CAJ | 학술논문

以赣南飞播马尾松中龄林为研究对象，分别密度组Ⅰ（900～1500株· hm－2）、密度组Ⅱ（1500～2100株· hm－2）、密度组Ⅲ（2100～2700株· hm－2）、密度组Ⅳ（2700～3300株· hm－2）设置标准地，进行林下植被层基本特征调查和土壤样品测定。结果表明：灌草层平均高及草本层平均盖度均为密度组Ⅱ最大，灌木层平均盖度随着林分密度的增加而逐渐减小；不同密度组林下植被层生物量为6．53～9．84t · hm－2，从大到小的排列次序为密度组Ⅱ＞Ⅲ＞Ⅰ＞Ⅳ，但不同密度组间差异不显著（ P＞0．05）。不同密度组间土壤饱和持水量、总孔隙度及全K质量分数差异显著（ P＜0．05），且表现为密度组Ⅱ最大，其它土壤性质指标间差异未达显著水平（ P＞0．05）。土壤质量综合指数依次为密度组Ⅱ（0．658）＞密度组Ⅲ（03．78）＞密度组Ⅰ（0．326）＞密度组Ⅳ（0．261）。因此，飞播马尾松林分密度控制在1500～2100株· hm－2，有利于林下植被层的生长发育和土壤质量的提高，促进林分的正向演替。
이공남비파마미송중령림위연구대상，분별밀도조Ⅰ（900～1500주· hm－2）、밀도조Ⅱ（1500～2100주· hm－2）、밀도조Ⅲ（2100～2700주· hm－2）、밀도조Ⅳ（2700～3300주· hm－2）설치표준지，진행림하식피층기본특정조사화토양양품측정。결과표명：관초층평균고급초본층평균개도균위밀도조Ⅱ최대，관목층평균개도수착림분밀도적증가이축점감소；불동밀도조림하식피층생물량위6．53～9．84t · hm－2，종대도소적배렬차서위밀도조Ⅱ＞Ⅲ＞Ⅰ＞Ⅳ，단불동밀도조간차이불현저（ P＞0．05）。불동밀도조간토양포화지수량、총공극도급전K질량분수차이현저（ P＜0．05），차표현위밀도조Ⅱ최대，기타토양성질지표간차이미체현저수평（ P＞0．05）。토양질량종합지수의차위밀도조Ⅱ（0．658）＞밀도조Ⅲ（03．78）＞밀도조Ⅰ（0．326）＞밀도조Ⅳ（0．261）。인차，비파마미송림분밀도공제재1500～2100주· hm－2，유리우림하식피층적생장발육화토양질량적제고，촉진림분적정향연체。
With the soil sample data of different stand density groups of Ⅰ ( 900-1 500 N · hm-2 ) , Ⅱ ( 1 500-2 100 N · hm-2),Ⅲ(2 100-2 700 N· hm-2), and Ⅳ(2 700-3 300 N· hm-2) in middle-aged aerially-seeded Pinus massoniana plantation in south of Jiangxi Province , we explored the effect of stand density on the understory vegetation and soil quality . The understory layer average height and herb layer average coverage of density group Ⅱ were the largest , and the average coverage of shrub layer was decreased with the increase of stand density .The biomass of understory vegetation layer be-tween different densities was in 6.53-9.84 t· hm-2 , with the descending order of Ⅱ,Ⅲ, Ⅰand Ⅳ, but the differences between density groups were not significant( P>0 .05) .The differences of soil saturated water holding capacity , total poros-ity and total K content of different density groups were significant (P<0.05), and the density group Ⅱ was the highest. The differences between other indicators of soil properties were not significant ( P>0.05).The descending order of soil quality comprehensive indexs was Ⅱ(0.658), Ⅲ (0.378), density groupⅠ(0.326), and density group Ⅳ (0.261). Therefore, controlling the stand density of aerially seeded Pinus massoniana plantation in 1 500-2 100 N· hm-2 would be helpful for the growth of understory vegetation layer , the soil quality , and positive stand succession .