为了确定切花菊品种‘神马’氮肥的适宜用量，本研究使用了不同的氮浓度营养液进行无土栽培。试验中发现：在氮用量在16．Omg／株～900．Omg／株的范围内出现了氮的缺素症和过剩症。氮用量16．0mg／株时植株表现出叶色浅，生长缓慢，花期较早；氮用量为900．Omg／株时植株根部出现坏死，生长缓慢，花期推迟。结果表明：切花菊施肥不可过量，否则不仅花期推后，而且花的品质也受到影响。通过研究发现：氮用量为98．Omg／株一240．Omg／株为宜，可以为切花菊施肥管理提供依据。%In order to determine the best level of N given to soil during the growing of Chrysanthemum morifolium normally,experiment was carried out on vermiculite with irrigation liquid with different N concen- tration. Both the special deficiency and the superfluous has been discovered in the N concentration rang (16.0 - 900. 0mg/plant) used for this experiment. It is suggested that the concentration of N given to soil during the growing of chrysanthemum morifolium is better not to surpass a rang, otherwise, efflorescence is delayed and quality of flower is not good. This experiment has determined the best level of N given to soil is 98.0 - 240.0mg N/plant during the growing of normally.
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