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南非刺桐叶片上刺桐姬小蜂虫瘿分布特征 被引量:6
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作者 林龙 吴淑灵 梁光红 《江西农业大学学报》 CAS CSCD 北大核心 2012年第5期928-932,共5页
对刺桐姬小蜂(Quadrastichus erythrinae Kim)虫瘿在南非刺桐(Erythrina caffra Thunb.)叶片上的分布特征进行了调查研究。结果表明:刺桐姬小蜂主要危害南非刺桐的叶片和叶柄,树冠不同方位上其叶片受害率和受害叶虫瘿平均密度差异不显著... 对刺桐姬小蜂(Quadrastichus erythrinae Kim)虫瘿在南非刺桐(Erythrina caffra Thunb.)叶片上的分布特征进行了调查研究。结果表明:刺桐姬小蜂主要危害南非刺桐的叶片和叶柄,树冠不同方位上其叶片受害率和受害叶虫瘿平均密度差异不显著(P>0.05);在树冠的不同层次上其叶片受害率差异极显著(P<0.01),主要表现为上层>中层>下层;但各层次的受害叶虫瘿平均密度差异不显著(P>0.05)。虫瘿主要分布于叶片的基部和叶柄的中、上段部位,以单个和2个虫瘿相连的虫瘿团出现。南非刺桐叶片上刺桐姬小蜂虫瘿呈聚集分布,且聚集程度较强,其分布形式符合负二项分布,分布的基本成分为个体群,虫瘿聚集程度具有密度依赖性,聚集是由昆虫本身的习性和环境共同引起的。 展开更多
关键词 南非刺桐 刺桐姬小蜂 虫瘿 空间分布
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The importance of an indigenous tree to southern African communities with specific relevance to its domestication and commercialization: a case of the marula tree 被引量:3
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作者 Neo C MOKGOLODI DING You-fang +2 位作者 Moffat P SETSHOGO MA Chao LIU Yu-jun 《Forestry Studies in China》 CAS 2011年第1期36-44,共9页
Local communities in southern Africa derive many benefits from marula [Sclerocarya birrea(A.Rich.) Hochst.subsp.caffra(Sond.) Kokwaro].These include the contribution of this species towards health,nutrition,food s... Local communities in southern Africa derive many benefits from marula [Sclerocarya birrea(A.Rich.) Hochst.subsp.caffra(Sond.) Kokwaro].These include the contribution of this species towards health,nutrition,food security and conservation by sharing local skills and knowledge related to it.Marula fruits can be eaten fresh,squeezed to make juice,brewed in traditional beer or used to make jam and jelly.The kernels are also edible and can be pressed to extract oil for cooking and cosmetics,i.e.,for skin and hair application.The bark,roots,seeds and leaves are exploited for traditional medicinal purposes.Marula has acquired significant commercial value since its fruits and other products have entered local,regional and international trade in southern Africa.To diver-sify fruit production and satisfy the increasing demands for this resource,several domestication initiatives have been carried out at regional and international levels.The accumulated knowledge and skills relevant to the establishment and commercialization of marula therefore provide an effective guide in areas where marula remains undomesticated or underutilized.We discuss the great importance of marula in southern Africa to reveal its great potential to regions where it remains unexploited. 展开更多
关键词 Sclerocarya birrea subsp caffra marula southern Africa DOMESTICATION COMMERCIALIZATION
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