The application of nutrients in enhancing drought tolerance of secretohalophyte Atriplex canescens in the desert regions of Northwest China

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2025-04-07 DOI:10.1007/s11104-025-07373-y

Jian-jun Kang, Wen-zhi Zhao, Zhi-bin He, Bing Liu, Rong Yang, Hai Zhou, Dong-Mei Zhang

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引用次数: 0

Abstract

Background and aims

Our previous studies indicated that nutrients (inorganic nutrients, IN; organic solutes, OS) played crucial roles in drought tolerance of desert xerophytes, which was closely related to the mutual combination and collaborative operation of nutrients (especially IN) to exert their comprehensive regulatory functions in plants. This study investigated the characteristic of main IN and OS in A. canescens (Perennial Chenopodiaceae introduced from the southwestern America desert to northwest China) in severely arid area (SAA) and extremely arid area (EAA), determined the optimal combination (OC) concentrations of the main IN in drought resistance of A. canescens, and then explored the roles and effectiveness of the OC concentrations as fertilizers application in desert regions of northwest China.

Methods

The characteristic of nutrients was investigated by field sampling analysis, the mutual combination effects of IN were investigated by orthogonal experimental design (OED) in pot cultural test, and then the roles of OC concentrations of IN as fertilizers were studied in the nursery and afforestation tests in desert areas.

Results

We found that A. canescens mainly accumulated large amount of soluble sugars (SS, carbohydrates) and potassium (K) for drought tolerance in SAA and EAA. The contributions of SS and K to drought tolerance of A. canescens in EAA and SAA were greatest which accounted for 36.35% and 15.4%, 37.75 and 18.23%, respectively. There were obvious effects of IN in the drought tolerance of A. canescens, and two OC concentrations of KNO₃, CaCl₂, MgCl₂ and Na₂SiO₃ in A. canescens were 4: 3: 2: 4 and 6: 2: 2: 3 (g kg⁻¹ dry soil). The two OC concentrations of IN as fertilizers application significantly stimulated the growth performance and raised the survival rate of transplanting and, concomitantly, promoted SS, K, N and B accumulation for A. canescens to cope with drought stress.

Conclusions

These results demonstrate that the IN combination plays very important roles in improving drought resistance of A. canescens, and the OC concentrations of IN can be utilized as fertilizers for A. canescens, which can be widely popularized and applied to restore and reconstruct degraded vegetation in arid areas.

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营养物质在提高西北荒漠分泌盐藓耐旱性中的应用

背景与目的我们之前的研究表明营养素(无机营养素，IN；有机溶质（organic solutes， OS）在荒漠旱生植物的抗旱性中起着至关重要的作用，这与养分（尤其是in）在植物体内相互组合协同运作发挥综合调控功能密切相关。研究了严重干旱区（SAA）和极干旱区（EAA） canescens（美洲西南部沙漠引种至中国西北地区的多年生藜科植物）主IN和OS的特征，确定了canescens主IN在抗旱性中的最佳组合浓度（OC），并探讨了OC浓度在西北荒漠地区施肥中的作用和效果。方法采用田间抽样分析方法，采用盆栽试验正交试验设计（OED）研究氮素的相互组合效应，并在荒漠地区苗圃和造林试验中研究氮素浓度作为肥料的作用。结果木香在SAA和EAA中主要积累了大量的可溶性糖（SS）、碳水化合物（糖类）和钾(K)。在EAA区和SAA区，SS和K对柽柳耐旱性的贡献最大，分别占36.35%和15.4%、37.75%和18.23%。IN对木犀草抗旱性有明显的影响，木犀草中KNO3、CaCl2、MgCl2和Na2SiO3的OC浓度分别为4:3:2:4和6:2:2:3 （g kg−1干土）。两种有机肥浓度的氮素均显著刺激了黑木犀的生长性能，提高了移栽成活率，同时促进了黑木犀对干旱胁迫的SS、K、N、B积累。结论综上所述，氮素组合在提高木香抗旱性方面具有重要作用，且氮素的OC浓度可以作为木香的肥料，在干旱区退化植被的恢复和重建中得到广泛推广和应用。

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来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.