The simultaneous assessment of nitrogen and water use efficiency by intercropped pea and barley under contrasting pedoclimatic conditions

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2024-07-30 DOI:10.1007/s11104-024-06871-9

Zemmouri Bahia, Bouras Fatma Zohra, Haddad Benalia, Seghouani Mounir, Kherif Omar, Lambarraa-Lehnhardt Fatima, Kaouas Aicha, Lakehal Amdjed, Oulekhiari Hani, Latati Mourad

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引用次数: 0

Abstract

Background and aims

Currently, there is a pressing need to study and improve both water and nitrogen (N) use efficiency (WUE and NUE). Surprisingly, this topic has not been adequately documented in recent literature, particularly for intercropping systems. This study aims to assess the simultaneous changes in WUE and NUE of the rainfed pea-barley intercropping as compared to their monocultures.

Methods

Field trials were conducted over two growing seasons at four experimental sites characterized by varying soil and pedoclimatic conditions. WUE (i.e. kg biomass dry matter per m3 water) and NUE (i.e. Kg biomass dry matter per Kg nitrogen available) were measured in monocultures and intercropping systems.

Results

Our findings indicate that pea-barley intercropping had a greater advantage over monoculture in terms of grain yield (+ 61%) and yield quality (+ 83%) and to a lesser extent in term of plant biomass (+ 35%), except for site 4. Additionally, the results show that under higher rainfall conditions, intercropping exhibited the highest NUE values (5.07 kg grain N kg⁻¹ soil N at sowing), while the highest WUE values (1.40 kg m⁻³) were observed under low-rainfall. Quantifying the relationship between WUE and NUE indicated a positive correlation for intercropping (r² = 0.61, p ≤ 0.001) and pea monocrops for dry biomass during flowering (r² = 0.36, p ≤ 0.01).

Conclusion

These advantages of pea-barley intercropping can be attributed to the improved-use of N and water resources, considering their co-limitation under semiarid conditions.

Abstract Image

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在截然不同的气候条件下同时评估间作豌豆和大麦的氮和水利用效率

背景和目的目前，研究和提高水分和氮（N）的利用效率（WUE 和 NUE）迫在眉睫。令人惊讶的是，近期的文献中对这一主题的记载并不充分，尤其是在间作系统中。本研究旨在评估雨养豌豆-大麦间作与单作相比在水分利用效率和氮利用效率方面的同步变化。结果我们的研究结果表明，与单作相比，豌豆-大麦间作在谷物产量（+ 61%）和产量质量（+ 83%）方面具有更大的优势，但在植物生物量方面的优势较小（+ 35%），第 4 试验点除外。此外，结果表明，在降雨量较高的条件下，间作表现出最高的 NUE 值（播种时 5.07 千克谷物氮 kg-1 土壤氮），而在降雨量较低的条件下，观察到最高的 WUE 值（1.40 千克 m-3）。WUE和NUE之间的量化关系表明，间作（r2 = 0.61，p ≤ 0.001）和豌豆单作开花期干生物量（r2 = 0.36，p ≤ 0.01）呈正相关。

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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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.

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