放线菌对棉花幼苗生长及抗旱能力的影响  

Effect of Actinomyces Seed Coating Agent on Cotton Growth and Drought Resistance

作　　者：陈秦[1] 薛泉宏[1] 申光辉[2] 薛磊[2] 段春梅[1] 王玲娜[2] 赵娟[2] 毛宁[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]西北农林科技大学生命科学学院,陕西杨凌712100

出　　处：《西北农业学报》2010年第8期84-89,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金："十一五"国家科技支撑计划项目(2006BAD05B07)

摘　　要：采用种衣剂包衣接种及盆栽生物试验研究了放线菌对棉种发芽、棉苗抗旱能力、光合能力及生长能力的影响。结果表明:①单用放线菌剂做种衣剂,棉种的发芽势与发芽率分别提高了11.75%与7.41%;单用保水剂做种衣剂,棉种的发芽势、发芽率分别降低了17.65%与14.81%;二者混合做种衣剂,对棉种的发芽势和发芽率影响不大。②单用放线菌作种衣剂,棉苗在第10天和第20天时的萎蔫率分别较对照降低了43.48%和92.86%,其降低幅度随着棉苗苗龄增加而增强;单用保水剂作种衣剂,棉苗的萎蔫率在第10天和第20天时较对照分别降低了56.52%和28.57%,其降低幅度随着棉苗苗龄增加而减弱。③放线菌对棉花幼苗真叶面积、叶片绿色度和棉花幼苗生物量的菌剂效应分别约为保水剂效应的8倍、2倍和4倍,保水剂对棉苗根系生长表现出抑制作用。供试放线菌制剂作为棉花种衣剂能显著促进棉苗生长并提高抗旱能力,与保水剂以适宜比例混合时,也表现出良好的效果。菌剂效果优于保水剂。The study was to research the effect of germination,drought-resistance,photosynthesis and biomass on cotton of inoculating with actinomycetes,using seed coating agent and potting experimental.The results showed as follows：（1）Inoculating with actinomycetes,germination energy and germination percentage increased 11.75% and 7.41% separately,and single water absorbent made that decreased 17.65% and 14.81% separately.（2）Inoculating with actinomycetes,the wilting percentage of cotton decreased 43.48% and 92.86% separately in 10 d and 20 d,the effect increased with cotton growth;water absorbent t decreased he wilting percentage of cotton 56.52% and 28.57% separately in 10 d and 20 d,the effect decreased with cotton growth.（3）Actinomycetes increased leaf area,SPAD value and biomass 8 times,2 times and 4times than water absorbent separately.Actinomycetes can increased cotton biomass and drought resistances significantly,and still showed the same results when mixed with water absorbent;Actinomycetes was better than water absorbent.

关 键 词：棉花 放线菌 保水剂 种衣剂 连作障碍 

分 类 号：S435.621[农业科学—农业昆虫与害虫防治]