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Comparison of Irrigation for Calamagrostis Brachytricha and Poa Pratensis
Author(s): 
Pages: 11-14
Year: Issue:  5
Journal: WATER SAVING IRRIGATION

Keyword:  拂子茅早熟禾土壤水势灌溉;
Abstract: 利用土壤水势作为灌溉指标,设置-30、-40、-50、-60 kPa 4个水势梯度,比较研究抗旱观赏草拂子茅和冷季型草坪草早熟禾在9月、10月的灌溉规律.拂子茅在土壤水势-30 ~-60 kPa时进行灌溉生长差异不显著,9、10两月的总灌溉量最低可达74.9 mm;早熟禾适宜在土壤水势达到-30 kPa时进行灌溉, 9、10月的总灌溉量为161.7 mm,低于-30 kPa的土壤水势下生长受影响.拂子茅和早熟禾的叶片水势都随土壤水势的下降而下降,拂子茅的下降速度低于早熟禾,具有较高的叶片水势,而拂子茅在-60 kPa的土壤水势处理下根冠比显著升高,说明拂子茅在干旱胁迫下具备较强的吸水和保水能力.
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