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| Effects of polyethylene microplastics exposure on growth and yield of Capsicum annuum L. |
| Received:March 29, 2023 Revised:May 23, 2023 |
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| KeyWord:polyethylene microplastic;photosynthetic pigment;Capsicum annuum L.;plant nutrient;yield |
| Author Name | Affiliation | E-mail | | YANG Guomei | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | | | LI Juan | Department of Geography and Environmental Science, Guizhou Normal University, Guiyang 550001, China | lijuan_113@126.com | | LONG Jian | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | | | LIAO Hongkai | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | | | RAN Taishan | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | | | ZHAO Yuxin | Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China | |
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| Abstract: |
| To better understand the impacts of microplastics on the growth and yield of vegetable crops, indoor pot experiments were adopted to study polyethylene microplastics(PE-MPs)from April to September of 2022. Effects of PE-MPs on the growth status, plant nutrients, photosynthetic pigment content and yield of Capsicum annuum L. at different growth stages(seedling, flowering and fruit stages) under different concentrations(0, 50, 500 and 2 500 mg·kg-1)were studied. The results showed that PE-MPs increased the root length, fresh weight and carbon content of Capsicum annuum L. in the seedling stage, but inhibited the plant height and synthesis of photosynthetic pigments when the concentration was 50 mg·kg-1. At the flowering stage, PE-MPs promoted root length and carbon content of Capsicum annuum L., but reduced plant height, fresh weight and phosphorus content, and promoted the synthesis of photosynthetic pigments at 2 500 mg·kg-1. In the fruit stage, PE-MPs promoted root length, carbon content and leaf carotenoid content of Capsicum annuum L., but inhibited plant height, fresh weight and phosphorus content. PE-MPs reduced Capsicum annuum L. yield by up to 42.86% per plant. In conclusion, PE-MPs can promote root growth and plant carbon content of Capsicum annuum L., but reduces plant height and yield, and has no significant effect on its biomass. Fresh weight, photosynthetic pigment content, nitrogen and phosphorus content are related to growth stage and PE-MPs concentration. PE-MPs has a certain impact on the growth and yield of Capsicum annuum L. Therefore, microplastics should be avoided in soil environments in agricultural production activities. |
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