2种肥料对早熟禾生长及叶绿素含量的影响

Effects of Two Kinds of Fertilizer on Growth and Chlorophyll Content Change of Poa annua

[目的]研究氮肥和磷钾肥对早熟禾生长影响的差异。[方法]以城市环境下正常生长的早熟禾为试材,研究了硝酸铵、磷钾配施对生长季节内早熟禾叶片加长和加宽生长以及干物质积累、叶绿素含量的影响。[结果]施肥可以促进早熟禾叶片的加长生长,2种肥料间差异不显著;6～8月硝酸铵可以在0.05水平显著降低早熟禾叶片宽度,磷钾肥影响效果不明显;施肥可以在0.05水平显著促进早熟禾植株的干物质积累,硝酸铵促进作用优于磷钾肥;施肥可以改变早熟禾叶片含水量,不同月份表现不同;硝酸铵对促进早熟禾叶绿素含量增加的效果优于磷钾肥。[结论]施肥可以促进早熟禾生长和观赏价值的提高,硝酸铵优于磷钾肥。

[Objective] The research aimed to study of the effects of N and P,K fertilizer on Poa annua growth.[Method] Poa annua growing normally in the urban environment was used as the material.The changes of leaves length and width,dry matter accumulation,chlorophyll content on N,P and K fertilization in growing season were studied.[Result] Fertilization could promote the growth of Poa annua leaves longer.But there were no significant differences between two kinds of fertilizers.Ammonium nitrate could significantly reduce the width of Poa annua leaves from June to August,and the effects of P and K weren＇t obvious.Fertilization could significantly promote dry matter accumulation of Poa annua.Ammonium nitrate was superior to P and K.Fertilization could change leaf water content of Poa annua.The content of chlorophyll change of ammonium nitrate was better than that of P and K.[Conclusion] Fertilization could promote the growth of Poa annua and improve the ornamental value.Ammonium nitrate was superior to potassium dihydrogen phosphate.