以2.5 g·L^-1、5.0 g·L^-1、10.0 g·L^-1三个浓度复合肥对采穗圃进行施肥试验，研究不同浓度复合肥对松材线虫病抗性马尾松采穗圃的产穗和穗条扦插的影响。结果表明，与空白对照相比，施用复合肥使萌条数量，穗条扦插的生根率、不定根数量、最长不定根、总根长和侧根数增加。不同浓度复合肥对性状的影响不同。复合肥2.5 g·L^-1最有利于萌条数量增加，较对照增加106%，差异达显著水平；5.0 g·L^-1最有利于提高不定根数、总根长和侧根数，较对照分别提高100.0%、189.1%和186.4%，其中总根长差异达极显著水平，侧根数达显著水平；10.0 g·L^-1最有利于提高生根率和最长不定根长度，较对照分别上升23.2%和134.7%，其中最长不定根差异达极显著水平。综合评价10项萌条和生根性状，复合肥10.0 g·L^-1综合目标值最高，是三个浓度中最佳施肥浓度。

In order to study the effects of different concentrations of compound fertilizer on shoots and cuttings of pine wood nematode resistant Pinus massoniana nursery, three concentrations (2.5 g·L^-1, 5.0 g·L^-1 and 10.0 g·L^-1) of compound fertilizer were used to fertilize the picking nursery, and shoots were collected for cutting experiment. Results showed that compared with control, the application of compound fertilizer increased the number of sprouting shoots, rooting rate, the number of adventitious roots, the length of the longest adventitious root, total root length and the number of lateral roots. Different concentrations of compound fertilizer had different effects on the traits mentioned above. 2.5 g·L^-1 compound fertilizer increased the number of sprouts most significantly, an increase of 106% compared to the blank control, the difference reached a significant level (P<0.05); 5.0 g·L^-1 was the most conducive concentration to increasing the number of adventitious roots, total root length and the number of lateral roots, which were respectively higher than those of the control 100.0%, 189.1% and 186.4%, and the increase in total root length reached a extremely significant level(P<0.01), and the number of lateral roots reached a significant level; 10.0 g·L^-1 improved the rooting rate and the longest adventitious root length mostly, which were 23.2% and 134.7% higher than those of the control, respectively, and the increase of the longest adventitious root reached a extremely significant level. Comprehensive evaluation of 10 traits of shoots and their cuttings, the comprehensive target value of 10.0 g·L^-1 was the highest, which made it the best fertilization concentration among the three concentrations.