综合措施对杉木幼林生长的影响

Effect of Integrated Measures on Growth of Young Growths in Cunninghamia lanceolata

在广西资源县进行杉木苗木质量、施肥方法、造林时间和抚育方式的田间试验，试验采用Ｌ１６（４５）正交试验法。试验地总面积０．２ｈｍ２，共设４个水平，分１６个小区实施。结果表明：苗木质量、施肥方法和抚育方式均对幼林的高、径生长产生显著影响，造林当年苗木质量的影响最大，其次是施肥方式；造林后第３年施肥因素的影响极显著，苗木质量的影响显著；造林第１０年抚育方式的影响占主导地位，其次是施肥因素，但施肥因素对幼林胸径生长的影响仍然显著，且施放基肥（磷肥）显得尤为重要。

A field experiment of seedlings quality,fertilization, trans planting and nursing on the young growths of Cunninghamia lanceolata was made using L16(45) orthogonal matrix in Ziyuan county of northern Guangxi. The total field area of experiment is 02 hm2 with 16 subareas .The results showed that the seedling quality, fertilization and nursing significantly affected the growth of high and diameter ,and the dominant factor is seedling quality in current year of planting, subsequently fertilizing. On the third year after planting, fertilizer effect is very significant, and the seedling quality is also significant.On the tenth year after planting, nursing is dominant ,fertilization is down to the second places, but still significantly affect the growth of breast height diameter, in which base fertilizer(phosphate) is specially important.