| Autor: |
GE Ying, MA Jinchuan, ZOU Ping, PAN Jianqing, CHEN Lifen, SHI Qiwei, MA Junwei |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Guan'gai paishui xuebao, Vol 40, Iss 3, Pp 79-86 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1672-3317 |
| DOI: |
10.13522/j.cnki.ggps.2020471 |
| Popis: |
【Background】 Soil pollution by cadmium has become an increasing concern not only because of its toxicity after entering the food chain but also due to its detrimental impact on soil quality and developing sustainable agriculture. As all biogeochemical processes controlling Cd bioavailability in soil are modulated by soil moisture, we conjecture that improving water management should be able to immobilize Cd and reduce its root uptake and translocation in crop. 【Objective】 The purpose of this paper is to experimentally explore the appropriate water management to reduce Cd uptake and translocation in rice grown in lightly Cd-polluted paddy soils. 【Method】 The experiment was conducted in pots and consisted of seven treatments: Keeping the soil moist at a predefined level during the whole growth season (CK); keeping the pot flooded during the whole growth season (T1), flooding from the stem elongation stage onwards (T2), flooding from the panicle initiation to booting stage onwards (T3), flooding from the heading and flowering stage onwards (T4), flooding from milk grain stage onwards (T5), and flooding from dough grain stage onwards (T6). All treatments were drained one week before harvest. In each treatment, we measured Cd accumulation in different plant tissues, as well as the changes in redox potential and soluble Cd in the rhizosphere. 【Result】 Both redox potential and soluble Cd in soil were positively correlated at significant level (p |
| Databáze: |
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