柳杉育苗技术优化方案的研究

Study on the Optimization of the Technical Scheme for Chinese Cryptomeria Seedlings Growing

本文应用正交试验设计方法,选用育苗密度、播种期、尿素、钙镁磷、氯化钾等五个主要影响柳杉育苗质量的因素进行了研究。通过分析,综合确定柳杉的育苗优化方案为:每公顷育苗密度75万株,施尿素750kg,施钙镁磷600kg,施氯化钾225kg,播种期为1月17日左右。并分析了不同组合的经济效益。研究结果对指导柳杉育苗管理具有重要的意义。

Seedings growing trials undertaken in Fuding County Nursery, Fujian Province, showed that the remarkable difference of economic results and seedling quality of Chinese cryptomeria occurred in the distinct technical scheme which is composed of some primary factors influencing seedling qual-ity. The optimization scheme proved to be t sowing begins on 7th , January with seedling growing density being 750 thousand plants per hectare ; Urea of 750 kg/hm2, calcium magnesium phosphate of 600kg/hm2 , and potassium chloride of 225kg/hm2 are applied. The diameter of the seedlings above ground is 0.47cm, seedling height 44.3cm. And the net profit registers an increase of 93% as compared with the conventional seedling growing scheme.