不同经营措施对油松林枯落物持水性能的影响研究

为了评价不同经营措施对油松人工林枯落物持水能力的影响,通过带状皆伐、封禁抚育、孔状择伐、修枝抚育、引进灌木这5种措施,并以未封禁作为对照的实验方法,分别在抚育开始、抚育后2a、抚育后4a对枯落物的储量、最大含水量、自然含水量和有效拦蓄量进行了测定和评价。结果表明:(1)枯落物储量和持水性能随抚育时间的延长呈增加趋势。(2)不同经营措施下,抚育后2和4a的枯落物储量大小顺序均为:带状皆伐>封育恢复>孔状择伐>修枝抚育>引进灌木>未封禁枯落物最大含水量在抚育后1~2a内排序为:引进灌木>封育恢复>带状皆伐>孔状择伐>修枝抚育,抚育后2~4a排序为:引进灌木>带状皆伐>封育恢复>孔状择伐>修枝抚育>未封禁自然含水量在抚育后1~2a排序为:封育恢复>引进灌木>孔状择伐>带状皆伐>修枝抚育>未封禁,在抚育后2~4a表现出:引进灌木>封育恢复>孔状择伐>带状皆伐>修枝抚育>未封禁有效拦蓄量变化趋势表现为:带状皆伐>孔状择伐>引进灌木>封育恢复>修枝抚育>未封禁。

Effects of Different Management Measures on Water holding Performance of Pinus Tabulaeformis Carr. Litter

To evaluate the influence of different management measures on the water-holding capacity of Pinustabulaeformis Carr. plantation litter,the litter reserves,the maximum moisture,the natural moisture and the effective interception amount were measured and analyzed respectively at the time of tending beginning,tending after 2 years and tending after 4 years.During the process of experiment,the following five measures on Pinus tabulae formis Carr. plantation were used:clearing cutting with banding,banned tending,selective cutting with hole shape,branch pruning and introducing shrub,and with the not banned tending as a control group.The results showed that:(1)The litter reserves and moisture increased with the time.(2)Under the different management measures,the litter reserves after 2 years and 4 years followed as the sequence:clearing cutting with banding>banned tending>selective cutting with hole shape>branch pruning}introducing shrub>not banned tending;the maximum moisture of the litter after 1 to 2 years ranked as:introducing shrubs banned tending> clearing cutting with banding> selective cutting with hole shape>branch pruning,and after 2 to 4 years:introducing shrubs clearing cutting with banding> banned tending>selective cutting with hole shape>branch pruning>not banned tending;(3)The natural moisture of the litter after 1 to 2 years followed as:banned tending> introducing shrubs selective cutting with hole shape>clearing cutting with banding>branch pruning>not banned tending,and after 2 to 4 years:introducing shrub>banned tending>selective cutting with hole shape>clearing cutting with banding>branch pruning>not banned tending;(4)The effective interception amount ranked as:clearing cutting with banding>selective cutting with hole shape>introducing shrub>banned tending>branch pruning>not banned tending.