求翻译：4.1土壤pH 值都随土层深度增加而减少，腐殖质、淀积层变化一致，均是柴桦兴安落叶松林最小，溪旁兴安落叶松林最大，除溪旁兴安落叶松林PH在中性范围，其它都显酸性, pH值在3.98~7.15之间。是什么意思？

4.1 Soil pH values ​​decreased with increasing soil depth, humus layer deposition consistent with the change, are the smallest Chai Hua Larix gmelinii, Larix gmelinii largest banks of streams, in addition to the banks of streams in Larix gmelinii PH neutral range, other are acidic, pH values ​​betwe

4.1 soil pH value, along with soil depth increases, and a decrease humus, deposition level changes, both consistent Chai Hua 541300 is the smallest, larchwood brook Cherith larchwood 541300 brook Cherith, except in the largest PH larchwood 541300 in the scope, the other is marked in acidic, pH value

4.1 soil pH value all increases along with the soil layer depth reduces, the humus, the illuvial horizon change is consistent, is the firewood birch Xingan fallen leaf pinery is smallest, nearby the brook the Xingan fallen leaf pinery is biggest, except the brook nearby Xingan fallen leaf pinery PH

4.1 soil with soil depth increase and decrease the pH value, humus, deposition layer changes in line are minimum fruticosa pall of Larix gmelinii forest and Larix gmelinii forest next to the river's largest, with the exception of Dahurian larch forest in neutral PH range next to the River, others ar

4.1 soil with soil depth increase and decrease the pH value, humus, deposition layer changes in line are minimum fruticosa pall of Larix gmelinii forest and Larix gmelinii forest next to the river's largest, with the exception of Dahurian larch forest in neutral PH range next to the River, others ar