省力化育林方式对红松人工林土壤的影响

为了研究各种省力化育林方式对林地土壤的影响,以辽宁东部山区人工红松(Pinus koraiensis Sieb)幼林为对象,采取单层遮阳网覆盖(Ⅰ型),双层遮阳网覆盖(Ⅱ型),黑色地膜覆盖(Ⅲ型),白色地膜覆盖(Ⅳ型)4种省力化育林措施,研究地面覆盖对土壤温度、湿度、容重、孔隙度等物理性质和土壤微生物生物量碳的影响。结果表明:省力化育林措施对造林地土壤具有显著的调节温度和保水作用,对幼树生长具有显著的辅助作用,对土壤容重和孔隙度的影响不显著。调节土壤温度效果表现为Ⅱ型>Ⅲ型>Ⅰ型>Ⅳ型>对照区;保水效果表现为Ⅱ型>Ⅲ型>Ⅰ型>Ⅳ型>对照区;土壤容重表现为对照区>Ⅰ型>Ⅳ型>Ⅱ型>Ⅲ型;土壤总孔隙度表现为Ⅳ型>Ⅲ型>Ⅱ型>对照区>Ⅰ型;土壤微生物生物量碳表现为Ⅱ型>Ⅲ型>Ⅰ型>Ⅳ型>对照区;红松幼树生长量表现为Ⅱ型>Ⅲ型>Ⅰ型>Ⅳ型>对照区。

Labor-saving afforestation effects on soil of Pinus koraiensis plantation

In order to study the various labor-saving afforestation mode for the influence of soil, choosing artificial Korean pine ( Pinus koraiensis Sieb) seedling in the mountainous area of Eastern Liaoning Province as the object, taking single-layer sunshade net cover ( typeⅠ) , double-layer sunshade net cover ( type Ⅱ) , black plastic film cover ( type Ⅲ) , and white plastic film cover ( type Ⅳ) labor-saving afforestation measures, researching the surface cover effects on soil temperature, humidity, bulk density, porosity physical properties and soil microbial biomass carbon. Experimental results show that the effort of labor-saving afforestation measures has a significant role in regulating the temperature and water retention on soil, a significant supporting role on sapling growth and no significant effect on soil bulk density and porosity. The effect of regulating soil temperature shown that: typeⅡ>type Ⅲ>typeⅠ>type Ⅳ>check plot;water retention effect shown that:typeⅡ>typeⅢ>typeⅠ>typeⅣ>check plot;soil bulk density shown that:check plot>typeⅠ>type Ⅳ>type Ⅱ>type Ⅲ; soil total porosity shown that: type Ⅳ>type Ⅲ>type Ⅱ>check plot>typeⅠ;soil microbial biomass carbon shown that:typeⅡ>typeⅢ>typeⅠ>typeⅣ>check plot. The seedling of Pinus koraiensis as different conditions shown that: type Ⅱ>type Ⅲ>typeⅠ>type Ⅳ>check plot.