枯落物输入改变对森林生态系统土壤理化性质的影响

枯落物输入改变是影响森林生态系统土壤理化性质的一个重要因素，探究其对土壤理化性质的影响对了解和保护森林生态系统的稳定性至关重要。为探究森林生态系统土壤理化性质对枯落物输入改变的响应，对国内外已发表的研究论文中筛选出712组有效数据通过Meta分析，从枯落物输入改变、气候、海拔、林分类型、处理年限等因素揭示枯落物输入对土壤理化性质的影响程度。研究结果表明：枯落物添加使土壤pH降低2.22%;土壤含水量、有机碳、全氮、铵态氮分别提高3.99%、15.9%、9.82%和16.52%;枯落物去除使土壤含水量、pH、有机碳、全氮、C/N、铵态氮分别降低8.16%、4.02%、6.47%、5.09%、10.55%和8.86%。枯落物输入改变对土壤理化性质的影响还受到气候、海拔、林分类型、处理年限等因素的调控。在枯落物输入改变条件下，气候、海拔、林分类型、处理年限等因素对土壤含水量、有机碳、全氮、铵态氮均有显著的促进作用；海拔对土壤pH产生了显著的促进作用，而林分类型对土壤pH产生了抑制作用。同时得出枯落物输入改变条件下，年均温是土壤pH的主要调控因子，年均降水量是土壤含水量的主要调控因子；海拔是土...

Effects of altered litter inputs on soil physicochemical properties in forest ecosystems

The impact of altered litter inputs on soil physicochemical properties in forest ecosystems is an important factor in understanding and protecting the stability of forest ecosystems. To investigate the response of soil physicochemical properties to altered litter inputs in forest ecosystems, 712 sets of valid data were selected from published research papers at home and abroad and analysed by Meta-analysis to reveal the extent of the effect of litter inputs on soil physicochemical properties in terms of altered litter inputs, climate, altitude, stand type and treatment years. The results of the study showed that the addition of litter reduced soil pH by 2.22%; increased soil water content, organic carbon, total nitrogen and ammonium nitrogen by 3.99%, 15.9%, 9.82% and 16.52% respectively; and reduced soil water content, pH, organic carbon, total nitrogen, C/N and ammonium nitrogen by 8.16%, 4.02%, 6.47%, 5.09%, 10.55% and 8.86% respectively as a result of litter removal, 10.55% and 8.86%. The effect of altered litter inputs on soil physicochemical properties was also modulated by climate, altitude, stand type and treatment age. Climate, altitude, stand type and treatment age all contributed significantly to soil water content, organic carbon, total nitrogen and ammonium nitrogen, while altitude contributed significantly to soil pH, while stand type inhibited soil pH under altered litter input conditions. It was also concluded that mean annual temperature was the main regulator of soil pH, mean annual precipitation was the main regulator of soil water content, and elevation was the main regulator of soil organic carbon, total nitrogen and ammonium nitrogen under altered litter input conditions. Soil water content, pH, organic carbon, total nitrogen and ammonium nitrogen all changed significantly after the change in litter input, and the extent to which the change in litter input affected soil physicochemical properties was not only regulated by the change in litter input, but also influenced by climate, altitude, stand type and the number of years of treatment. The results of the study have theoretical implications for an in-depth understanding of the drivers of differential response of soil physicochemical properties to litter inputs.