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首页> 外文期刊>Acta Horticulturae >The growth response of California native grasses to saline sprinkler irrigation.
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The growth response of California native grasses to saline sprinkler irrigation.

机译：加利福尼亚本地草对盐水喷灌的生长响应。

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摘要

Five California native grass species (Melica californica, Nassella pulchra, Sporobolus airoides, Muhlenbergia rigens and Deschampsia cespitosa) commonly used in California landscapes were examined for their growth response to salinity spray. Mature plants were sprinkler-irrigated with deionized (DI) water, low salt (500 mg NaCl/litre) and high salt solutions (1500 mg NaCl/litre) under greenhouse conditions for 20 weeks. The percentage of leaf chlorosis and shoot dry weight were measured to determine the relative tolerance rankings of the five species to salt stress. Shoot tissue concentrations of Na+, Cl-, K+ and Ca2+ were also measured. As expected, all five species were found to be suitable for sprinkler irrigation with saline water of 500 mg NaCl/litre with respect to shoot dry weight production. Above that level, D. cespitosa, Melica californica and N. pulchra produced significantly less shoot dry weight than their respective controls relative to the remaining species, Muhlenbergia rigens and S. airoides. Muhlenbergia rigens and S. airoides had relatively lower concentrations of Na+ and Cl-, were better able to maintain healthy levels of K+ and Ca2+ and were therefore, not as susceptible to damage by sprinkler irrigation with saline water at the salt levels studied.
机译：检查了加利福尼亚景观中常用的五种加利福尼亚本土草种（白花苜蓿，纳斯藻，纳斯孢菌，米伦木和德塞普斯切斯皮托沙）对盐雾的生长响应。在温室条件下，用去离子水，低盐（500 mg NaCl /升）和高盐溶液（1500 mg NaCl /升）对成熟植物进行洒水灌溉20周。测量叶绿化的百分比和枝干重量，以确定五种对盐胁迫的相对耐受性等级。还测量了芽组织中Na +，Cl-，K +和Ca 2+的浓度。正如预期的那样，就苗干重的产生而言，发现所有这五个种类都适合用500 mg NaCl / L的盐水喷水灌溉。高于该水平，相对于其余物种Muhlenbergia rigens和S. airoides，D.cespitosa，Melica californica和N. pulchra产生的笋干重明显低于其各自的对照。茂盛的Muhlenbergia rigens和S. airoides的Na +和Cl-浓度相对较低，能够更好地保持健康的K +和Ca2 +水平，因此，在所研究的盐浓度下，用盐水喷洒灌溉不易受到损害。

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