论文部分内容阅读
以武威民勤扎子沟(WMZ)、武威民勤小坝口(WMX)、张掖山丹(ZYS)、张掖临泽(ZYL)、酒泉金塔(JQJ)及酒泉肃州(JQS)6个种源红砂幼苗为材料,利用压力-容积分析法研究了6个种源红砂幼苗的ΨP、ΨA、RWC、Ψ_s~(sat)、Ψ_s~(tlp)、Ψ_s~(sat)-Ψ_s~(tlp)、ROWC~(tlp)、RWC~(tlp)、AWC、ε~(max)等主要水分参数,并应用模糊数学隶属函数法对6个种源红砂幼苗的综合抗旱能力进行了评判。结果表明:ΨP、ΨA、RWC、Ψssat、Ψstlp、Ψssat-Ψstlp及εmax值均存在显著的种源差异(P<0.05);随种源原地从东向西,Ψ_P、Ψ_A、Ψ_s~(sat)、Ψ_s~(tlp)、及Ψ_s~(sat)-Ψ_s~(tlp)的值呈降低趋势,RWC和ε~(max)呈增大趋势;RWC和εmax均与经度、年降水量分别呈负相关或显著负相关,除ROWC~(tlp)外,其它各参数均与经度、年降水量呈正相关或显著正相关关系;6个种源红砂幼苗综合抗旱能力表现为JQS>JQJ>ZYL>ZYS>WMX>WMZ。因此,JQS和JQJ的红砂幼苗可作为红砂造林的优良种源,供推广应用。
The survey was carried out on 6 WMZ, WMX, ZYS, ZYL, JQJ and JQS Jiuzhaigou The results showed that P. A, A, RWC, Ψ_s ~ (sat), Ψ_s ~ (tlp), Ψ_s ~ (sat) -Ψ_s ~ (tlp), ROWC (tlp), RWC (tlp), AWC, ε max and so on, and the comprehensive drought resistance abilities of 6 provenances were evaluated by fuzzy mathematical membership function . The results showed that there was significant difference in provenance between ΨP, ΨA, RWC, Ψssat, Ψstlp, Ψssat-Ψstlp and εmax (P <0.05) ), Ψ_s ~ (tlp), and Ψ_s ~ (sat) -Ψ_s ~ (tlp) decreased with the increasing trend of RWC and ε ~ (max). Both RWC and εmax were positively correlated with longitude and annual precipitation Negative correlation or significant negative correlation, except for ROWC ~ (tlp), all the other parameters had positive or significant positive correlation with longitude and annual precipitation. The comprehensive drought resistance of the provenances of 6 provenances was JQS> JQJ> ZYL > ZYS> WMX> WMZ. Therefore, JQS and JQJ red sand seedlings can be used as good sources of red sand afforestation for the promotion and application.