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对在日本种植的暖地型草类进行了比较,结果以无芒虎尾草和毛花雀稗耐旱性最强,其次为高梁,而薏苡和玉米耐旱性较差。耐旱草种在水分胁迫条件下叶水势较高,气孔阻力较低,使作物保持着良好的水分状态,且能把水分很好地用于光合作用和物质生产。并从支配耐旱性的三个方面:根系发育及其吸水能力,根系所吸收的水分往叶中的运送能力,提高叶中水分利用效率的能力,对耐旱的无芒虎尾革和不耐旱的薏苡进行了比较。还论述了养分吸收和植物体的营养状态与耐旱性的关系。
Comparison of warm-season grass species planted in Japan revealed that the strongest drought tolerance of C. armandii and P. capitatum followed by sorghum, and that of C. latifolia and maize were poor. Drought-tolerant grass species have higher leaf-water potential and lower stomatal resistance under water stress conditions, which keeps crops in good water condition and can well use moisture for photosynthesis and material production. And from the three aspects of drought-resistance: root development and water absorption capacity, the root absorption of water to the leaves of the transport capacity, improve leaf water use efficiency, Dried Coix were compared. Also discussed nutrient absorption and vegetative state and drought-resistant relationship.