深圳市百合科地被植物应用现状及水分适应性研究

Studies on the Application and Water Adaptability of Ground Cover Plants of Liliaceae in Shenzhen

摘要:

为探讨在满足园林观赏性前提下植物的节水灌溉量，通过盆栽控水试验，比较了麦冬（Ophiopogon japonicas）、银边山菅兰（Dianella ensifolia ‘Silvery Stripe’）、蜘蛛抱蛋（Aspidistra elatior）、天门冬（Asparagus cochcinchinensis）等4种百合科植物在不同水分条件下植株的生长和光合指标的变化。结果表明，在土壤相对含水量为60%~65%（适宜水分）下，4种百合科地被植物均长势旺盛。麦冬、银边山菅兰、天门冬在土壤含水量为40%~45%（中度胁迫）时，仍可保持较好的观赏性。蜘蛛抱蛋耐旱性较强，可在20%~25%（重度胁迫）的土壤相对含水量下生长良好。这对百合科园林地被植物水分管理具有指导意义。

Abstract:

In order to understand the water-saving irrigation quantity in Shenzhen, the growth and photosynthetic characters of four Liliaceae ground cover plants, such as Ophiopogon japonicas, Dianella ensifolia ‘Silvery Stripe’, Aspidistra elatior and Asparagus cochcinchinensis, were studied under different relative soil water contents by potted water control method. The results showed that all of four ground cover plants grown strongly under relative soil water content of 60% to 65%. Ophiopogon japonicas, Dianella ensifolia cv. ‘Silvery Stripe’ and Asparagus cochcinchinensis grow well with good ornamental value under relative soil water content from 40% to 45%. Aspidistra elatior grows normally under relative soil water content from 20% to 25%. Therefore, it was instructive for water management of Liliaceae ground cover plants.