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| Effects of passivating agents and foliar fertilizers on cadmium uptake and transport in wheat-maize rotation |
| Received:July 20, 2022 |
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| KeyWord:field;wheat and corn rotation;moderate and mild cadmium pollution;safe utilization;absorption and transportation |
| Author Name | Affiliation | E-mail | | CAO Yang | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China | | | LI Chengjuan | Soil and Fertilizer Workstation in Xianyang City, Shaanxi Province, Xianyang 712000, China | | | WANG Hui | Soil and Fertilizer Workstation in Xianyang City, Shaanxi Province, Xianyang 712000, China | | | DAI Yunchao | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China | | | SUN Benhua | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China | | | ZHANG Dongming | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China | | | WANG Xiaojing | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China | | | Lü Jialong | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China | ljlll@nwsuaf.edu.cn |
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| Abstract: |
| Wheat straw biochar and calcium magnesium phosphate fertilizer were selected as experimental soil passivation agents through field rotation experiments. These were used to study the effect of applying passivating agents and foliar fertilizers on cadmium absorption and transport in a field wheat-maize rotation and to realize the safe production of crops and use of cultivated land. Six treatments were set in the field:conventional wheat and corn planting(CK), basal biochar application(B), basal calcium magnesium phosphate fertilizer application(P), foliar selenium fertilizer spraying(F), basal biochar application with foliar selenium fertilizer(BF), and basal calcium magnesium phosphate application with foliar selenium fertilizer(PF). The cadmium content of wheat and maize grains, straws, and roots were detected after maturity, and the pH, available Cd, and total Cd of the cultivated soil were determined. The results show that compared with the CK treatment, the soil pH values of the wheat and maize treatments increased to different degrees, among which the B and BF treatments significantly increased the soil pH; the total amount of Cd in the wheat and maize treatments did not change significantly; P and PF treatment can significantly reduce available soil Cd content. Compared with the CK treatment, the Cd content in the grains of each treatment decreased to varying degrees, and the effect of foliar barrier combined with soil passivation technology(BF, PF) was better. Compared with CK treatment, the Cd content of wheat and maize grains in PF treatment decreased the most, with a decrease rate of 39.91% and 43.51%, respectively. The Cd content of wheat and maize grains in the BF treatment decreased by 22.58% and 33.53%, respectively, and the changes in the F, B, and P treatments were not significant. The reduction effect can be expressed as B |
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