| 孟楠,安平,王萌,陈莉,郑涵,陈世宝.基于典型污灌区土壤筛选耐盐、Cd低吸收小麦品种[J].农业环境科学学报,2018,37(3):409-414. |
| 基于典型污灌区土壤筛选耐盐、Cd低吸收小麦品种 |
| Screening low-Cd wheat cultivars characterized with high salinity tolerance for typical sewage irrigation soils |
| 投稿时间：2017-09-11 |
| DOI：10.11654/jaes.2017-1237 |
| 中文关键词: 镉 污染土壤 盐分胁迫 物种敏感性分布 小麦 |
| 英文关键词: cadmium polluted soils salinity stress species sensitive distribution(SSD) wheat cultivars |
| 基金项目:国家支撑计划课题（2015BAD05B03）；国家重点研发计划项目（2016YFD0800707，2017YFD0800900） |
| 作者 | 单位 | E-mail | | 孟楠 | 中国农业科学院农业资源与农业区划研究所, 农业部植物营养与肥料重点实验室, 北京 100081 | | | 安平 | 南京中船绿洲环保有限公司, 南京 210039 | | | 王萌 | 中国农业科学院农业资源与农业区划研究所, 农业部植物营养与肥料重点实验室, 北京 100081 | | | 陈莉 | 北京市农林科学院植物保护环境保护研究所, 北京 100097 | | | 郑涵 | 中国农业科学院农业资源与农业区划研究所, 农业部植物营养与肥料重点实验室, 北京 100081 | | | 陈世宝 | 中国农业科学院农业资源与农业区划研究所, 农业部植物营养与肥料重点实验室, 北京 100081 | chenshibao@caas.cn |
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| 中文摘要: |
| 为了在污灌区重金属污染农田筛选同时具有耐盐与重金属低吸收特点的作物品种，采集了污灌区Cd污染农田土壤，添加0.4% NaCl平衡14 d后，利用盆栽实验测定不同小麦的耐盐指数与Cd富集系数，结合物种敏感性分布（SSD）模型对耐盐、Cd低吸收小麦品种进行筛选。研究结果表明：盐分胁迫对10种小麦的生长抑制程度具有明显差异，其中，中麦415与中优206受抑制程度最为明显，耐盐指数分别为0.542和0.591，而中优9507与中麦996植株生长正常；不同小麦耐盐指数大小依次为中优9507≈中麦996>轮选1690 > 轮选987 > 中麦1062 > 中麦175 > 中麦14 > 中麦816 > 中优206 > 中麦415。不同小麦茎叶与根对Cd的富集系数间存在较大差异；不同小麦茎叶对Cd富集系数为0.338（中麦996）~0.970（中优206），小麦根对Cd富集系数范围为3.01（中麦1062）~5.71（中麦14）。基于茎叶Cd富集系数（1/BCF）的SSD顺序为中麦996>轮选1690 > 中麦415 > 中麦1062 > 中麦175 > 中优9507 > 中麦816 > 中麦14 > 轮选987 > 中优206。基于Cd富集系数（1/BCF）与耐盐指数的物种敏感性分布频次，筛选出了同时具有耐盐分胁迫与Cd低吸收特点的小麦品种分别为中麦996与轮选1690。研究结果可为盐分胁迫条件下Cd污染土壤的安全利用提供参考依据。 |
| 英文摘要: |
| High salinity and heavy metal pollution are the main limiting factors of improving grain yield which can affect the grain quality of sewage irrigation field soils. Screening low-metal-uptake crop cultivars characterized with high salt tolerance can be important to safe cultivation in irrigation field soils polluted with heavy metals. In this study, a sewage irrigation field soil polluted by Cd was collected, the soil was artificially salinized with 0.4% NaCl(m/m) solution and incubated for 14 d before use, and then pot experiments were conducted to screen low-Cd-uptake wheat cultivars characterized with high salinity tolerance using the species sensitivity distribution model(SSD). The results indicated that significant difference(P<0.05) was observed for the growth inhibition from salt stress among the 10 wheat cultivars, with obvious growth inhibition observed for the wheat cultivars Zhongmai415 and Zhongyou206. The measured salt tolerance index(STI) values for Zhongmai415 and Zhongyou206 were 0.542 and 0.591, respectively; However, no growth inhibition was observed for Zhongmai996 and Zhongyou9507. The measured salt tolerance index values for the wheat cultivars followed the order:Zhongyou9507 ≈ Zhongmai996 > Lunxuan1690 > Lunxuan987 > Zhongmai1062 > Zhongmai175 > Zhongmai14 > Zhongmai816 > Zhongyou206 > Zhongmai415. Significant differences in bioconcentration factors(BCFs) of Cd by shoots and roots were also observed between wheat cultivars. The BCFs of Cd by shoots ranged from 0.338(Zhongmai996) to 0.970(Zhongyou206). In terms of roots, the BCFs of Cd by roots ranged from 3.01(Zhongmai1062) to 5.71(Zhongmai14). The distribution frequency based on the BCFs of shoots among wheat cultivars followed the order:Zhongmai996 > Lunxuan1690 > Zhongmai415 > Zhongmai1062 > Zhongmai175 > Zhongyou9507 > Zhongmai816 > Zhongmai14 > Lunxuan987 > Zhongyou206. By combing the distribution frequency of bioconcentration factors(1/BCF) and salt tolerance index, Zhongmai996 and Lunxuan1690 were screened as the wheat cultivars characterized with low Cd accumulation and high salt tolerance. These results are of importance for safe utilization of sewage irrigation field soil polluted by Cd. |
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