Effects of Salinity on Seashore Paspalum Cultivars at Different Mowing Heights
Effects of Salinity on Seashore Paspalum Cultivars at Different Mowing Heights
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DOI：
10.2135/cropsci2011.06.0337
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发表时间：
2012-05
期刊：
影响因子：
2.3
通讯作者：
Mohamed Shahba;S. Alshammary;M. Abbas
中科院分区：
文献类型：
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作者：
Mohamed Shahba;S. Alshammary;M. Abbas
以滨海雀稗（Paspalum vaginatum Swartz）3个品种（Salam、Excalibur和Adalayd）为试材，研究了不同盐度对草坪质量、修剪产量、根质量、冠层光合速率（Pn）、总非结构性碳水化合物含量（TNC）、地上部还原糖含量（RSC）、脯氨酸含量和K + /Na +的影响。使用温室水培系统在不同割草高度下对这些品种进行了评估。Salam在0、16、32和44 dS m −1盐度水平下的刈割产量分别比Adalayd高11.9、24.2、36.5和55.7%。在最高割草高度下，随着盐度从0增加到44 dS m-1，Salam、Excalibur和Adalayd的根质量分别增加了162.9%、170.0%和204.0%。在44 dS m −1时，萨拉姆的Pn值最高（在25、35和45 mm割草高度下分别为16.66、19.89和25.85 μmol CO 2 M −2 S −1）。当盐度从0增加到44 dS m −1时，在25 mm、35 mm和45 mm割草高度下，萨拉姆的TNC分别下降了44.2%、29.2%和25.5%，而RSC分别增加了49.3%、44.3%和40.3%。在萨拉姆，随着盐分水平从0增加到44 dS m-1，在25、35和45 mm割草高度下，脯氨酸含量分别增加了417.7%、429.5%和438.7%。雀稗有最高的K + /Na +的选择性时，保持在45毫米割草高度。增加刈割高度可提高海滨雀稗品种的耐盐性。
The objective of this research was to evaluate the effects of salinity on turf quality, clipping yield, root mass, canopy photosynthetic rate (Pn), total nonstructural carbohydrate content (TNC), shoot reducing sugar content (RSC), proline content, and K + /Na + in shoots and roots of seashore paspalum (Paspalum vaginatum Swartz) cultivars (Salam, Excalibur, and Adalayd). These cultivars were evaluated at different mowing heights using a hydroponics system in the greenhouse. Salam achieved 11.9, 24.2, 36.5, and 55.7% more clipping yield than Adalayd at 0, 16, 32, and 44 dS m −1 salinity levels, respectively, under the highest mowing level. At the highest mowing height, the root mass of Salam, Excalibur, and Adalayd increased by 162.9, 170.0, and 204.0%, respectively, as salinity increased from 0 to 44 dS m −1 . The values of Pn in Salam were the highest (16.66, 19.89, and 25.85 μmol CO 2 M −2 S −1 at 25-, 35-, and 45-mm mowing heights, respectively) at 44 dS m −1 . The TNC decreased by 44.2, 29.2, and 25.5% in Salam while RSC increased by 49.3, 44.3, and 40.3% at 25-, 35-, and 45-mm mowing heights, respectively, as salinity increased from 0 to 44 dS m −1 . In Salam, as salinity levels increased from 0 to 44 dS m −1 , proline content increased by 417.7, 429.5, and 438.7% at 25-, 35-, and 45-mm mowing heights, respectively. Paspalum had its highest selectivity of K + /Na + when maintained at 45-mm mowing height. Salinity tolerance of seashore paspalum cultivars can be enhanced by increasing mowing height.