遮荫干扰对天然羊草分株种群光合产物及其分配的影响  

The Effect of Shading Interference on Photosynthate Distribution of Natural Leymus Chinensis Ramet Population

作　　者：王洪义[1] 王智慧[1] 

机构地区：[1]黑龙江八一农垦大学,黑龙江大庆163319

出　　处：《江西农业大学学报》2013年第3期646-651,共6页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(30370268;30870422);中国科学院战略性先导科技专项(XDA05050401)

摘　　要：研究4种遮荫强度0%(CK)、30%(S1)、50%(S2)、70%(S3)处理下天然羊草分株种群光合产物分配问题。结果表明:地上茎、叶鞘、叶片、根茎含糖量在不同处理间达到显著差异水平,其他器官糖含量变化也有不同的倾向性,说明遮荫能改变羊草各器官含糖量。另外,S1处理羊草的各器官总光合产物最高地上生物量也最大,S3处理羊草穗含糖量最高穗生物量也最大。各器官含糖量的变化,说明克隆植物在外界环境干扰下出现了明显的互惠共生和繁殖倾向性。The effects of four shading treatments,namely,0%（CK）,30%（S1）,50%（S2）and 70%（S3） on photosynthate distribution of natural Leymus Chinensis ramet population were studied.The results showed that shading influenced the content of sugar in the organs of Leymus Chinensis.There was significant difference in the content of sugar in the aboveground culms,sheath,leaf and rhizomes.The sugar contents in other organs also showed certain changing tendencies.In addition,experiments showed that the total content of photosynthate in the S1 was the highest.The content of sugar and biomss of spike in S3 were the highest.From the experiment results,there was a significant tendency of mutualism and reproduction in clonal plants under the interference of environment.

关 键 词：遮荫 光合产物 羊草 分株种群 

分 类 号：S543.9[农业科学—作物学]