本文關鍵詞：AM真菌對紫花苜蓿細根生長及其生物量動態(tài)特征的影響，由筆耕文化傳播整理發(fā)布。

AM真菌對紫花苜蓿細根生長及其生物量動態(tài)特征的影響

Effect of the Arbuscular Mycorrhizal Fungi on the Dynamic Characteristics of Fine Root Growth and Biomass of Alfalfa

[1] [2] [3] [4] [5] [6]

REN Aitian ,NARKES Waly ,LU Weihua ,YANG Jiejing ,MA Chunhui ,LIU Hongling （College of Animal Science ＆ Technology, Shihezi University, Shihezi, Xinjiang 832003, China；2 Teache

[1]石河子大學動物科技學院,新疆石河子832003; [2]石河子大學師范學院,新疆石河子832003

文章摘要：細根對植物功能的發(fā)揮和土壤碳庫及全球碳循環(huán)具有重要意義.采用容器法和微根管法于2013年6～10月整個生長季內對紫花苜蓿的細根生物量、生產以及周轉規(guī)律進行研究.結果表明：（1）紫花苜蓿活細根現存生物量平均值以接種摩西球囊霉（Gm）處理最高（12.46 g·m-2）,未接種對照最低（7.31 g·m-2）,并且活細根現存量在9月中旬達到峰值;死細根現存生物量呈先增加后降低再增加的變化趨勢,在整個生長過程中未接種處理高于接種處理,接種根內球囊霉（Gi）處理死細根現存平均生物量（3.11 g·m-2）又較接種組其他處理低.（2）苜蓿植株細根生長量以接種幼套球囊霉（Ge）處理最大（0.045 mm·cm-2·d-1）,接種Gm處理和未接種對照最低（均為0.027 mm·cm-2·d-1）;而未接菌植株細根死亡量（0.044 mm·cm-2·d-1）顯著高于接種植株,接種組又以Gi處理最低（0.021 mm· cm-2·d-1）.（3）紫花苜蓿在生長季節(jié)內細根生產和死亡的高峰分別出現在8月底和10月份,低谷出現在9月底到10月中旬和6月底到8月;接種地表球囊霉（Gv）后細根現存量和年生長量顯著高于對照和接種其他菌種處理,細根的周轉以對照組最大,而接種Gv和Gm處理較低.研究發(fā)現,通過接種叢植菌根真菌可以提高苜蓿細根生物量,降低細根的死亡,增加細根壽命.

Abstr：Fine roots played a significant role in exerting the plant functions, soil carbon pool and global car- bon recycling. We observed biomass, production and turnover of the fine roots of alfalfa by container meth- od and minirhizotron in the whole growing season that was ranged from June to October in 2013. The result showed that： （1）The inoculated Glomus mosseae （Gm） had the highest mean biomass （12.46 g· m-2） ,the control group had the lowest mean biomass （7.31 g · m 2）. The live fine root biomass peaked in mid Sep- tember,hut the dead showed a tendency of increasing first and then declining, and then increasing. In the whole growing process, the dead fine root biomass of non-inoculated was higher than that with inoculated treatment,and inoculated Glomus intraradices （Gi）showed the lowest biomass of dead fine root （3.11 g ·m-2）. （2）Inoculated Glomus etunicatum （Ge） had the highest fine root production （0. 045 mm · cm - 1· d-1） ,Gm and control group had the lowest （0. 027 mm· cm-2 · d-1 ）. However,fine root mortality of non- inoculated treatment （0. 044 mm · cm-2 · d-1） was significantly higher than that with inoculated treat- ments,and Gi had the lowest fine root mortality （0. 021 mm · cm-2 · d-1）. （3）Production and mortality peaks of fine roots appeared at the end of August and October,but trough came in at the end of September to mid October and the end of June to August during the growing reason. The average fine root length and annual length production of Glomus versiforme （Gv） was significantly higher than that of control and other inoculated treatments. Control treatment had the highest fine root turnover,Gv and Om were the lowest. Inoculating with arbuscular mycorrhizal fungi c

文章關鍵詞：

Keyword：:arbuseular mycorrhizal fungi alfalfa biomass fine root minirhizotron turnover

課題項目：兵團博士資金專項（2012BB017）;國家牧草產業(yè)技術體系項目（CARS-35）;石河子大學高層次人才引進項目（RCZX201022）;石河子大學科技服務項目（4004103）

  本文關鍵詞：AM真菌對紫花苜蓿細根生長及其生物量動態(tài)特征的影響，，由筆耕文化傳播整理發(fā)布。