CAJ | 학술논문

采用钻土芯与内生长相结合的研究方法,将马尾松占其混交林的组成比例分成5种类型(0~20%、21%~40%、41%~60%、61%~80%和81%~100%),设置15块20 m×20 m的标准样地,系统比较了不同比例马尾松混交林(马尾松占林分胸高断面积的比例)细根生物量的分布状况、细根生长量及季节动态变化.结果表明:(1)马尾松不同的混交比例对细根生物量有较大影响,不同混交比例林分的细根生物量的大小依次为,马尾松混交比例41%~60%﹥0~20%﹥21%~40%﹥81%~100%﹥61%~80%.(2)5种比例混交林分的细根生物量垂直分布规律均很明显,随土层增加细根生物量趋于减少,且大部分细根集中于土壤表层0~10 cm的范围内.这与该地区的土层较浅以及树种根系的分布特性(深根、浅根树种)密切相关.(3)5种马尾松混交林细根生物量季节动态均呈单峰变化,均在6、7月份达到峰值,在1月份达到最低值,41%~60%林分年生物量净增值比其他4种混交林分要高.(4)5种混交林分的细根年生长量随季节变化明显,最大值出现在6~8月份,最小值出现在12~3月份.各个混交林分细根年生长量大小依次为41%~60%﹥61%~80%﹥21%~40%﹥81%~100%﹥0~20%.
채용찬토심여내생장상결합적연구방법,장마미송점기혼교림적조성비례분성5충류형(0~20%、21%~40%、41%~60%、61%~80%화81%~100%),설치15괴20 m×20 m적표준양지,계통비교료불동비례마미송혼교림(마미송점림분흉고단면적적비례)세근생물량적분포상황、세근생장량급계절동태변화.결과표명:(1)마미송불동적혼교비례대세근생물량유교대영향,불동혼교비례림분적세근생물량적대소의차위,마미송혼교비례41%~60%﹥0~20%﹥21%~40%﹥81%~100%﹥61%~80%.(2)5충비례혼교림분적세근생물량수직분포규률균흔명현,수토층증가세근생물량추우감소,차대부분세근집중우토양표층0~10 cm적범위내.저여해지구적토층교천이급수충근계적분포특성(심근、천근수충)밀절상관.(3)5충마미송혼교림세근생물량계절동태균정단봉변화,균재6、7월빈체도봉치,재1월빈체도최저치,41%~60%림분년생물량정증치비기타4충혼교림분요고.(4)5충혼교림분적세근년생장량수계절변화명현,최대치출현재6~8월빈,최소치출현재12~3월빈.각개혼교림분세근년생장량대소의차위41%~60%﹥61%~80%﹥21%~40%﹥81%~100%﹥0~20%.
In this article, 15 standard sample plots of 20 m×20 m were set in Dashan village, Zongyang county of Southern Anhui to analyze the effects of tree species composition on distribution, growth and seasonal dynamics of fine root biomass in 5 kinds of 20-year-old masson pine and broad-leaved mixed forests with combi-nation of soil drilling and inner growth methods. The results are as follows. (1) Differences in species composition have a great effect on fine root biomass;the order for fine root biomass in 5 kinds of stands is 41%-60%﹥0-20%﹥21%-40%﹥81%-100%﹥61%-80%. (2) Fine root biomass increase with rise of soil layer for all sampling for-est stands of masson pine and broad-leaved mixed woods. The vertical distribution might be closely related to soil depth and root characteristics in Dashan area. (3) Seasonal dynamics of five kinds of masson pine and broad-leaved mixed forest present a unimodal curve, and the maximum occurred in June and July, while the min-imum in January. As to net value of biomass, the highest is in 41%-60%masson pine mixed woods. (4) The larg-est growth occurred from June to August, and the smallest from December to next March. The annual production of fine root in all stands were ranked by 41%-60%﹥61%-80%﹥21%-40%﹥81%-100%﹥0-20%.