface soil has obvious difference,but it hasn't obvious difference except available K in deeper soil.All results indicated that the effect of forest on soil improvement is a long-term course.