Subsurface drip irrigation reduces cadmium accumulation of pepper (Capsicum annuum L.) plants in upland soil

文献类型： 外文期刊

第一作者： Liu, Yuan

作者： Liu, Yuan;Hu, Chao;Li, Baogui;Ding, Dawei;Zhao, Zhijuan;Fan, Tao;Li, Zhongyang;Ding, Dawei;Li, Zhongyang

作者机构：

关键词： Subsurface drip irrigation; Surface drip irrigation; Alternate-rows irrigation; Cadmium

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2021 年 755 卷

页码：

收录情况： SCI

摘要： Given that Cd pollution in dry land has aroused wide public concern, numerous remediation technologies has been utilized, yet there are limited cost-effective techniques that do not affect the original planting patterns. Fortunately, irrigationmanagement can meet these requirements, while the effects of irrigation practices on Cd uptake by crops in slightly Cd-polluted upland soil remain elusive. Here, we aimed to investigate howthe irrigation methods altered the Cd availability in soil, Cd accumulation in plants, microorganism population in soil, rootmorphology, and enzyme activities in soil and plants. We examined three irrigation treatments - surface drip irrigation (DI), subsurface drip irrigation (SDI), alternate-rows irrigation (ARI), and the control conventional furrow irrigation (CFI). The results showed that SDI remarkably reduced Cd content in roots, shoots and fruits, increased yield, and improved root growth and activity in soil of 20-40 cm compared to other treatments, though the Cd concentration in rhizosphere was not decreased significantly. The microbial population and enzyme activities in rhizosphere and enzyme activities in leaves and roots in SDI and ARI were basically higher than DI and CFI. Therefore, SDI has the prominent potential to reduce Cd uptake by crops in upland soil polluted with low Cd. (C) 2020 Elsevier B.V. All rights reserved.

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