生态环境学报
生態環境學報
생태배경학보
ECOLOGY AND ENVIRONMENT
2014年
11期
1739-1743
,共5页
退化植被%恢复植被%土壤微生物生物量%紫色土%衡阳
退化植被%恢複植被%土壤微生物生物量%紫色土%衡暘
퇴화식피%회복식피%토양미생물생물량%자색토%형양
degenerated vegetation%recovered vegetation%soil microbial biomass%purple soils%Hengyang
土壤微生物量常被作为植物所需营养元素的转化因子和资源库，是表明土壤发育状况和生化强度的一项主要指标。为了研究衡阳紫色土丘陵坡地退化植被与恢复植被的土壤微生物生物量特征。以退化植物群落（狗尾草群落）（Ass. Setaria viridis）和恢复植群落(枫香+苦楝-剌槐+牡荆-野菊花+夏枯草群落）（ Ass. Liquidamdar formosana+Melia azedarach-Robinia pseudoacacia+Vitex negundo var. cannabifoloa-Chrysanthemum indicum+Prunella vulgaris）作为研究对象，通过调查取样和实验分析相结合的方法，分析2种植物群落的0~10、10~20、20~30、30~40和40~50 cm土层的土壤微生物生物量的变化特征。结果表明：（1）随着土层深度增加，土壤微生物生物量、土壤细菌和丝状微生物生物量均显著降低，其大小顺序为：0~10 cm土层>10~20 cm土层>20~30 cm土层>30~40 cm土层>40~50 cm土层（P<0.05）；（2）恢复植被各土层中的土壤微生物生物量均显著高于退化植被（P<0.05）；（3）土壤微生物生物量与土壤含水量、土壤容重、土壤有机质和土壤微生物生物量存在显著或极显著的相关关系（P<0.05或P<0.01）。研究表明：恢复植被有利于土壤微生物生物量的提高和土壤质量的改善。
土壤微生物量常被作為植物所需營養元素的轉化因子和資源庫，是錶明土壤髮育狀況和生化彊度的一項主要指標。為瞭研究衡暘紫色土丘陵坡地退化植被與恢複植被的土壤微生物生物量特徵。以退化植物群落（狗尾草群落）（Ass. Setaria viridis）和恢複植群落(楓香+苦楝-剌槐+牡荊-野菊花+夏枯草群落）（ Ass. Liquidamdar formosana+Melia azedarach-Robinia pseudoacacia+Vitex negundo var. cannabifoloa-Chrysanthemum indicum+Prunella vulgaris）作為研究對象，通過調查取樣和實驗分析相結閤的方法，分析2種植物群落的0~10、10~20、20~30、30~40和40~50 cm土層的土壤微生物生物量的變化特徵。結果錶明：（1）隨著土層深度增加，土壤微生物生物量、土壤細菌和絲狀微生物生物量均顯著降低，其大小順序為：0~10 cm土層>10~20 cm土層>20~30 cm土層>30~40 cm土層>40~50 cm土層（P<0.05）；（2）恢複植被各土層中的土壤微生物生物量均顯著高于退化植被（P<0.05）；（3）土壤微生物生物量與土壤含水量、土壤容重、土壤有機質和土壤微生物生物量存在顯著或極顯著的相關關繫（P<0.05或P<0.01）。研究錶明：恢複植被有利于土壤微生物生物量的提高和土壤質量的改善。
토양미생물량상피작위식물소수영양원소적전화인자화자원고，시표명토양발육상황화생화강도적일항주요지표。위료연구형양자색토구릉파지퇴화식피여회복식피적토양미생물생물량특정。이퇴화식물군락（구미초군락）（Ass. Setaria viridis）화회복식군락(풍향+고련-랄괴+모형-야국화+하고초군락）（ Ass. Liquidamdar formosana+Melia azedarach-Robinia pseudoacacia+Vitex negundo var. cannabifoloa-Chrysanthemum indicum+Prunella vulgaris）작위연구대상，통과조사취양화실험분석상결합적방법，분석2충식물군락적0~10、10~20、20~30、30~40화40~50 cm토층적토양미생물생물량적변화특정。결과표명：（1）수착토층심도증가，토양미생물생물량、토양세균화사상미생물생물량균현저강저，기대소순서위：0~10 cm토층>10~20 cm토층>20~30 cm토층>30~40 cm토층>40~50 cm토층（P<0.05）；（2）회복식피각토층중적토양미생물생물량균현저고우퇴화식피（P<0.05）；（3）토양미생물생물량여토양함수량、토양용중、토양유궤질화토양미생물생물량존재현저혹겁현저적상관관계（P<0.05혹P<0.01）。연구표명：회복식피유리우토양미생물생물량적제고화토양질량적개선。
Soil microbial biomass was not only usually looked as transforming factors and pool of resource of nutritional elements needed by plants, but also a main index of development status and biochemical capacity of soils. In order to study the properties of soil microbial biomass in degenerated vegetation and recovered vegetation on sloping-land with purple soils in Hengyang of Hunan Province, China. Taking degenerated plant community (Ass. Setaria viridis) and recovered plant community (Ass. Liquidamdar formosana+Melia azedarach-Robinia pseudoacacia+Vitex negundo var. cannabifoloa-Chrysanthemum indicum+Prunella vulgaris) in the region as test objects, soil samples from depths of 0~10 cm, 10~20 cm, 20~30 cm, 30~40 cm and 40~50 cm were collected to study the properties of soil microbial biomass through the combination of sample investigation and experimental analysis. The results showed that:(1) With the increase of soil depth, the total soil microbial biomass, bacteria and filamentous microbial biomass were followed the order as 0~10 cm soil layer>10~20 cm soil layer>20~30 cm soil layer>30~40 cm soil layer>40~50 cm soil layer(P<0.05); (2) The soil microbial biomass in recovered vegetation was significantly higher than that in degenerated vegetation(P<0.05);(3) The soil microbial biomass was significantly and very significantly correlated with SWC (Soil water content), SBD (Soil bulk density), SOM (Soil organic matter) and SMB (Soil microbial biomass) (P<0.05 or P<0.01). All the results indicated that recovered vegetation was beneficial to the increase of soil microbial biomass and improvement of soil quality.
