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三七对小麦的化感作用

王庆玲,董涛,张子龙**   

  1. (北京中医药大学中药学院, 北京 100102)
  • 出版日期:2015-02-07 发布日期:2015-02-07

Allelopathy of Panax notoginseng on wheat

WANG Qing-ling, DONG Tao, ZHANG Zi-long**   

  1. (College of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing 100102, China)
  • Online:2015-02-07 Published:2015-02-07

摘要:

以三七产区3个小麦品种(99-1、川麦45和文麦8号)为受体材料,测定不同浓度三七茎叶水浸液、根水浸液、绒根及其腐解液的化感作用,结果表明:(1)随浓度增加三七茎叶水浸液对供试小麦的发芽势、发芽率、发芽指数、平均发芽日数、苗高、根数、最长根、地上干重、地下干重、根冠比及总干重等指标均有明显抑制作用,而根水浸液只对最长根具有抑制作用,茎叶水浸液的化感作用更强;(2)三七绒根对各供试小麦品种均呈显著抑制作用,随添加量增大,抑制作用不断加强;(3)绒根腐解液对川麦45和文麦8号表现为“低促进,高抑制”的双向作用,而对991表现为抑制作用;(4)99-1和文麦8号对三七化感作用的敏感性较强,而川麦45的敏感性较弱,更适合与三七轮作。

 

关键词: 转移方程, 土壤-蔬菜系统, 镉污染, 风险阈值, 敏感性分布曲线

Abstract: With three wheat varieties (99-1, Chuanmai 45 and Wenmai No. 8) grown in Panax notoginsengproducing region as receptor materials, the allelopathic effects of different concentrations of stem and leaf aqueous extracts, root aqueous extracts, hair root and hair root rotted liquids from P. notoginseng were measured. The results showed that: (1) Stem and leaf aqueous extracts had obvious inhibition on the germination potential, germination rate, germination index, mean germination days, seedling height, root number, the length of longest root, shoot dry weight, root dry weight, ratio of root to shoot, and total dry weight of the tested wheat varieties, while root aqueous extracts inhibited only the length of longest roots. (2) Hair root showed significant inhibitory effects on the wheat cultivars. With the increase of concentration, the inhibition effects increased. (3) With the increase of concentration, hair root rotted liquids showed bidirectional effects of “promotion at low concentration and suppression at high concentration” on Chuanmai 45 and Wenmai No. 8, and inhibitory effects on variety 991. (4) The allelopathic sensitivity of 99-1 and Wenmai No. 8 to P. notoginseng was stronger compared with Chuanmai 45, and thus the latter would be more suitable for rotation with P. notoginseng.

Key words: soil-vegetable system, transfer function, risk threshold, species sensitivity distribution, Cd contamination