磷钾肥和多效唑对高羊茅越夏性的影响研究 Ⅱ.高温对高羊茅叶片中膜系统和抗坏血酸含量的影响  

The effects of different phosphorus、potassium and plant growth retardant application rates on the heat-resistance of Festuca arundinacea Ⅱ.High temperature's effects on membrane system and AsA in leaves of Festuca arundinacea

作　　者：王志勇[1] 廖丽[1] 王幸斌[1] 邹少丰[2] 余高镜[2] 孙小霞[2] 林文雄[2] 

机构地区：[1]景德镇高等专科学校生化系,江西景德镇333000 [2]福建农林大学应用生态研究所,福建福州350002

出　　处：《草业科学》2006年第8期89-92,共4页Pratacultural Science

基　　金：福建省重大科技专项(NZ2004-01-4)

摘　　要：研究采用了裂裂区设计,以耐热较强的冷季型草坪草高羊茅Festuca arundineceacv.Huntdog 5为试验材料,比较了不同磷钾肥施量和多效唑喷施浓度对高羊茅在夏季条件下的逆境生理的影响。研究表明:丙二醛(MDA)含量的变化、细胞膜透性(PMP)大小以及抗坏血酸(AsA)含量的变化均达到了极显著水平(P<0.01),MDA的含量和PMP大小与AsA含量呈负相关。以活性氧代谢指标与细胞膜透性为评判耐性大小的依据,耐热性最强的组合为A2B3C2(磷:60 kg/hm2,钾:140 kg/hm2,多效唑:250 mg/L),此处理组合能有效地延长高羊茅绿期,保证其安全越夏。A cool-season turfgrass （Festuca arundinecea cv. Huntdog 5）, which has heat-tolerance and high quality,was introduced to study heat-resistance in the pot experiment. The split-split plot design with three factors and three levels was employed to study the effect of different treatments with different phosphorus,potassium,plant growth retardant （PP333） application rates on the stress physiology of tall rescue. The result showed that the contents of malondialdehyde （MDA） and ascorbic acid （AsA）were correlated significantly with the changes of permeability of plasma membrane（PMP） ,negative correlation was focused on the content of AsA,PMP and content of MDA. Based on the index of active oxygen and PMP,the best treatment for heat tolerance is A2B3C2,as is expected to extend the green time of F. arundinacea and overaestivate rationally in the transitional region.

关 键 词：高羊茅 磷肥 钾肥 多效唑 越夏 抗坏血酸 膜系统 

分 类 号：S688.4[农业科学—观赏园艺]