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| Differences in foliar inhibitor effects on Cd and Pb accumulation and transport in corn |
| Received:December 21, 2022 Revised:February 08, 2023 |
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| KeyWord:foliar inhibitor;corn;Cd;Pb;accumulation;translocation |
| Author Name | Affiliation | E-mail | | LIU Qi | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
Yunnan Soil Fertilizer and Pollution Repair Engineering Research Center, Kunming 650201, China | | | WANG Sheng | Yunnan Soil Fertilizer and Pollution Repair Engineering Research Center, Kunming 650201, China
College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China | | | ZHAO Xuanyue | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
Yunnan Soil Fertilizer and Pollution Repair Engineering Research Center, Kunming 650201, China | | | CHEN Wen | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
Yunnan Soil Fertilizer and Pollution Repair Engineering Research Center, Kunming 650201, China | | | BAO Li | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
Yunnan Soil Fertilizer and Pollution Repair Engineering Research Center, Kunming 650201, China | | | ZHANG Naiming | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
Yunnan Soil Fertilizer and Pollution Repair Engineering Research Center, Kunming 650201, China | zhangnaiming@sina.com |
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| Abstract: |
| This study aimed to investigate the effects of different types of foliar inhibitors on Cd and Pb uptake in corn and to achieve safe production of crops in heavy metal-contaminated land. Eight treatments were set up in a field experiment, with "Huaxing dan 88" cultivated variety as the test corn： control（CK）, YZ-1, YZ-2, YZ-3, YZ-4, cadmium reduction spirit（JGL）, PPF and WWS, to investigate the differences in biological traits, as well as Cd and Pb enrichment and transport coefficients in different parts of corn. The results showed that the yield increased by 4.8%-30.4% under the seven types of foliar inhibitors, compared with CK, showing the following trend： WWS < PPF < JGL < YZ-1 < YZ-2 < YZ-4 < YZ-3. The Cd and Pb contents and enrichment coefficients of each part of the test corn were seed < cob < stalk < leaf < root. The Cd and Pb contents and enrichment coefficients of corn seeds were lower than those of CK. Compared with CK, the Cd and Pb contents in corn seeds decreased by 13.9%-69.4% and 16.7%-55.6%, respectively, and the enrichment coefficients of Cd and Pb decreased by 14.5%-70.8% and 11.5%-49.8%, respectively, under the treatment of 7 foliar inhibitors, following the trend of CK > WWS > PPF > YZ-4 > YZ-3 > JGL > YZ-2 > YZ-1. The transport coefficients of each part of the test corn ranked as root-stalk < stalk-cob < cob-seed < stalk-leaf. The field tests ranked the Cd and Pb control effects of the seven tested foliar inhibitors as YZ-1 > YZ- 2 > JGL > YZ-3 > YZ-4 > PPF > WWS. Under the conditions of this test, YZ-3 is the best foliar inhibitor for yield increase, and its use is recommended in corn production areas with light to moderate Cd pollution. YZ-1 is the best foliar inhibitor for Cd and Pb control, and it also has the lowest cost. YZ-1, as the best and cheapest foliar inhibitor for Cd and Pb control, is recommended for use in the main corn producing areas with heavy Cd pollution. |
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