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IF 5.6 1区农林科学 Q1 AGRONOMY

Field Crops Research Pub Date : 2025-03-10 DOI:10.1016/j.fcr.2025.109841

Lei Sun , Yufan Wu , Yiming Fan , Puyuan Qi , Jianyu He , Zelin Hou , Quanzhong Huang , Guanhua Huang

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引用次数: 0

摘要

背景在盐碱土壤中实现向日葵的稳定产量（Y）具有挑战性。本研究旨在评估干旱地区向日葵微环境、向日葵产量、产量稳定性、氮素吸收（NU）和氮素部分要素生产率（PFPN）的综合影响。方法在中国西北地区进行了为期两个生长季（2022-2023 年）的田间试验，处理包括 IOD、SR、OS、常规滴灌（CDI）、仅施化肥（CK）和秸秆不还田（SNR）的不同组合。结果 IOD+SR+OS 处理显著提高了向日葵的产量和稳定性，平均产量达到 4.42 吨 hm-²，可持续性产量指数（SYI = 0.96）高，变异系数（CV = 2.9 %）低。与 CDI+SNR+CK 相比，PFPN 增加了 79.18 %，NU 增加了 49.39 %。该处理还提高了土壤氮储存量（NS），同时降低了盐储存量（SS），优化了土壤微环境，有利于作物生长和氮磷钾的吸收。皮尔逊相关分析表明，PFPN、NS 和 Y 之间存在很强的正相关性（P ≤ 0.01），而 SS 与 Y 之间存在负相关（P ≤ 0.001）。结论通过优化土壤水分、盐分和氮的分布，整合 IOD、SR 和 OS 可显著提高向日葵产量和在盐碱地中的稳定性，从而支持干旱地区的可持续农业。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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How do integrated agronomic practices enhance sunflower productivity and stability in saline-alkali soils of arid regions? Evidence from China

Context

Achieving stable sunflower yield (Y) in saline-alkali soils is challenging. Integrated agronomic practices, including irrigation on crop demand (IOD), straw return (SR), and organic substitution (OS), offer promising solutions, but their combined effects remain unclear.

Objective

This study aimed to evaluate the combined effects of IOD, SR, and OS on soil microenvironment, sunflower Y, Y stability, nitrogen uptake (NU), and nitrogen partial factor productivity (PFP_N) in arid regions.

Methods

A field experiment was conducted over two growing seasons (2022–2023) in northwest China, with treatments including different combinations of IOD, SR, OS, conventional drip irrigation (CDI), chemical fertilizer only (CK), and straw not return (SNR). Pearson and random forest analyses were applied to evaluate correlations, and rank the relative importance of each indicator to Y, respectively.

Results

The IOD+SR+OS treatment significantly improved sunflower Y and stability, achieving an average yield of 4.42 t hm⁻², with a high sustainability yield index (SYI = 0.96) and a low coefficient of variation (CV = 2.9 %). Compared to CDI+SNR+CK, it increased PFP_N by 79.18 % and NU by 49.39 %. This treatment also enhanced soil nitrogen storage (NS), while reducing salt storage (SS), optimizing soil microenvironment for crop growth and NU. Pearson correlation analysis revealed strong positive correlations between PFP_N, NS, and Y (P ≤ 0.01), while SS negatively correlated with Y (P ≤ 0.001). Random forest analysis identified SS and NS as key factors influencing sunflower Y.

Conclusions

Integrating IOD, SR, and OS significantly improves sunflower Y and stability in saline-alkali soils by optimizing soil water, salt, and nitrogen distribution, supporting sustainable agriculture in arid regions.

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来源期刊

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.