摘要
选取70个马尾松(Pinus massoniana)初级种子园半同胞家系为试验材料,结合反复干旱胁迫试验和大田试验,测定苗木萎蔫度和死亡率,离体针叶失水率,大田实验保存率,利用隶属函数法初步评价筛选出抗旱性较强的家系。结果表明:干旱胁迫下各家系苗木死亡率与萎蔫度存在极显著正相关性,评价结果具有较好的一致性;各家系苗木反复干旱胁迫死亡率变异系数为0.317,大于萎蔫度和离体针叶失水率变异系数,离散程度高,同时能体现苗木复水后的恢复能力,该评价指标具有更好的代表性和分辨能力。综合评价认为,在70个马尾松家系中,N-68号和N-28号家系苗木具有较强的抗旱性。
Taking 70 half-sib family of Pinus massoniana in primary seed orchard as the experimental material, combined with repeated drought stress test and field test, the seedling wilting degree, mortality, water loss ratein vitro , survival rate of field experiment were determined, the families with strong drought resistance were screened out with membership function. The results showed that under drought stress, there was a significant positive correlation between mortality and wilting degree of seedlings, and the evaluation results were consistent. The variation coefficient of mortality was 0.317. The variation coefficient of mortality was bigger than that of leaf water loss rate and wilting degree. The dispersion degree was high and could reflect the recovery capacity of seedlings after re-watering. The evaluation index had better representation and resolution.The comprehensive evaluation showed that N-68 and N-28 families had strong drought resistance in 70 families ofPinus massoniana .
作者
唐生森
黄艳飞
段萍果
贲园
杨章旗
TANG Sheng-sen;HUANG Yan-fei;DUAN Ping-guo;BI Yuan;YANG Zhang-qi(Guangxi Forestry Research Institute, Nanning 530002, China;Guangxi State Yachang Forest Farm, Baise 533209, China)
出处
《广西林业科学》
2017年第1期8-12,共5页
Guangxi Forestry Science
基金
八桂学者专项(2011A015)
广西科技项目(AD16380010)
广西林业项目(桂林科字[2016]第1号)
关键词
马尾松
家系
苗期
干旱胁迫
大田试验
Pinus massoniana
family
seedling
drought stress
field experiment
