不同磷肥用量对高羊茅生长及养分吸收的影响  

Effects of P fertilization rates on growth and nutrients absorption in tall fescue

作　　者：邹娟[1] 鲁剑巍[1] 周世力[2] 袁跃斌[1] 赵慧星[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学院,湖北武汉430056

出　　处：《草业科学》2008年第6期112-117,共6页Pratacultural Science

基　　金：武汉市重点攻关项目(20032003029);加拿大钾磷肥研究所(PPI/PPIC)基金项目

摘　　要：在武汉地区研究了不同磷肥用量对冷季型草坪草高羊茅Festuca arundinaces生长状况、草屑积累量、氮（N）磷（P）钾（K）养分含量及积累量的影响。结果表明：在施用N、K肥（N15g／m^2，K2O 12g／m^2）基础上，P肥能明显促进草坪草分蘖并提高成坪后叶绿素含量，施P（P2O5）2．5～20．0g／m^2处理的分蘖数是不施P对照的2．81～4．32倍，叶片SPAD值比对照高15．8～18．2。草屑积累量和高羊茅总干物量随P肥用量的增加而增加；施P10．0g／m^2范围内，地下部干物质量也随施P增加而增加，继续提高P用量有下降的趋势。高羊茅舍N量因施P而明显下降，地上部P、K含量随P肥用量增加而显著提高，而地下部P、K含量各处理差异不显著。P肥用量10．0g／m^2时高羊茅N积累量达到最高值（7．51g／m^2），是对照的2．71倍；随着P用量的增加P、K养分积累量持续上升，且P积累量与P用量呈显著正相关。综合考虑草坪生长质量及肥料利用效率，认为在试验地力条件下新植高羊茅的P肥（P2O5）用量以5～10g／m^2范围为宜。An experiment was conducted in Central China Wuhan region to evaluate the effect of different phosphorous fertilization rates （P2O5,0, 2.5, 5.0, 10.0, 20.0 g/m^2） on growth, clipping biomass, nutrient contents, and accumulation in tall rescue. The results indicated that based on N （N, 15 g/m^2） and K （K2O, 12 g/m^2） application, P treatment promoted tillering ability and increased tiller by 2.81--4.32 times, increased leaf Chlorophyll content by 15.8--18.2 times as indicated by SPAD value. Leaf clippings and plant blomass improved significantly with the increasing of P fertilization rates, while roots biomass decreased with P application rate over 10.0 g/m^2. N content in plant decreased significantly with P application, P and K content of. the above ground increased with the increasing P application rate, while no significant difference was observed for under ground. Plant N accumulation achieved its peak （N,7.51 g/m^2） at the rate of 10.0 g/m^2, 2.71 times of the control. P and K accumulation improved as the increasing P application rates, and P accumulation positively correlated to P fertilizer rate. Considering turf quality and fertilizer use efficiency, it was recommend that the appropriate P application rate for newly established tall rescue was 5--10 g/m^2.

关 键 词：高羊茅 磷肥 草坪生长 养分吸收 推荐施肥 

分 类 号：S688.4[农业科学—观赏园艺]