不同施肥措施对桉树优势高生长的影响

Fertilizer Response of Average Predominate Height of Eucalyptus

通过分析5种不同施肥措施(1、不施肥对照,2施 N100,3、施 P50,4、N100P50,5、N100P50K50T)对巨尾按和尾叶桉优势木平均高生长的影响的结果,得出施肥对林分优势木高生长影响的一般规律,即施肥影响效果逐年减小,造林前两年最大,至轮伐期(6—7年时,基本消退;只施 N100和不施肥效果基本相同;施 N10050K50T 复合肥和 N100P50前期效果最好,而这两种施肥对优势高的影响自始至终相差甚小。

The analysys of fertilizer response(5 fertilizer motheds:1 Ni1,2.N100,3.P50,4.N100P50,5.N1100P50K50T)of Average Predominate Height of Eucalyptus results in the general rule,the affact of the fertilizer response to Average predominate Height of Eucalyptus decrease year by year;the biggest affact time is the first two years after afforestation and nothing to rotation.The effect of N100 is the same with Nil;N100P50K50T and N100P50 are the better fertilizer methods compare to others,and the affact of the two methods are nearly the same.