生石灰对镉胁迫下土壤酸碱度和烟叶镉含量的影响

doi:10.11924/j.issn.1000-6850.casb17060036

中国农学通报 ›› 2017, Vol. 33 ›› Issue (28): 19-25.doi: 10.11924/j.issn.1000-6850.casb17060036

所属专题：烟草种植与生产

生石灰对镉胁迫下土壤酸碱度和烟叶镉含量的影响

淡俊豪,齐绍武.,朱益,靳辉勇,梁仲哲

湖南农业大学农学院,湖南杂交水稻研究中心,湖南农业大学农学院,湖南农业大学农学院,湖南农业大学农学院

收稿日期:2017-06-06 修回日期:2017-07-19 接受日期:2017-08-09 出版日期:2017-10-24 发布日期:2017-10-24
通讯作者: 齐绍武.
基金资助:
湖南中烟科技项目“提高烟叶可用性的综合技术研发与示范”(011312800999)。

Effects of Quicklime Application on Soil pH and the Cadmium Content in Tobacco Under Cadmium Stress

齐绍武.,, and

Received:2017-06-06 Revised:2017-07-19 Accepted:2017-08-09 Online:2017-10-24 Published:2017-10-24

摘要/Abstract

摘要： 为探究烟草不同生育期施加不同量生石灰对土壤pH和烟草各部位镉含量的影响,采用盆栽试验,分别在烟草团棵期、旺长期、成熟期添加不同用量生石灰CK、T1、T2、T3(0kg/ha、1125kg/ha、2250kg/ha、3375kg/ha),烟叶成熟后采集植株样品进行相关指标测定。结果表明：(1)在酸性土壤中施加不同用量生石灰均可显著提高土壤pH值,土壤pH值依次为T3>T2>T1>CK。(2)团棵期施加处理T2可显著降低烟叶不同部位的镉含量；旺长期施加生石灰后烟草各部位的镉含量均有不同程度的降低,其中处理T2对烟叶镉含量的降幅最大,较对照降低了60.2%,显著低于其他处理；成熟期施加生石灰能降低根、茎、叶的Cd含量,对烟草种子中Cd含量降低不明显。(3)相关分析显示,土壤pH值与烟草根部Cd含量及烟草种子Cd含量显著负相关。由此可见,每公顷施加2250kg的生石灰(T2处理)不仅能提高土壤pH值,减少根系对土壤中镉的Cd吸收,还可以在烟草不同生育期有效降低烟叶Cd含量,适合施用在镉污染的烟田。

关键词: 颗粒肥, 颗粒肥, 香蕉菠萝茎叶堆肥, 有机粘结剂

Abstract: The pot experiment was designed to explore the effects on soil pH and the cadmium contents in tobacco when different levels of quicklime fertilizer was added at different tobacco growing stage under Cd stress. The different levels of quicklime including CK、T1、T2、T3(0kg/ha、1125kg/ha、2250kg/ha、3375kg/ha),the four levels of quicklime were added into soil at resettling, fast growing and maturing stages. After the harvest, the plant samples were gathered to analyze related indexes. The results showed that soil pH was significantly improved after quicklime was added into soil , and the order of soil pH was T3>T2>T1>CK. Meanwhile, the total Cd contents in different tobacco organs was significantly decreased when the T2 treatment was applied at resettling stage; after the quicklime was applied at fast growing stage, the total Cd content in different tobacco organs was declined in different degrees , the total Cd contents in tobacco leaves was decreased with a maximum reduction that was 60.2%below the control, which was significantly lower than other treatments; the total Cd contents was decreased in tobacco root, stem and leaves after the quicklime was applied, but it hasn’t significantly affection in tobacco seed. Besides, the correlation analysis showed that soil pH and the total Cd contents in tobacco root were significantly negatively correlated with the total Cd in tobacco seed. Thus it can be seen T2 treatment with 2250kg quicklime per hectare can significantly improve the soil pH ,decrease Cd absorption in root and efficiently reduce Cd content in tobacco leaves in the whole growth stage. So the application of T2 treatment was suitable for the Cd polluted soil.

淡俊豪,齐绍武.,朱益,靳辉勇,梁仲哲. 生石灰对镉胁迫下土壤酸碱度和烟叶镉含量的影响[J]. 中国农学通报, 2017, 33(28): 19-25.

齐绍武.,, and . Effects of Quicklime Application on Soil pH and the Cadmium Content in Tobacco Under Cadmium Stress[J]. Chinese Agricultural Science Bulletin, 2017, 33(28): 19-25.

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生石灰对镉胁迫下土壤酸碱度和烟叶镉含量的影响

Effects of Quicklime Application on Soil pH and the Cadmium Content in Tobacco Under Cadmium Stress

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