生态环境学报
生態環境學報
생태배경학보
ECOLOGY AND ENVIRONMENT
2015年
1期
41-48
,共8页
付美云%杨宁%杨满元%林仲桂
付美雲%楊寧%楊滿元%林仲桂
부미운%양저%양만원%림중계
土壤微生物%土壤养分%耦合关系%恢复阶段%紫色土%衡阳
土壤微生物%土壤養分%耦閤關繫%恢複階段%紫色土%衡暘
토양미생물%토양양분%우합관계%회복계단%자색토%형양
soil microbe%soil nutrient%coupling relation%re-vegetation%purple soils%Hengyang
采用空间代替时间序列的方法,对衡阳紫色土丘陵坡地不同恢复阶段土壤微生物特征与养分的耦合关系进行研究。结果表明,1)不同恢复阶段土壤养分存在明显差异,从裸荒地阶段(Ⅰ)、草本阶段(Ⅱ)、灌木阶段(Ⅲ)到乔木阶段(Ⅳ),土壤含水量、土壤有机质、全氮、碱解氮和速效磷显著增加(P<0.05),全磷、pH 值逐渐减小(P>0.05),全钾和速效钾的差异变化不大。2)不同恢复阶段微生物总数显著增加(P<0.05),其中细菌数量显著增加(P<0.05),真菌数量的大小顺序为草本阶段(Ⅱ)>裸荒地阶段(Ⅰ)>灌木阶段(Ⅲ)>乔木阶段(Ⅳ)(P<0.05);放线菌数量的大小顺序为草本阶段(Ⅱ)>乔木阶段(Ⅳ)>裸荒地阶段(Ⅰ)>灌木阶段(Ⅲ)(P<0.05)。裸荒地阶段(Ⅰ),细菌数量与放线菌数量呈显著正相关(P<0.05),草本阶段(Ⅱ),放线菌数量与真菌数量呈极显著正相关(P<0.01),灌木阶段(Ⅲ)和乔木阶段(Ⅳ),细菌数量、真菌数量和与放线菌数量之间呈极显著正相关关系(P<0.01)。3)相关分析表明,不同恢复阶段微生物量碳、微生物量氮和微生物量磷之间的相关性性达显著或极显著水平(P<0.05或P<0.01),土壤微生物量与土壤养分的关系密切(P<0.05或P<0.01),而微生物数量与土壤养分的相关性较弱(P>0.05)。4)典型相关分析表明,不同恢复阶段土壤微生物属性和土壤养分的耦合关系不同。裸荒地阶段(Ⅰ),土壤含水量、土壤有机质、全氮和全磷主要影响微生物量碳、微生物量氮和微生物量磷(P<0.01)。草本阶段(Ⅱ),土壤有机质、全磷和 pH 值起较大作用,主要影响微生物量碳、细菌、真菌(P<0.01)。灌木阶段(Ⅲ),土壤有机质、全磷和pH主要影响微生物量碳、微生物量氮和真菌(P<0.01)。乔木阶段(Ⅳ),全磷、碱解氮和pH值主要影响微生物量碳、微生物量氮和细菌(P<0.01)。研究结果对于构建衡阳紫色土丘陵坡地植被恢复技术体系具有理论与实践意义。
採用空間代替時間序列的方法,對衡暘紫色土丘陵坡地不同恢複階段土壤微生物特徵與養分的耦閤關繫進行研究。結果錶明,1)不同恢複階段土壤養分存在明顯差異,從裸荒地階段(Ⅰ)、草本階段(Ⅱ)、灌木階段(Ⅲ)到喬木階段(Ⅳ),土壤含水量、土壤有機質、全氮、堿解氮和速效燐顯著增加(P<0.05),全燐、pH 值逐漸減小(P>0.05),全鉀和速效鉀的差異變化不大。2)不同恢複階段微生物總數顯著增加(P<0.05),其中細菌數量顯著增加(P<0.05),真菌數量的大小順序為草本階段(Ⅱ)>裸荒地階段(Ⅰ)>灌木階段(Ⅲ)>喬木階段(Ⅳ)(P<0.05);放線菌數量的大小順序為草本階段(Ⅱ)>喬木階段(Ⅳ)>裸荒地階段(Ⅰ)>灌木階段(Ⅲ)(P<0.05)。裸荒地階段(Ⅰ),細菌數量與放線菌數量呈顯著正相關(P<0.05),草本階段(Ⅱ),放線菌數量與真菌數量呈極顯著正相關(P<0.01),灌木階段(Ⅲ)和喬木階段(Ⅳ),細菌數量、真菌數量和與放線菌數量之間呈極顯著正相關關繫(P<0.01)。3)相關分析錶明,不同恢複階段微生物量碳、微生物量氮和微生物量燐之間的相關性性達顯著或極顯著水平(P<0.05或P<0.01),土壤微生物量與土壤養分的關繫密切(P<0.05或P<0.01),而微生物數量與土壤養分的相關性較弱(P>0.05)。4)典型相關分析錶明,不同恢複階段土壤微生物屬性和土壤養分的耦閤關繫不同。裸荒地階段(Ⅰ),土壤含水量、土壤有機質、全氮和全燐主要影響微生物量碳、微生物量氮和微生物量燐(P<0.01)。草本階段(Ⅱ),土壤有機質、全燐和 pH 值起較大作用,主要影響微生物量碳、細菌、真菌(P<0.01)。灌木階段(Ⅲ),土壤有機質、全燐和pH主要影響微生物量碳、微生物量氮和真菌(P<0.01)。喬木階段(Ⅳ),全燐、堿解氮和pH值主要影響微生物量碳、微生物量氮和細菌(P<0.01)。研究結果對于構建衡暘紫色土丘陵坡地植被恢複技術體繫具有理論與實踐意義。
채용공간대체시간서렬적방법,대형양자색토구릉파지불동회복계단토양미생물특정여양분적우합관계진행연구。결과표명,1)불동회복계단토양양분존재명현차이,종라황지계단(Ⅰ)、초본계단(Ⅱ)、관목계단(Ⅲ)도교목계단(Ⅳ),토양함수량、토양유궤질、전담、감해담화속효린현저증가(P<0.05),전린、pH 치축점감소(P>0.05),전갑화속효갑적차이변화불대。2)불동회복계단미생물총수현저증가(P<0.05),기중세균수량현저증가(P<0.05),진균수량적대소순서위초본계단(Ⅱ)>라황지계단(Ⅰ)>관목계단(Ⅲ)>교목계단(Ⅳ)(P<0.05);방선균수량적대소순서위초본계단(Ⅱ)>교목계단(Ⅳ)>라황지계단(Ⅰ)>관목계단(Ⅲ)(P<0.05)。라황지계단(Ⅰ),세균수량여방선균수량정현저정상관(P<0.05),초본계단(Ⅱ),방선균수량여진균수량정겁현저정상관(P<0.01),관목계단(Ⅲ)화교목계단(Ⅳ),세균수량、진균수량화여방선균수량지간정겁현저정상관관계(P<0.01)。3)상관분석표명,불동회복계단미생물량탄、미생물량담화미생물량린지간적상관성성체현저혹겁현저수평(P<0.05혹P<0.01),토양미생물량여토양양분적관계밀절(P<0.05혹P<0.01),이미생물수량여토양양분적상관성교약(P>0.05)。4)전형상관분석표명,불동회복계단토양미생물속성화토양양분적우합관계불동。라황지계단(Ⅰ),토양함수량、토양유궤질、전담화전린주요영향미생물량탄、미생물량담화미생물량린(P<0.01)。초본계단(Ⅱ),토양유궤질、전린화 pH 치기교대작용,주요영향미생물량탄、세균、진균(P<0.01)。관목계단(Ⅲ),토양유궤질、전린화pH주요영향미생물량탄、미생물량담화진균(P<0.01)。교목계단(Ⅳ),전린、감해담화pH치주요영향미생물량탄、미생물량담화세균(P<0.01)。연구결과대우구건형양자색토구릉파지식피회복기술체계구유이론여실천의의。
