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应用生态学报 ›› 1998, Vol. 9 ›› Issue (3): 291-295.

• 研究论文 • 上一篇    下一篇

长喙田菁-Azorhizobium caulinodans共生固氮体系在华南地区的生长、结瘤、固氮和种子生产

杨中艺, 袁剑刚, 张宏达   

  1. 中山大学生命科学学院, 广州510275
  • 收稿日期:1996-09-25 修回日期:1997-08-18 出版日期:1998-05-25 发布日期:1998-05-25
  • 基金资助:

    国家博士后基金;广东省科委基金(90196)资助项目

Growth, nodulation, N-fixing and seed production of Sesbania rostrata-Azorhizobium caulinodans symbiosis in South China

Yang Zhongyi, Yuan Jiangang, Zhang Hongda   

  1. Zhongshan University, Guangzhou 510275
  • Received:1996-09-25 Revised:1997-08-18 Online:1998-05-25 Published:1998-05-25

摘要: 研究了长喙田菁-Azorhizobiumcaulinodans共生固氮体系在华南地区的生长、结瘤、固氮和种子生产。结果表明,长喙田菁-A.caulinodans共生固氮体系在华南地区生长正常,并具旺盛的茎根瘤结瘤作用。经65天的生长,其在湛江地区的单位面积生物量(干物质)和单位面积N产量分别为28752和681kg·hm-2, 远优于普通田菁的16520和352kg·hm-2;茎瘤菌A.caulinodans品系AR111和AR56在华南地区混合接种效果良好,植株茎瘤结瘤率达到100%, 平均单株茎瘤个数为182个,单株茎瘤鲜重约为1.2g, 茎瘤生物量在茎根瘤总生物量中所占比重为70%, 而其根瘤生物量略高于普通田菁;长喙田菁在华南地区能够正常开花结实,在栽植密度为4×104株·hm-2的条件下,其种子产量达3200kg·hm-2.

关键词: 长喙田菁, Azorhizobium caulinodans, 共生固氮体系, 华南地区, 生态位, 种间联结, 鱼类, 生态位分化

Abstract: Studies on the growth, nodulation, N-fixing and seed production of Sesbania rostrata-Azorhizobium caulinodans symbiosis in South China show that the symbiosis could grow and nodulate well in this area. The dry matter production and nitrogen yield of 65 days-old S. rostrata grown in Zhanjiang were 28752 and 681kg·hm-2, while those of S.cannabina were 16520 and 352kg·hm-2, respectively. Mixed inoculating A. caulinodans strians AR111 and AR56 to S. rostrata was available in South China, and a 100% appearance of stem nodule was observed. The average number and fresh weight of stem nodules per plant were 182 and 1.2g, respectively, and the biomass of stem nodules accounted for 70% of the total biomass of stem and root nodules. The biomass of root nodules was slightly higher than that of S.cannabina. S. rostrata could normally blossom and bear fruits in South China, and its seed production with a planting population of 4×104 per hectare was 3200kg·hm-2 .

Key words: Sesbania rostrata, Azorhizobium caulinodans, N-fixing symbiosis, South China, niche, fish, niche differentiation, interspecific association