中国农业科学2024，Vol.57Issue(14)：2815-2826,12.DOI:10.3864/j.issn.0578-1752.2024.14.010
不同供锌水平麦田小麦锌营养对土施锌肥的响应
Response of Wheat Zinc Nutrition to Zinc Fertilization into Soils with Variable Available Zinc
摘要
Abstract
[Objective]The objective of this study was to clarify the response of soil available zinc(Zn)and wheat grain Zn concentration to soil Zn fertilization under different Zn supply field conditions,and to explore the Zn fertilizer regulation measures for grain Zn fortification based on soil available Zn,so as to provide a scientific basis for optimizing Zn fertilizer application and achieving wheat grain with high-yield and high-quality.[Method]The two-year location-fixed field experiments with five Zn fertilizer application rates of 0,6,12,18,and 24 kgZn·hm-2 were carried out at Taigu(high-Zn field)and Wanrong(low-Zn field)of Shanxi Province in the eastern Loess Plateau,respectively.The wheat grain yield and Zn concentration,Zn uptake and its translocation and distribution in the aerial part,as well as soil available Zn were investigated in the high-and low-Zn fields.[Result]Grain yield was not affected by Zn fertilizer rates in both high-and low-Zn fields.In high-Zn field,a slight increase in grain Zn concentration was observed with the increase of Zn fertilizer rates.For grain Zn concentration,no significant difference existed among all treatments in the first year,while it was increased by 2.4%-11.0% for Zn fertilization treatments as compared with that of no Zn fertilization in the second year.The grain Zn concentration was higher than 40 mg·kg-1 for all treatments.Compared with Zn application,the Zn transfer factor from straw to grain and grain Zn portioning index were decreased by 23.9%-37.9% and 4.3%-13.1%,respectively,and more than 20% of shoot Zn still remained in the stems and leaves at wheat harvest.In low-Zn field,the grain Zn concentration and Zn uptake in each organ increased with increasing Zn rates,whereas the opposite trend was observed for Zn transfer factor from straw to grain.Compared with no Zn application,the grain Zn concentration averaged two years increased by 9.4%-23.1%,while the Zn transfer factor from straw to grain decreased by 13.5%-24.5%,but no obvious difference was found for Zn portioning index among five Zn rates.In both high-and low-Zn fields,the soil available Zn increased significantly with the added Zn fertilizer.The regression analysis showed that soil available Zn slightly increased grain Zn concentration,and the increase with available Zn could be described by a quadratic function in high-Zn field,and the linear-with-plateau model showed that the grain Zn plateau of 34.76 mg·kg-1 was reached at the soil available Zn of 4.12 mg·kg-1.[Conclusion]Therefore,for the purpose of achieving desirable grain Zn concentration of 40 mg·kg-1 in the wheat monoculture aera of eastern Loess Plateau,it could be considered that higher soil available Zn played a critical role in the high-Zn field,and soil Zn fertilization could be considered to increase soil available Zn up to 4 mg·kg-1 first,and then other agronomic measures such as foliar Zn application should not be ignored to address the gap between the current grain Zn concentration and the recommended value in the low-Zn field.关键词
小麦/土施锌肥/土壤有效锌/籽粒锌含量/锌转运分配/黄土高原Key words
wheat/soil Zn application/soil available Zn/grain Zn concentration/Zn translocation and distribution/Loess Plateau引用本文复制引用
黄婷苗,陆乃昆,解秉强,曹寒冰,乔月静,杨珍平,高志强,李廷亮..不同供锌水平麦田小麦锌营养对土施锌肥的响应[J].中国农业科学,2024,57(14):2815-2826,12.基金项目
国家重点研发计划(2021YFD1900700)、农业农村部西北植物营养与农业环境重点实验室基金(ZWYY-2023-03)、山西省高等学校科技创新项目(2021L167)、黄土高原特色作物优质高效生产省部共建协同创新中心自主研发项目(SBGJXTZX-42)、山西省科技创新人才团队专项(202304051001042)、山西农业大学科技创新基金(2020BQ72) （2021YFD1900700）
