浙江农业学报

• 环境科学 • 上一篇    下一篇

水稻育秧基质肥力特征、育秧效果及环境生态风险评价

  

  1. (1. 主要粮食作物产业化湖北省协同创新中心,湖北 荆州 434025;2. 长江大学 农学院,湖北 荆州 434025)
  • 出版日期:2016-02-25 发布日期:2016-03-10

Fertility characteristics, seedling\|raising effects and environmental ecological risk evaluation of seedling raising matrixes

  1. (1. Hubei Collaborative Innovation Center for Grain Industry, Jingzhou 434025, China; 2. College of Agriculture, Yangtze University, Jingzhou 434025, China)
  • Online:2016-02-25 Published:2016-03-10

摘要: 以3种生产使用育秧基质为例,对其肥力特征进行检测,采用灰色分析方法评判育秧效果,并对其环境风险进行评估。结果表明,3种基质养分含量在26.63~32.77 g·kg-1之间,具有较好的肥力特征。其中,钟祥基质的养分均衡,pH值更适宜盘式育秧的需求。3种基质的育秧效果依次为钟祥基质>兴化基质>武汉基质。以盖籽土为营养土,底土为不同配比的基质时,育秧效果依次为100%基质>40%基质+60%自然土>30%基质+70%自然土>50%基质+50%自然土;以盖籽土为基质,底土为不同配比的基质时,育秧效果依次为100%基质>40%基质+60%自然土>50%基质+50%自然土>30%基质+70%自然土。3种基质的潜在生态风险指数处于中—强生态风险危害水平,重金属Hg,Cd为基质的主要污染因子。从节约成本和提高育秧效果角度考虑,在生产中推荐采用40%基质+60%自然土的底土配置方式。在基质的生产过程中需要考虑原料选择,减少或避免重金属污染带来的问题。

关键词: 育秧基质, 肥力, 环境生态风险评价, 秧苗素质

Abstract: In the present study, the seedling-nursery effects of 3 seedling raising matrixes were evaluated through gray analysis method, along with their fertility characteristics and potential environmental ecological risk being assessed. The results showed that the nutrients contents of 3 seedling raising matrixes were within 26.63-32.77 g·kg-1. Among 3 tested matrixes, Zhongxiang matrix exhibited a balanced nutritional composition and suitable pH range for disc seedling-nursery. The seedling raising effects decreased as Zhongxiang matrix > Xinghua matrix > Wuhan matrix. When nutritional soil was used as seed-cover soil and different ratios of matrixes were used as subsoil, the seedling raising effects decreased as 100% matrix > 40% matrix+60% natural soil > 30% matrix+70% natural soil > 50% matrix+50% natural soil. When matrix was used as seed\|cover soil and different ratios of matrixes were used as subsoil, the seedling raising effects decreased as 100% matrix > 40% matrix+60% natural soil > 50% matrix+50% natural soil > 30% matrix+70% natural soil. The potential ecological risk index was in middle to strong ecological risk level, and Hg and Cd were the main pollution factors. Considering cost and seedling\|raising effect, 40% matrix+60% natural soil was recommended for agricultural production. Meanwhile, raw material should be carefully selected for matrix production, in order to reduce or avoid heavy metal pollution.

Key words: seedling raising matrix, fertility, environmental ecological risk evaluation, seedling quality