黄土丘陵区影响生物结皮退化因素的初步研究

通过植被—枯落物—生物结皮的样方调查,分析植被、枯落物及结皮自身生长状况与结皮退化的关系。结果表明:1)植被盖度和基盖度的变化对生物结皮退化影响较大,而对枯落物下结皮退化度和枯落物下结皮盖度的影响不明显,说明高等植物对植物间空地生物结皮退化的影响不明显;2)生物结皮的自身生长状况与其退化过程的关系不明显,其退化主要是受到其他因素的作用影响;3)枯落物的厚度和盖度是枯落物下结皮退化的重要影响因素,也是影响结皮退化盖度的重要因素。

This paper studied on influencing factors of soil biological crust degradation in Hilly-gullied Region of Loess Plateau.Based on investigation of vegetation,litters and biological crust,the factors of vegetation and litters as well as biological crust s growths status that related to biological crust degradation was analyzed.The results indicated that: 1) The change of vegetation coverage and basal coverage has great influence on the degradation of biological crust,but it has no significant influence on cov...