不同林下套种模式对油茶幼林根区土壤化学特性及微生物的影响  

Effects of interplanting patterns on chemical properties and microbial community in root zone soils of young Camellia oleifera forest

作　　者：郑灏[1] 杨志坚[1] 冯金玲[1] 陈世品[1] 林文俊[1] 白玉娜[1] 郑国华[1] 陈辉[1] 

机构地区：[1]福建农林大学经济林研究所,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2015年第2期147-153,共7页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：福建省科技重大专项(2013NZ0001-1);高等学校博士学科点专项科研基金(20123515110010);福建省林木种苗科技攻关四期项目(HX09007)

摘　　要：采用磷脂脂肪酸方法评估套种圆叶决明(YY1)、羽叶决明(YY2)、花生(HS)、黄豆(HD)、豇豆(JD)、绿豆(LD)和对照(CK)7种不同措施对油茶幼林根区土壤微生物群落结构的影响.结果表明:不同套种模式间土壤养分和微生物群落结构存在差异.各模式中真菌(18∶1ω9c)和细菌(16∶0、i16∶0和18∶0)均为优势种群.与CK相比,套种圆叶决明和羽叶决明模式显著提高了土壤总PLFA、细菌和真菌的含量;细菌/真菌的比例在套种圆叶决明、套种羽叶决明模式中提高,其余均低于CK.相关分析表明,土壤PLFA总量、细菌和革兰氏阳性菌等与土壤有机质、有效磷、有效氮和全氮显著相关.Phospholipids fatty acid （PLFA） analysis was employed to examine the effects of seven interplanting patterns, namely in- terplanting with Cassia rotundifolia Pens （YY1） , soybean （HD）, peanut （HS）, mungbean （LD）, cowpea （JD）, and Chamaec- nsta n/ct/tans （YY2）, and interplanting with no crop（CK）, on microbial community. The results showed that there were a greatly differences of soil nutrient and microbial community structure among different intercropping patterns. In each mode, fungus （18： 1ω9c） and bacteria （ 16： 0, i16：0 and 18： 0） were the dominant species. Compared with CK treatment, interplantlng with Cass/a l＂o- tundifolia Pens mode and Chamaecr/sta nictitans mode significantly increased the total soil PLFA, bacterial and fungal content. The ratio of bacteria/fungi increased in interplanting with Cassia rotundifolia Pets and Chamaecrista nictitans, and the rest were de- creased. Correlation analysis indicated that the total amount of soil PLFA, bacteria and Gram-positive bacteria was significantly cor- relate to soil organic, total N, available nitrogen and phosphorus.

关 键 词：油茶幼林 套种 土壤微生物群落 磷脂脂肪酸 

分 类 号：S714.3[农业科学—林学]