The purpose of the paper was to study the coupling relationship between soil microbe with soil nutrients in different re-vegetation stages on sloping-land with purple soils in Hengyang of Hunan Province, South-central China. We took soils of 0~20 cm depth in typical areas in bare land stage(Ⅰ), herbaceous community stage(Ⅰ), shrubby community stage(Ⅰ) and arborea community stage(Ⅳ) as our test objects by using the method of the space for time. The results showed that:1)There were obvious differences in soil nutrients in different re-vegetation stages, from Ⅰ, Ⅱ, Ⅲ to Ⅳ, SWC(Soil water content), SOM(Soil organic matter), TN(Total nitrogen), AN(Alkali-hydrolyzed nitrogen) and AP(Available phosphorus) increased significantly(P<0.05), TP(Total phosphorus), pH value decreased slighly(P>0.05), and there were no significant differences in TK(Total potassium) and AK(Available potassium);2)The number of soil microbes increased significantly(P<0.05), with a significant increase in the number of bacteria, the number of fungi were followed the order asⅡ>Ⅰ>Ⅲ>Ⅳ(P<0.05), the number of actiomycetes were followed the order as Ⅱ>Ⅳ>Ⅰ>Ⅲ(P<0.05). Ⅰ, the number of bacteria significantly positively correlated with the number of actiomycetes(P<0.05),Ⅱ, the number of actiomycetes very significantly positively correlated with the number of fungi(P<0.01),Ⅲand Ⅳ, there existed very significantly positively correlation between the number of bacteria, fungi and actiomycetes(P<0.01);3)Correlation analysis showed that there existed significantly or very significantly correlation among MBC(Microbial biomass carbon), MBN(Microbial biomass nitrogen) and MBP(Microbial biomass phosphorus)(P<0.05 or P<0.01), the relationship between soil microbial factors and soil nutrients differed in different re-vegetation stages, among which the soil microbial biomass was closely with soil nutrients(P<0.05 or P<0.01), while the amount of soil microbial population was weakly related with soil nutrients in the four re-vegetation stages(P>0.05);4)Canonical correlation analysis showed that the coupling relationships between soil microbe and soil nutrient factors were different in different re-vegetation stages.Ⅰ, SWC, SOM, TN and TP had a greater effect on MBC, MBN and MBP(P<0.01).Ⅱ, SOM, TP and pH played a greater role and mainly affected on MBC, bacteria and fungi(P<0.01).Ⅲ, SOM, TP and pH values mainly influenced MBC, MBN and fungi (P<0.01).Ⅳ, TP, AN and pH values proudly affected on MBC, MBN and bacteria(P<0.01). These would have a theoretical and practical significance for building re-vegetation technique system on sloping-land with purple soils in Hengyang of Hunan Province, South-central China.