磷肥用量对高羊茅生长的影响  

Effect of Phosphorus Fertilizer Application Rates on the Growth of Tall Fescue

作　　者：周世力[1] 

机构地区：[1]江汉大学医学与生命科学学院,湖北武汉430056

出　　处：《安徽农业科学》2007年第14期4247-4248,共2页Journal of Anhui Agricultural Sciences

基　　金：武汉市重点攻关项目(20032003029)

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(F.arundinaces Schreb.)生长状况和草屑积累量的影响。结果表明:在施用氮、钾肥(氮肥N15 g/m2,氧化钾12 g/m2)基础上,磷肥能明显促进草坪草分蘖并提高成坪后叶绿素含量,施磷(P2O5)2.5～20.0 g/m2处理的分蘖数是不施磷对照的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质积累随磷肥用量的增加而增加;施磷2.5～10.0 g/m2范围内,地下部干物重也随施磷的增加而增加,继续提高磷肥用量有下降的趋势。在试验地力条件下新植高羊茅的磷肥(P2O5)用量以5～10 g/m2范围为宜。An experiment was conducted in Wuhan region to evaluate the effect of different phosphorus fertilizer application rates （0, 2.5, 5.0, 10.0, 20.0 g P2O5/m^2） on the growth and clipping biomass weight of tall fescue. Result indicated that on the basis of applying N （N, 15 g/m^2） and 1（ （K2O, 12 g/m^2）, P could increase tiller ability significantly by 2.81-4.32 times compared with control group. Leaf SPAD increased by 15.8 - 18.2. Leaf clippings and plant biomass weight improved significantly with the increase of P application rate. The root biomass increased with P application rate in 2.5-10.0 g P2O5/m^2 but decreazed. When P fertilizer application over 10.0 g P2O5/m^2. It was concluded that appropriate P application rate for new plated tall fescue was 5 -10 g P2O5/m^2 according to this experiment.

关 键 词：高羊茅 磷肥 草坪生长 推荐施肥 

分 类 号：S14[农业科学—肥料学]