盐渍地区草坪草品种及其混播组合筛选的研究

Satudies on Screening of Cold-season Turfgrass Cultivars and Mixed Composition for Saline Soil

对 11种草坪草室内发芽试验表明 :盐浓度 0 %～ 1.6 %NaCl胁迫下相对发芽率均随盐浓度升高而下降 ,呈线性回归关系。在北方盐渍地上 0～ 2 0cm土层全盐含量不超过 1.0 %时 ,混播优于单播。表现较好的混播是多年生黑麦草 +碱茅 +草地早熟禾或匍匐翦股颖。其中多年生黑麦草发芽快、幼苗生长迅速 ,很快覆盖地面 ,有利于其他种子的萌发 ,称为保护种。碱茅幼苗期及成株后耐盐性均较强 ,但苗期生长慢 ,适宜与多年生黑麦草伴生。

The germination percentages of 11 turfgrass cultivars are observed at varying salt concentrations between 0.0 and 16 000 mg/kgNaCl. Germination results show that total germination declines as salt level are increasing. Short term of 3 month tests of turf quality are undertaken in saline field. Results suggests that Perennial reygrass is valuable as protection grass for maintaining grass cover in saline soil. It germinates early and grows rapidly, it s cover helps to prevent salt concentration on soil surface, thus benefits the sensitive turfgrass. While Weeping alkaligrass grew slower than perennial ryegrass, but essential for cover surviving in high saline environment. Most mixed composition produces better turf quality than that of Weeping alkaligrass. These mixtures are Perennial ryegrass +Weeping alkaligrass+Kentucky bluegrass or bentgrass.