...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant and Soil >Effects of elevated nickel and cadmium concentrations on growth and nutrient uptake of mycorrhizal and non-mycorrhizal Pinus sylvestris seedlings
【24h】

Effects of elevated nickel and cadmium concentrations on growth and nutrient uptake of mycorrhizal and non-mycorrhizal Pinus sylvestris seedlings

机译：镍和镉浓度升高对菌根和非菌根樟子松幼苗生长和养分吸收的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effects of Ni and Cd on growth and nutrient uptake of mycorrhizal and non-mycorrhizal Pinus sylvestris L. seedlings were investigated in a pot experiment. Seedlings were either inoculated with Laccaria bicolor (Maire) Orton or left uninoculated before being planted in pots containing a mixture of sandy soil from the B-horizon of a coniferous forest, small stones and pure quartz sand. The pots were supplied with small amounts of a balanced nutrient solution every 24 h using peristaltic pumps. Nickel or Cd were added as chlorides to the nutrient solution at levels of 85 μM Ni (Ni 1), 170 μM Ni (Ni 2), or 8.9 μM Cd. Mycorrhizal colonisation of the roots was nearly 100% in the mycorrhizal treatments. The mycorrhizal seedlings grew significantly better than the non-mycorrhizal ones. The weight of mycorrhizal seedlings in the Ni 2 treatment was 29% lower than that of the mycorrhizal controls, but still 34% greater than that of the non-mycorrhizal seedlings not exposed to metals. There was an overall, statistically significant, negative effect of metals on plant yield. Mycorrhizal plants had lower root:shoot (R:S) ratios than non-mycorrhizal plants and the R:S ratio was increased by metal exposure, particularly in the non-mycorrhizal seedlings. Plant concentrations of Cd or Ni were not affected by mycorrhizal colonisation, but total uptake of Cd and Ni was higher in bigger mycorrhizal seedlings. Nickel decreased P concentration in all seedlings and Cd decreased P concentration in the non-mycorrhizal seedlings. Generally, the mycorrhizal seedlings grew better than non-mycorrhizal ones and had better P, K, Mg and S status. Root growth was not significantly affected by the metal treatments. The reduction in mean shoot growth of non-mycorrhizal plants, relative to the metal-free control, appeared higher than in mycorrhizal plants but was not statistically significant due to high variation in the non-mycorrhizal plants not exposed to metals. The main mycorrhizal effect was thus increased nutrient uptake and growth of the seedlings.
机译：通过盆栽试验研究了镍和镉对菌根和非菌根樟子松幼苗生长和养分吸收的影响。幼苗可以用双色的Laccaria bicolor（Maire）Orton接种，也可以不接种，然后种植在装有来自针叶林B地平线的沙质土壤，小石头和纯石英砂的混合物的花盆中。使用蠕动泵每24小时向盆中供应少量的平衡营养液。将镍或镉作为氯化物以85μMNi（Ni 1），170μMNi（Ni 2）或8.9μMCd的形式添加到营养液中。在菌根治疗中，根的菌根定植接近100％。菌根幼苗的生长明显好于非菌根幼苗。 Ni 2处理的菌根幼苗的重量比菌根对照的重量低29％，但仍比未暴露于金属的非菌根幼苗的重量高34％。金属对植物产量具有总体上，统计学上显着的负面影响。菌根植物的根：茎（R：S）比非菌根植物低，并且R：S比通过金属暴露而增加，特别是在非菌根幼苗中。镉和镍的植物浓度不受菌根定植的影响，但更大的菌根幼苗中镉和镍的总吸收量较高。镍降低了所有幼苗的磷含量，镉降低了非菌根幼苗的磷含量。通常，菌根幼苗的生长要好于非菌根的幼苗，并且其P，K，Mg和S状况更好。金属处理对根系生长没有显着影响。相对于无金属对照，非菌根植物的平均芽生长的降低似乎高于菌根植物，但由于未暴露于金属的非菌根植物的高度变化，统计学上无统计学意义。因此，主要的菌根作用是增加养分吸收和幼苗生长。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号