生物炭基纳米锌对稻米锌含量和根际土壤速效养分的影响  

Effect of biochar-based nano-zinc on available nutrients in rice rhizosphere soil and zinc content in grain

作　　者：张海鹏 李莞意 施静 廖福兴 浦佳玲 杨艳菊 ZHANG Haipeng;LI Wanyi;SHI Jing;LIAO Fuxing;PU Jialing;YANG Yanju(Couege of Agriculture/Research Institute of Rice Industrial Engineering Technology,Yangzhou University,Yangzhou 225009,China;College of Environmental Science and Engineering,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学农学院/水稻产业工程技术研究院,江苏扬州225009 [2]扬州大学环境科学与工程学院,江苏扬州225009

出　　处：《实验技术与管理》2024年第11期86-94,共9页Experimental Technology and Management

基　　金：国家自然科学基金项目(32472223);江苏省高校优势学科建设工程项目(PAPD2023);扬州大学农学专业江苏省产教融合型品牌专业建设工程资助项目(2023-89);扬州大学“青蓝工程”骨干教师培养计划(2023-40)。

摘　　要：为了提高稻米中的锌含量,制备了生物炭基纳米锌复合材料,并用于改善稻根微环境和促进水稻籽粒锌吸收。实验结果表明,生物炭基纳米锌不仅增加了稻根土壤速效养分含量,还显著增加了稻根土壤有效锌含量,进而促进了水稻植株和稻米锌含量的增加,证实了生物炭基纳米锌对根区微环境和稻米锌含量具有显著影响。该项研究为提高稻米锌含量提供了一种解决方案,具有一定的应用潜力。[Objective]Incorporating contemporary research issues into educational curricula is essential in bridging the gap between theoretical knowledge and practical application.This study is designed to integrate the emerging topic of“novel fertilizers”with the fundamental theories of soil science and fertilizer resource development.In particular,this study explores the efficacy of biochar-based zinc fertilizers in increasing the zinc content in rice grains,an essential micronutrient that is often deficient in common diets.Biochar,as a carbon-rich product derived from the pyrolysis of organic materials,is used in this experiment as a carrier for zinc to enhance the soil microenvironment around rice roots,facilitating the uptake of zinc into the rice plants.[Methods]This experiment involved the preparation of biochar-enriched zinc fertilizers and their application to rice paddy fields.The biochar was derived from wheat straw pyrolyzed at 600℃,and zinc oxide nanoparticles(nZnO)were loaded onto the biochar using zinc acetate as a precursor.XRD and SEM analyses confirmed the successful loading of nZnO onto the biochar surface.The pot experiment included eight treatments:(1)no biochar and nZnO(T1),(2)20 t/ha biochar(T2),(3)100 kg/ha nZnO(0.5%nZnO,T3),(4)20 t/ha biochar+100 kg/ha nZnO(BC+0.5%nZnO,T4),(5)200 kg/ha nZnO(1.0%nZnO,T5),(6)20 t/ha biochar+200 kg/ha nZnO(BC+1.0%nZnO,T6),(7)200 kg/ha nZnO(2.0%nZnO,T7),and(8)20 t/ha biochar+200 kg/ha nZnO(BC+2.0%nZnO,T8).Students measured rice growth,yield,and nutrient content in the plants and grains,analyzing zinc fertilizer utilization and the impact of biochar-based nano-zinc on soil nutrients.The subsequent analyses focused on the bioavailability of zinc in the rhizosphere,i.e.,the root zone of the plants.[Results]The results from this study indicate that the application of biochar-based zinc significantly improved the nutrient availability within the rhizosphere.The study observed that the concentration of available zinc in the root soils markedly increased,which,in turn,p

关 键 词：水稻 纳米锌 锌含量 锌利用率 

分 类 号：X171.3[环境科学与工程—环境科学]