农业环境科学学报2025，Vol.44Issue(10)：2538-2549,12.DOI:10.11654/jaes.2024-1118
羟基磷灰石-膨润土纳米复合材料对旱区玉米生长的影响
Effects of hydroxyapatite-bentonite nanocomposites on maize growth in arid regions
李鲁汉 1孙阳萍 1马瑞雪 1赵营 2赵晓琛 3韦革宏 1陈春1
作者信息
- 1. 西北农林科技大学生命科学学院,陕西杨凌 712100||作物抗逆与高效生产全国重点实验室,陕西杨凌 712100
- 2. 宁夏农林科学院农业资源与环境研究所,银川 750002
- 3. 天津坤禾生物科技集团股份有限公司,天津 300450
- 折叠
摘要
Abstract
To optimize the phosphorus release capacity of hydroxyapatite(HAP).Enhance maize growth by increase soil available phosphorus content,improve the phosphorus absorption and drought resistance,this study modified HAP with bentonite(BE)to produce nano-fertilizer compound(BE-HAP).Using a combination of pot experiments and soil microcosm techniques,we explored the mechanisms by which BE-HAP composites influence plant phosphorus uptake,improve maize growth under drought conditions,promote soil nutrient transformation,and regulation soil microbial community structure.The results showed that the 1∶1 BE-HAP composite significantly increased the available phosphorus content in sandy soil by 64.8％,42.3％,21.3％,and 84.2％at 0,28,42 and 56 days respectively.Furthermore,BE-HAP treatment significantly enhanced phosphorus content in maize plants by 35.1％and 35.7％,boosting growth and photosynthesis under drought stress,and improving maize dry weight of above and below ground by 93.7％and 186.0％.This treatment also reduced malondialdehyde levels by 45.0％,increased the activity of antioxidant enzymes,and strengthened maize's resistance to oxidative stress.In addition,the relative abundances of Chitinophaga were significantly reduced by increasing soil phosphorus nutrients with different proportions of BE-HAP treatment.Functional prediction using FAPROTAX revealed that the 5∶1 and 10∶1 BE-HAP composites stimulated several microbially mediated carbon and nitrogen cycling processes,such as nitrogen fixation and nitrate denitrification,thereby accelerating microbial nutrient cycling.In summary,hydroxyapatite-bentonite nanocomposites can significantly enhance the growth performance of maize under drought stress.This is achieved through multiple mechanisms,including increasing the available phosphorus content in the soil,mitigating oxidative damage in plants,accumulating drought-resistant substances,and promoting nutrient conversion driven by microbial activity.关键词
羟基磷灰石/膨润土/磷肥/旱区/磷吸收Key words
hydroxyapatite/bentonite/phosphate fertilizer/arid region/phosphorus absorption分类
农业科学引用本文复制引用
李鲁汉,孙阳萍,马瑞雪,赵营,赵晓琛,韦革宏,陈春..羟基磷灰石-膨润土纳米复合材料对旱区玉米生长的影响[J].农业环境科学学报,2025,44(10):2538-2549,12.
