含磷物质对铅耐性与敏感性植物生长及磷铅吸收的影响

李维立; 方月英; 赵 玲; 曹心德

文章摘要

李维立,方月英,赵玲,曹心德.含磷物质对铅耐性与敏感性植物生长及磷铅吸收的影响[J].农业环境科学学报,2014,33(7):1288-1293.

含磷物质对铅耐性与敏感性植物生长及磷铅吸收的影响

Effects of Phosphorous-containing Substances on Growth and Phosphorous and Lead Uptake of Lead-Tolerant and Sensitive Plants

DOI：10.11654/jaes.2014.07.005

中文关键词: 含磷物质芥蓝小白菜铅植物根表面

英文关键词: phosphorous-containing substance kale Chinese cabbage lead root surface

基金项目:

作者	单位
李维立	上海交通大学环境科学与工程学院，上海 200240
方月英	上海交通大学环境科学与工程学院，上海 200240
赵玲	上海交通大学环境科学与工程学院，上海 200240
曹心德	上海交通大学环境科学与工程学院，上海 200240

摘要点击次数: 2045

全文下载次数: 2247

中文摘要:

将耐性植物芥蓝（Brassica capitata）与敏感植物小白菜（Brassica chinensis）暴露于含Pb的营养液中，通过添加磷灰石矿尾料（PR）、重过磷酸钙（TSP）及二者混合物（P+T）处理，研究含磷物质对两种植物吸收Pb的影响以及Pb在植物根表面形态变化过程。结果显示：添加含磷物质降低了耐性植物芥蓝根部Pb的含量，但对地上部Pb吸收的影响不显著；对敏感植物小白菜来说， PR和P+T处理的植物根部及地上部 Pb的含量与对照基本一致，而TSP处理促进了Pb的吸收，表现出小白菜根部及地上部Pb的含量显著高于对照组。含磷物质添加诱导了Pb在植物根表面形成Pb5（PO4）3Cl、Pb5（PO4）3OH的沉淀，但这并没有直接导致两种植物对Pb吸收量的减少。

英文摘要:

Lead-tolerant plant kale（Brassica capitata） and Pb-sensitive plant Chinese cabbage（Brassica chinensis） were exposed to nutrient solution containing Pb to examine the transformation of Pb on root surface and Pb uptake by plants after adding phosphate rock tailing（PR）, triple superphosphate fertilizer（TSP） and their combination（P+T） to the solution. Applying phosphorous-containing substances enhanced phosphorous uptake in roots and shoot of Chinese cabbage and roots of kale, with effects being TSP＞P+T＞PR, but had no effect on shoot phosphorous in kale. Lead concentrations in roots of tolerant kale were reduced, but those in shoot were not significantly affected by additions of phosphorous-containing substances. For Chinese cabbage, PR and P+T treatments had little effect on Pb concentrations in both root and shoot, while applying TSP enhanced Pb uptake. Additions of phosphorous-containing substances induced formations of Pb5（PO4）3Cl and Pb5（PO4）3OH on the surface of plant roots. However, this was in no position to directly reduce Pb absorption by plants.

HTML 查看全文查看/发表评论下载PDF阅读器