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贾 彪,赵宝平,张 茹,鲁瑞英,王永宁,郭晓宇,陈 淼,雷雪峰,刘景辉.不同钝化剂对镉污染小麦镉富集及产量的影响[J].麦类作物学报,2024,(5):648
不同钝化剂对镉污染小麦镉富集及产量的影响
Effect of Different Passivators on Cadmium Transport Enrichment and Yield of Wheat under Cadmium Pollution
  
DOI:
中文关键词:  镉污染  小麦  转运系数  富集系数  生物量  产量
英文关键词:Cadmium contamination  Wheat  Transport coefficients  Enrichment coefficients  Biomass  Yield
基金项目:现代农业产业技术体系建设专项(CARS-07);内蒙古自治区高等学校科学研究重点项目(NJZZ19043)
作者单位
贾 彪,赵宝平,张 茹,鲁瑞英,王永宁,郭晓宇,陈 淼,雷雪峰,刘景辉 (1.内蒙古农业大学农学院内蒙古呼和浩特 010010 2.内蒙古农牧业生态与资源保护中心内蒙古呼和浩特 010000 3.巴彦淖尔市耕地质量监测保护中心内蒙古巴彦淖尔 015000 4.乌拉特后旗农村牧区生态能源环保站内蒙古巴彦淖尔 015000) 
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中文摘要:
      为实现河套灌区轻中度Cd污染农田的修复与安全利用,在河套灌区轻中度Cd污染农田开展了为期两年不同钝化剂处理的大田试验,7种钝化剂分别为生物炭(BC)、海泡石(SEP)、膨润土(BE)、坡缕石(PA)、腐植酸(HA)、硅酸钠(SS)、硫酸锰(MN),以不施用钝化剂为对照(CK),分析了不同处理下小麦产量、生物量、各器官Cd富集系数和转运系数,比较了不同钝化剂的钝化效果。结果表明,2020-2021年, SEP和SS处理较CK增产显著,增幅为11.09%~81.49%,各器官生物量均有不同程度的增加,其中籽粒及根增加显著;SS处理显著降低叶部Cd含量,降幅为26.75%,SEP处理显著降低籽粒Cd含量,降幅达47.62%。钝化剂处理下,各部位Cd富集系数均<1,根部到叶部Cd最高。小麦籽粒Cd含量与茎中Cd富集系数呈极显著的正相关,与茎向叶部、根向穗部的Cd转运系数呈显著的正相关;2年茎的Cd富集系数对籽粒Cd富集系数均有显著正效应,穗到籽粒、茎到叶的Cd转运系数对籽粒Cd富集系数影响最大。海泡石和硅酸钠处理增加了小麦产量,降低了植株Cd含量,抑制了Cd在植株体内的转运富集;内蒙古河套灌区轻中度Cd污染农田,推荐施用硅酸钠和海泡石进行小麦安全生产。
英文摘要:
      In the experiment, seven passivators were set up with biochar(BC), meerschaum(SEP), bentonite(BE), Po wisp(PA), humic acid(HA), sodium silicate(SS), and manganese sulfate(MN), and a two-year field test was carried out with no passivator as the control(CK). By analyzing wheat yield, biomass, organ enrichment coefficient and transport coefficient, the passivation effect of different passivators on mild-to-moderate Cd polluted farmland in Hetao irrigation area was explored. The results showed that from 2020 to 2021, the yield of SEP and SS increased significantly compared with that of CK, with an increase rate of 11.09%-81.49%; and the biomass of each part increased by different degrees, and the weight of grain and root increased significantly. The Cd content of leaves was significantly reduced by 26.75% under SS treatment and the Cd content of grain was significantly reduced by 47.62% under SEP treatment. The Cd enrichment coefficient of each part under the passivator treatment was less than 1. The Cd transport coefficients showed that the root to leaf transport was the highest. The Cd content of wheat grain was significantly positively correlated with the Cd enrichment coefficient in stem, and the Cd transport coefficient from stem to leaf and from root to panicle. Principal component analysis showed that the Cd enrichment coefficient of stem had a positive effect on the enrichment of Cd content in grain, and Cd had the greatest influence on Cd content in the transport process from ear to grain and from stem to leaf. SEP and SS not only increased wheat yield, but also reduced the Cd content in the plant, and inhibited the transport and enrichment of Cd in the plant. The application of sodium silicate and sepiolite can be considered to achieve the purpose of the contaminated farmland safety due to mild to moderate Cd pollution in the Hetao Irrigation Area of Inner Mongolia.
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