结缕草属植物蒸散量评价

以‘兰引3号’结缕草(Z077)(Zoysia japonica cv.Lany in No.3)、青岛结缕草(Z081)(Z.japonica cv.Qing dao)和马尼拉(Z014)(Z.matrella)为对照,研究结缕草属5个种48份种源的蒸散量。结果表明:供试材料的蒸散量变异范围为1.78-2.74mmol·m^-2·s^{- 1},变异系数9.01%;蒸散量显著低于3个对照的有12份;蒸散量在供试材料间差异极显著(P<0.01);5个种的蒸散量排序为:细叶结缕草>中华结缕草>结缕草>沟叶结缕草=大穗结缕草,其中结缕草的变异系数最大;结缕草和中华结缕草种内蒸散量差异极显著;中华结缕草的蒸散量与经度呈极显著线性负相关,而与纬度的相关不显著;结缕草的蒸散量与经度和纬度均呈显著线性负相关。

Assessment of Evapotranspiration on Zoysia spp.

The evapotranspiration of 51 accessions of Zoysia spp.which included three check accessions such as Lanyin No.3(Z077)(Z.japonica cv.Lanyin No.3),Qingdao(Z081)(Z.japonica cv.Qingdao) and Manila (Z014)(Z.matrella) were evaluated.The results showed that there were significantly differences on evapotranspiration among 51 tested accessions,evapotranspiration values ranged from 1.78 to 2.74mmol·m^-2·s^-1,and the average coefficient variation(CV) for all accessions was 9.01%.There were 12 accessions had lower evapotranspiration than the three check accessions.The average evapotranspiration of five species ranked in an order as Z.tenuifolia>Z.sinica>Z.japonica>Z.matrella and Z.macrostaycha.Accessions of Z.japonica had the largest coefficient variation on evapotranspiration.There were significant differences on evapotrans-piration among intra-species accessions in Z.japonica and Z.sinica.An extremely significant negative linear correlation relationship was demonstrated between the evapotranspiration in Z.sinica accessions and longitude the accessions collected,but latitude did not.However,a significant negative linear correlation relationship existed between the evapotranspiration of accessions in Z.japonica and both of longitude and latitude the accessions collected.