CAJ | 학술논문

利用盆栽模拟干旱胁迫条件，研究华南地区速生树种尾巨桉、竹柳以及石灰岩地区常见造林树种石斑木、楝叶吴茱萸、任豆苗木土壤含水量与叶水势关系，并从叶水势变化角度对5种苗木的保水能力和抗旱能力进行评价。试验结果表明：①通过拟合土壤含水量与叶水势关系得出：石斑木以乘幂方程拟合最好，R2＝0.98（ P＜0.01）；尾巨桉、任豆、竹柳和楝叶吴茱萸以对数方程拟合最好，R2＞0.92（ P＜0.01）。②石斑木和竹柳在整个干旱过程中能保持较高的叶水势，说明其保持水分的能力较强，具有较高的延迟脱水的能力；尾巨桉、楝叶吴茱萸、任豆在受到中度和重度干旱胁迫时叶水势急剧下降，保持水分的能力较弱。③在干旱胁迫条件下，3个石灰岩树种中石斑木叶水势降低较快，且在土壤含水量相同时石斑木叶水势显著高于任豆和楝叶吴茱萸，说明石斑木抗旱性强于楝叶吴茱萸和任豆；而2个速生树种以竹柳的水势降低较快，表现出较强的抗旱性能。
이용분재모의간한협박조건，연구화남지구속생수충미거안、죽류이급석회암지구상견조림수충석반목、련협오수유、임두묘목토양함수량여협수세관계，병종협수세변화각도대5충묘목적보수능력화항한능력진행평개。시험결과표명：①통과의합토양함수량여협수세관계득출：석반목이승멱방정의합최호，R2＝0.98（ P＜0.01）；미거안、임두、죽류화련협오수유이대수방정의합최호，R2＞0.92（ P＜0.01）。②석반목화죽류재정개간한과정중능보지교고적협수세，설명기보지수분적능력교강，구유교고적연지탈수적능력；미거안、련협오수유、임두재수도중도화중도간한협박시협수세급극하강，보지수분적능력교약。③재간한협박조건하，3개석회암수충중석반목협수세강저교쾌，차재토양함수량상동시석반목협수세현저고우임두화련협오수유，설명석반목항한성강우련협오수유화임두；이2개속생수충이죽류적수세강저교쾌，표현출교강적항한성능。
Five species in South China area ,two fast-growing species ( Eucalyptus urophylla ×Eucalyptus grandis and bamboo-wil-low) and three Karst area species ( Rhaphiolepis indica,Evodia glabrifolia,and Zenia insignis) were tested by pot experiment to study the relationships of soil water content and leaf water potential under drought stress , and to estimate water holding capacity and drought resistance of five kinds of seedings from the perspective of water potential changes .The results showed that:①soil water con-tent and leaf water potential were used to fit curve ,exponentiation was best for Rhaphiolepis indica ( R2 =0.98 ,P<0.01 ) ,logarith-mic was best for Eucalyptus urophylla × Eucalyptus grandis,bamboo-willow,Evodia glabrifolia,and Zenia insignis( R2 >0.92,P<0.01 ).②Rhaphiolepis indica and bamboo willow maintained a high leaf water potential ,indicating a strong ability to maintain mois-ture and to delay dehydration;leaf water of Eucalyptus urophylla ×Eucalyptus grandis,Evodia glabrifolia and Zenia insignis Sharply declined in moderate and sever drought ,its ability to maintain moisture was weak.③Three species in Karst area ( Rhaphiolepis indi-ca,Evodia glabrifolia,and Zenia insignis),leaf water potential of Rhaphiolepis indica decreased rapidly,in same soil water content, leaf water of Rhaphiolepis indica was significant higher than Zenia insignis and Evodia glabrifolia,drought resistance of Rhaphiolepis indica was higher than Zenia insignis and Evodia glabrifolia,for fast-growing species ( Eucalyptus urophylla ×Eucalyptus grandis and bamboo-willow),leaf water potential of bamboo-willow decreased rapidly than Eucalyptus urophylla ×Eucalyptus grandis,and indica-ting higher drought resistance.