施磷对越冬期高羊茅生长、养分吸收及抗寒性的影响  

Effect of Phosphorus Application Amount on the Growth,Nutrient Absorption,and Cold-resistance of Tall Fescue(Festuca arundinacea Schreb.) in Winter

作　　者：鲁剑巍[1] 邹娟[1] 周世利[2] 蒋细旺[2] 丛红霞[1] 徐艳丽[1] 

机构地区：[1]华中农业大学资源与环境学院,湖北武汉430070 [2]江汉大学医学与生命科学技术学院,湖北武汉430056

出　　处：《草地学报》2008年第5期436-441,共6页Acta Agrestia Sinica

基　　金：武汉市重点攻关项目(20032003029);国际植物营养研究所(IPNI)国际合作项目(Hubei-200601)

摘　　要：为给华中地区冷季型草坪草养分护理提供依据,在武汉布置试验研究磷肥对冷季型草坪草高羊茅（Festuca arundinaces Schreb.）越冬期生长、养分吸收和抗寒性的影响。结果表明：在氮钾肥基础上增施磷肥（P2O5 5～25 g/m^2）显著促进草坪草生长和品质改善,与对照相比,各施磷处理越冬期分蘖数、株高、叶面积、地上部生物量、叶片叶绿素含量（SPAD）均有显著地提高;显著提高草坪草地上部氮、磷、钾含量,促进养分吸收;叶片脯氨酸（Pro）和丙二醛（MDA）含量随磷肥施用而显著下降,明显降低低温对高羊茅的伤害程度;磷肥的适宜用量范围为10～15 g/m^2,过低或过高用量磷肥均会对草坪草生长、质量及抗寒性产生不良影响。Tall rescue （Festuca arundinaces Schreb. ） is a very popular and important turfgrass in city gardening in the Yangtze River region. However, as a high quality cold-season grass, tall rescue sometimes maintains poor growth and bad quality in winter caused by poor nutrient management. The effect of phosphorus （P） application amount on the growth, nutrients absorption, and cold-resistance of tall rescue at winter stage was studied in Wuhan, Hubei Province. The results show that P fertilization （P2O5 5-25 g ·m^2） significantly increased the growth and turf quality of tall fescue. Compared with CK （zero P）, P application significantly increased the tillering, height, leaf area, aboveground biomass, leaf chlorophyll content, N, P and K content in aboveground biomass, and nutrient absorption of tall fescue. Proline （Pro） and malondialdehyde （MDA） content at winter stage declined significantly along with P application amount, and leaf chill-injury level decreased. The results also indicate the appropriate application amount of P2O5 ranged from 10 to 15 g · m^2 , lower and higher dosages of P would lead to negative effect on the growth, cold-resistance, and turf quality of tall rescue.

关 键 词：高羊茅 磷肥用量 抗寒性 养分吸收 

分 类 号：S143.2[农业科学—肥料学] S688.4[农业科学—农业基础科学]