森林凋落物对土壤酸化缓冲作用的初步研究

阔叶树木荷凋落物的灰分元素含量以及分解速率大大高于针叶树杉木凋落物。相比之下,木荷凋落物具有较高的缓冲酸化的潜在能力。覆盖木荷凋落物的土壤,其下渗液盐基含量和PH值与对照相比显著较高,而土壤本身的盐基饱和度和有机质含量也显著较高,土壤酸度和Al/Ca显著较低,即太荷凋落物对土壤酸化有较高的缓冲能力,而杉木凋落物则不然。

Preliminary Studies on the Buffering Effects of Forest Litter on Soil Acidification

The ash element content and decomposition rate of the litter of S. Superba were found to be much higher than those of the litter of C, lanceolata. Subsequently, it is inferred that the former possesses a higher potential to buffer acidification of the soil compared with the latter. When the soil was covered with litter of S. superba, the base cation content and pH-value of leachate down from the litter and soil were evidently higher than the coatrol; the basesaturation percentage and pH-value of the soil itself were also markedly higher, and the acidity and Al/Ca of the soil were far lower than the control. That is, the buffering ability of litter of S. superba to soil acidification is very strong, while tie litter of C. lanceolata, is not.