施钾对沟叶结缕草生长和营养成分的影响

Effect of Potassium Fertilizer on Growth and Nutritional Component of Zoysia matrella

沟叶结缕草施钾试验，采用每株施钾量为０．２５ｇ、０．５ｇ、１ｇ和２ｇ４种，另不施钾为对照。施钾水平的提高促进了河叶结缕草的生长，当施钾量为２ｇ／株时，处理株的株高、分蘖数、地上部鲜重和根鲜重分别为对照的１．２倍、１．９倍、２．６倍和２．５倍，与对照间的差异均达极显著水平。施钾还使沟叶结缕草地上部分钾、锰含量和全株总糖量增加，但地上部分氮、钙含量和蛋白质含量减少。

Rooted Zoysia matrella cuttings were grown in pots containing a sand and flower residue mixture of pH 5.2.active potassium 142.5×10-6.The effects of K(0,0.25,0.5,1 or 2g/plant,as KCl)on plant growth and nutritional component were studied.Plant growth was promoted singnificantly in high K level(K 2g/plant),plant height,tiller,shoot FW and root Fw were increased respectively 20%.90%.160%and 150% as against control (K 0g/plant).In all apllied K treatments,K、Mn content in shoot as well as total sugar content in shoot and root were increased, but N、Ca and protein content in shoot were reduced.