旅游景观园林早熟禾合理施肥试验研究

Study of tourism landscape Poa pratensis L. reasonable fertilization experiment

大庆市草坪建植4年后会出现明显的退化现象,土壤施肥可以改善早熟禾营养状况,有效延缓草坪退化进程。试验采取测土配方施肥的方法研究早熟禾生长变化规律,结果表明:试验末期施肥处理的有机质降低量少于对照,氮磷钾含量高于对照,pH值略低于对照;氮磷配合处理的分蘖密度7～10月显著高于其他处理;50%饼肥处理的叶片宽度最大,6～7月氮肥处理次之,8～10月氮磷处理次之;氮磷肥处理的叶绿素含量最高,对促进叶绿素含量增加效果最佳;氮磷配合处理生长季节内草坪盖度最高,极显著高于对照,50%饼肥氮处理次之;氮磷配合处理可以显著促进早熟禾生长,50%饼肥处理次之。分析认为,氮磷配合处理对促进早熟禾生长效果最佳,100%饼肥处理最差,发酵饼肥施用比例不宜超过50%。

The lawn will be significant degradation after planting four years in Daqing city,soil fertilization can improve the nutritional status and effectively delay the degradation process of the lawn.The test used soil testing and formula fertilization mode to study Poa pratensis L.growth variation.The results showed that：All fertilization treatments organic matter reduced amount was less than control and NPK content were higher than the control and pH values was lower than the control in final test;The treatment with nitrogen and phosphorus tiller density was significantly higher than other treatments in 7~10 months;The 50% fermented soybean cake treatment leaf width maximum and nitrogen treatment followed in 6~7 months and nitrogen and phosphorus treatment followed in 8~10 months;Nitrogen and phosphorus treatment chlorophyll content highest that promote chlorophyll content increased was best;Nitrogen and phosphorus treatment turf cover highest that significantly higher than the control and 50% fermented soybean cake treatment followed in the growing season;Nitrogen and phosphorus treatment could significantly promote the growth of Poa pratensis L.and 50% fermented soybean cake treatment followed.Comprehensive analysis that with nitrogen and phosphorus to promote the growth of Poa pratensis L.was best and 100% fermented soybean cake treatment was worst and fermented soybean cake treatment application ratio of not more than 50%.