基质与控释肥配比对大丽花穴盘苗的影响

Effects of Medium and Controlled-Release Fertilizers Ratio on Plug-Seedling of Dahlia

以大丽花及花卉专用包膜控释肥为试材,研究了包膜控释肥以及基质与肥料配比对大丽花穴盘苗生长发育的影响。结果表明:采用合适的包膜控释肥施用量和适宜的基质与肥料配比对大丽花穴盘苗生长具有显著的促进作用。采用珍珠岩与蛭石按体积比1∶1配成的基质,当基质与控释期为4个月的包膜控释肥的配比(重量比)为3∶1(处理M3F1)时,大丽花出苗成活率最高,苗期的叶绿素含量、叶面积也显著高于其它处理。从施肥后基质浸出液在苗期pH、电导率以及速效磷和速效钾含量的变化来看,处理M3F1均处于花卉苗生长的较适宜范围。

Dahlia flowers and coated controlled-release fertilizers of flowers were used as test materials, the effects of medium and controlled-release fertilizers ratio on plug-seedling and growth of Dahlia were studied. The results showed that application of controlled-release fertilizers at proper application rate and proper medium and controlled- release fertilizers ratio could accelerate the growth and development of the Dahlia plug-seedling. Using perlite and vermiculite at volume ratio 1 ： 1 as medium, the germination rate of Dahlia seeds, chlorophyl content and leaf area were highest with medium and controlled-release fertilizers weight ratio of 3：1 among five ratios and the CK treatments. The pH,EC of medium extraction solution, available P and available K contents of the medium were all in the befitting range for the dahlia seedling growth with the M3F1 treatment of medium and controlled-release fertilizers weight ratio of 3：1. Therefore, medium and controlled-release fertilizers weight ratio of 3：1 was the best treatment for plug-seedling and growth of dahlia and the controlled-release fertilizers played a very important role on the plug-seedling of Dahlia in medium.