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本研究是测定花生不同种间的光合作用能力和确定光合作用与叶片特性的关系。用气体交换法测定30个花生(包括6个野生种和24个栽培种)叶片的光合强度。栽培种(Arachis hypogaea L.)光合作用的二氧化碳浓度范围在24—37毫克/平方分米/小时。最近改良的美国栽培种佛罗兰娜的光合强度要比其它大多数品种高。在两个盆栽试验和一个田间试验里,佛罗兰娜的光合强度分别是41和30毫克CO_2/平方分米/小时。野生种的光合强度一般都低于栽培种。在3个试验中,A.Pinoi Krap.et Greg的光合强度最低,单位叶面积干重最小。在其中两个试验,光合作用与叶片中氮和叶绿素含量呈正相关,但不十分明显。只有一个试验表现出光合作用与单位叶面积干重呈正相关。单位叶面积的气孔面积与光合强度呈负相关。在本研究中,讨论了光合强度与叶片特性的关系。
This study is to determine the ability of photosynthesis of different species of peanut and to determine the relationship between photosynthesis and leaf characteristics. The photosynthetic intensity of 30 peanuts (including 6 wild species and 24 cultivars) was measured by gas exchange method. Photosynthesis of cultivated species (Arachis hypogaea L.) has a carbon dioxide concentration range of 24-37 mg / dm / h. The recently improved American cultivar Florens has higher photosynthetic intensity than most other varieties. In two pot experiments and one field trial, Florida’s photosynthetic intensity was 41 and 30 mg CO2 / dm3 / h, respectively. Photosynthetic intensity of wild species are generally lower than the cultivars. In three experiments, A.Pinoi Krap.et Greg had the lowest photosynthetic intensity and the lowest dry weight per leaf area. In two of the experiments, photosynthesis was positively correlated with nitrogen and chlorophyll content in the leaves, but not very clearly. Only one experiment showed a positive correlation between photosynthesis and leaf dry weight per unit area. The area of stomata per unit area was negatively correlated with photosynthetic intensity. In this study, the relationship between photosynthetic intensity and leaf traits was discussed.