CAJ | 학술논문

研究了青海湖鸟岛地区不同土壤水分梯度下个体与群落水平株高，根长和地上、地下生物量的分配。旨在：（1）在小尺度上调查不同土壤水分梯度对草地高、根长和地上、地下生物量分配的影响；（2）在个体和群落水平上检验同速生长理论；（3）为青海湖周边地区地下生物量估计提供数据支持，并讨论环境因素对地下生物量与地上生物量比值（R/S）的影响。结果表明：个体水平上株高、根长、地上生物量、地下生物量都随土壤含水量的增加而降低；群落水平上地上生物量随土壤含水量的增加而增加，而地下生物量随土壤含水量的增加而降低。青海湖流域鸟岛地区个体水平上根长、株高比值的变化范围为0．3～6．0，均值和中值分别为1．6和1．3；个体水平地下生物量与地上生物量的比值也有较大的变化范围（0．4～11．3），均值和中值分别为2．5和1．5；群落水平地上生物量变化范围为221．59～352．77 g·m-2，地下生物量变化范围为741．98～1182．20 g·m-2，地下、地上生物量比值的变化范围为1．4～7．1，均值和中值分别为3．0和1．9。土壤水分在个体和群落水平上都影响到了植物株高、根长以及生物量的分配。基本表现为：个体水平上株高、根长、地上生物量、地下生物量都随土壤含水量的增加而降低；群落水平上地上生物量随土壤含水量的增加而增加，而地下生物量随土壤含水量的增加而降低。该区域草地生物量分配规律在个体和群落水平上都不支持等速生长假说。
연구료청해호조도지구불동토양수분제도하개체여군낙수평주고，근장화지상、지하생물량적분배。지재：（1）재소척도상조사불동토양수분제도대초지고、근장화지상、지하생물량분배적영향；（2）재개체화군낙수평상검험동속생장이론；（3）위청해호주변지구지하생물량고계제공수거지지，병토론배경인소대지하생물량여지상생물량비치（R/S）적영향。결과표명：개체수평상주고、근장、지상생물량、지하생물량도수토양함수량적증가이강저；군낙수평상지상생물량수토양함수량적증가이증가，이지하생물량수토양함수량적증가이강저。청해호류역조도지구개체수평상근장、주고비치적변화범위위0．3～6．0，균치화중치분별위1．6화1．3；개체수평지하생물량여지상생물량적비치야유교대적변화범위（0．4～11．3），균치화중치분별위2．5화1．5；군낙수평지상생물량변화범위위221．59～352．77 g·m-2，지하생물량변화범위위741．98～1182．20 g·m-2，지하、지상생물량비치적변화범위위1．4～7．1，균치화중치분별위3．0화1．9。토양수분재개체화군낙수평상도영향도료식물주고、근장이급생물량적분배。기본표현위：개체수평상주고、근장、지상생물량、지하생물량도수토양함수량적증가이강저；군낙수평상지상생물량수토양함수량적증가이증가，이지하생물량수토양함수량적증가이강저。해구역초지생물량분배규률재개체화군낙수평상도불지지등속생장가설。
In this paper ,we have investigated the height ,root length from the individual and community level and the allocation of biomass above and below ground under different soil water gradient of the Bird Island area in Qinghai Lake .In order to :(1 ) investigate the effects of different soil water gradient to the grassland height ,root length ,biomass above and below ground by small scale ;(2 ) inspect the isospeed growth theory from the individual and community level ;(3 ) provide data support to estimate the biomass belowground for the areas around Qinghai Lake and discuss the impact of environmental factor to R/S .The results showed that :From the individual level ,the height ,root length and biomass above and below ground total were decreased with the increase of soil water content . From the community level , the biomass above ground were increased with the increase of soil water content ;but the biomass below ground was decreased with the increase of soil water content .From individual level ,the ratio between root length and height was 0 .3 to 6 .0 , the mean and median values was 1 .6 and 1 .3 ,respectively ;and the ratio between the biomass above and below ground was 0 .4 to 11 .3 ,the median and mean values was 2 .5 and 1 .5 ,respectively ,From the community level ,the change range of the biomass above ground was 221 .59 to 352 .77 g·m-2 ,the change range of the biomass bellow ground was 741 .98 to 1182 .20 g·m-2 ;the ratio between the biomass above and bellow ground was 1 .4 to 7 .1 ,the median and mean values was 3 .0 and 1 .9 ,respectively .The soil water content has affected the height ,root length and allocation of the biomass whether the individual or community level . This basically expressed as :From the individual level , the height ,root length and biomass above and below ground ,total were decreased with the increase of soil water content . From the community level , the biomass above ground was increased with the increase of soil water content ;but the biomass below ground was decreased with the increase of soil water content .In this area ,the biomass distribution rule of the grassland don’t support the hypothesis of isospeed growth whether individual or community level .