平衡施肥对高羊茅生长的影响

Effect of N,P,K Fertilizer on Tall Fescue Growth and Cold-resistance

利用盆栽土培试验研究了氮磷钾肥对冷季型草坪草高羊茅生长和叶绿素含量的影响。结果表明,氮磷钾配合施用能有效促进草坪草生长、叶绿素合成及提高抗寒性。NPK处理(施足各种养分)的叶片数、叶长及株高分别是不施氮处理的1.23、1.73和1.68倍,是不施磷处理的1.96、2.25和2.04倍;播种后100 d时NPK处理SPAD值分别比PK和NK处理高出2.53和3.14倍。试验结果还表明,磷肥对草坪草生长影响最大,氮肥次之,钾肥对草坪草生长影响不大。结果表明,氮磷钾肥合理施用能有效改善越冬期草坪质量。

A pot experiment in greenhouse was conducted to study influence of N , P and K fertilization on growth and chlorophyll content （SPAD）. The results showed that N , P and K fertilization combined application could increase turf growth and chlorophyll synthesis. The leaf number, leaf length and plant height of NPK（balanced fertilization） treatment were 1.23,1.73 and 1.68 times compared with without N treatment, and were 1.96, 2.25 and 2.04 times compared with without P treatment. The SPAD value of NPK treatment after seeding 100 days increased by 2.53 and 3.14 times compared with without N and P treatment, respectively. P fertilizer had the greatest influence on turf growth and then N fertilizer and K showed the little response on tuff growth. The results indicated that N, P and K fertilizer combined reasonably application could improve turf quality at winter stage.