影响不同土壤可利用磷地区小麦籽粒锌和锰浓度的关键因素

IF 5.6 1区 农林科学 Q1 AGRONOMY
Chenrui Liu , Haolin Wang , Yue Ma , Peiyi Guan , Qing Sun , Ziming Wang , Zilin Wang , Zhaohui Wang , Mei Shi
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引用次数: 0

摘要

背景或问题碱性土壤高磷(15 mg kg-1)导致的小麦籽粒锌(Zn)缺乏和锰(Mn)过量的问题已被广泛报道。本研究历时两年,采集了中国北方碱性土壤(pH7.5-9.4)273 块田的土壤和植物样品,分析了土壤磷(4.结果结果和结构方程模型表明,低土壤可利用磷(SAP)、高土壤NO3-N(SNN)和DTPA-Zn有利于提高籽粒锌浓度;低SAP、高SNN和低DTPA-Mn有利于降低籽粒锰浓度。在 SAP 为 15 毫克/千克的田块中,小麦籽粒锌浓度为 40 毫克/千克。当 SAP 为 15 毫克/千克或 30 毫克/千克时,SNN 的增加可显著提高籽粒锌含量;当 SAP 为 15-30 毫克/千克时,仅调节 SNN 的含量并不能提高籽粒锌含量,籽粒锌含量与土壤 DTPA-Zn 呈显著正相关。总之,本研究阐明了不同SAP水平地区影响小麦籽粒锌和锰浓度的关键土壤因子,通过优化氮肥和磷肥的施用以及改善外源锌的施用,可以在不同SAP水平下实现高籽粒锌,同时保持低锰水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Key factors influencing wheat grain zinc and manganese concentration in areas with different soil available phosphorus

Context or problem

Zinc (Zn) deficiency and manganese (Mn) excess in wheat grains caused by high soil phosphorus (P) (>15 mg kg−1) in alkaline soil have been widely reported. How to identify the key factors influencing wheat grain Zn and Mn concentration in the areas with different soil available P (SAP) levels and meanwhile achieve high-Zn and low-Mn in grains needs to be resolved.

Objectives

In the present research, we collected soil and plant samples from 273 fields of alkaline soils (pH 7.5–9.4) in northern China for two years to analyze the comprehensive influences of soil P (4.6–58.1 mg kg−1) and other soil physico-chemical properties on the content of Zn and Mn in wheat grains.

Results

Results and the structural equation model demonstrated that low soil available phosphorus (SAP), high soil NO3--N (SNN), and DTPA-Zn were beneficial for improving the grain Zn concentration; low SAP, high SNN, and lower DTPA-Mn were beneficial for decreasing grain Mn concentration. Samples of wheat grain Zn concentration > 40 mg kg−1 were found in the fields with SAP < 15 mg kg−1. The increase of SNN could significantly increase grain Zn when SAP < 15 mg kg−1 or > 30 mg kg−1; when SAP at 15–30 mg kg−1, only regulating SNN content did not increase grain Zn, grain Zn was significantly and positively correlated with soil DTPA-Zn. To decrease wheat grain Mn to lower than 48.7 mg kg−1 (the recommended safe threshold), SAP should be lower than 30 mg kg−1.

Conclusion

In conclusion, this research clarified the key soil factors influencing wheat grain Zn and Mn concentration in areas with different SAP levels, and by optimizing the application of N and P fertilizer and improving exogenous Zn application, high grain Zn while maintaining low Mn levels can be achieved with different SAP levels.

Implications

The findings of this study provide theoretical and technical support for guiding wheat production with high yield and high quality.

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来源期刊
Field Crops Research
Field Crops Research 农林科学-农艺学
CiteScore
9.60
自引率
12.10%
发文量
307
审稿时长
46 days
期刊介绍: Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.
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