幼林期杉木家系施肥效应

Effect of Fertilization on Chinese Fir Families at Young Stand Stage

[目的]为杉木人工林速生丰产技术制定施肥方案。[方法]对5年生杉木家系进行配方施肥试验,研究不同施肥量及肥种对生长的影响。[结果]不同施肥处理对家系保存率无显著影响,在4年生前,地径和树高的生长量在家系间存在显著差异,但随着林龄和郁闭度的增加,5年生时仅树高性状在家系间存在显著差异;在4年生前,不同施肥用量对杉木树高、胸径、材积长量无显著差异,而在5年生时,仅胸径性状上存在显著差异。300 g钙镁磷肥(17%)处理对1号家系树高生长有明显促进作用,树高超过家系均值95.36%;600 g钙镁磷肥(17%)处理对2号家系胸径生长有明显促进作用,胸径生长超过家系均值的122.17%。[结论]综合分析,600 g钙镁磷肥(17%)处理对杉木生长最为有利。

[Objective] The aim of this study was to formulate fertilization scheme for fast-growing and highyield technology of Chinese fir plantation. [Method] A formula fertilization experiment was conducted on 5-year-old Chinese fir families to study the effects of different fertilization rates and fertilizer species on growth.[Result] The different fertilization treatments had no significant effect on the survival rate of families.There were significant differences in the growth of ground diameter and tree height among families before 4 years of life,but with the increase of forest age and canopy density,only the tree height traits were significantly different among families at 5 years of life. There was no significant difference in height,diameter at breast height and volume length of Cunninghamia lanceolata before 4 years,but there was only significant difference in diameter at breast height at 5 years. 300 g calcium magnesium phosphate fertilizer(17%) treatment significantly promoted the growth of tree height of family 1,and the tree height exceeded the average of family by 95.36%. 600 g calcium magnesium phosphate fertilizer(17%) treatment significantly promoted the DBH growth of No.2 family,and the DBH growth exceeded 122.17% of the family average. [Conclusion] Comprehensive analysis showed that 600 g calcium magnesium phosphate fertilizer(17%) treatment was the most favorable for the growth of Cunninghamia lanceolata.