YANG Dan,LIU Yan,GE Jiao.Effect of Dredged Sediments Utilization in Agricultural on Seedlings of Brassica campestris L.[J].Northern Horticulture,2016,40(16):177-181.[doi:10.11937/bfyy.201616046]
河道疏浚底泥农业利用对油菜幼苗生长的影响
- Title:
- Effect of Dredged Sediments Utilization in Agricultural on Seedlings of Brassica campestris L.
- Keywords:
- dredged sludge; agricultural utilization; pot experiment; seedling of Brassica campestris L.; growth effects
- 文献标志码:
- A
- 摘要:
- 为研究河道疏浚底泥提高土壤肥力、促进植物生长的可行性，通过盆栽油菜试验，分析了底泥以不同比例添加到土壤后，土壤理化性质及油菜幼苗的生长效应。结果表明：河道疏浚底泥的添加显著提高了油菜幼苗株高、生物量、叶片叶绿素含量及地上部分植株体内的C、N、P含量；当河道疏浚底泥与土壤以1∶2添加时增加最显著，株高比对照增加了42.9%，生物量比对照增加了1.34倍，叶绿素a和叶绿素b含量分别增加35.0%和22.2%，地上部分植株C、N、P含量分别比对照增加16.1%、1.55倍和45.15%；当底泥与土壤比例达到1∶1时，株高、叶片叶绿素、地上植株C、N、P含量开始下降，生物量甚至略低于对照处理，此时土壤全Cd含量超过《土壤环境质量标准》（GB15618-2008）二级标准。可见，河道疏浚底泥添加能够促进油菜幼苗生长，但高比例的疏浚底泥添加将导致土壤污染及植物生长胁迫。为避免重金属大量输入可能导致的生态风险，利用河道疏浚底泥提高土壤肥力时，添加比例应控制在50%以下。
- Abstract:
- In order to analyze the feasibility of dredged sediment utilization in improving soil fertility and plant growth，a pot experiment was conducted，in which the effect of dredged sediment addition on soil physicochemical properties and growth of Brassica campestris L.seedlings were observed.The results showed that the addition of dredged sediment had significantly increased the height，biomass，chlorophyll content in the leaf，content of C，N and P in the above-ground part of Brassica campestris L.seedlings.When the mix proportion of dredged sediment and soil reached 1∶2，the indexes were improve better than other treatments.The average height of Brassica campestris L.seedlings had increased 42.9%，the biomass increased 1.34 times，chlorophyll a and b increased 35.0% and 22.2% respectively，and concentration of C，N and P in the above-ground part increased 16.1%，1.55 times and 45.15% respectively.However，when the mix proportion reached 1∶1，the plant height，content of chlorophyll，C，N and P in the above-ground part of Brassica campestris L.seedlings began to decrease，the biomass was even less than the treatment which had no dredged sediment addition in soil.Soil Cd content had been more than the secondary standard of ‘Environmental quality standards for soils’(GB18918-2008) under this treatment.Therefore，the addition of dredged sediment could improve growth of Brassica campestris L.seedlings，but high proportion of dredged sediment utilization would cause soil contamination and stress on plant growth.The additive proportion of dredged sediment should be controlled below 50% to avoid the possible ecological risk while using its nutrients to improve soil fertility.
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备注/Memo
第一作者简介：杨丹（1982-），女，贵州兴义人，博士，副教授，现主要从事农业土壤环境质量评价与污染防治等研究工作。E-mail：yangdansky@163.com.基金项目:贵州省科学技术基金资助项目（黔科合J字[2013]2299号）；贵州省科学技术联合基金资助项目（黔科合LH字[2014]7180号）；贵州省重点学科生态学资助项目（ZDXK[2013]08）。