I have the touch – evidence for considerable N transfer from peas to oats by rhizodeposition

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2024-08-30 DOI:10.1007/s11104-024-06904-3

Anke Hupe, Franziska Naether, Thorsten Haase, Christian Bruns, Jürgen Heß, Jens Dyckmans, Rainer Georg Joergensen, Florian Wichern

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Abstract

Aims

The current study quantified the carbon (C) and nitrogen (N) transfer from peas to oats under field conditions to assess the effects of intercropping. The data obtained were compared with previously published pot and field experiments.

Methods

Pea (Pisum sativum L. cv. Santana) and oat (Avena sativa L. cv Dominik) plants were grown as intercrops for 105 days. Pea plants were labelled with a solution of 2% ¹³C glucose (99 atom%) and 0.5% ¹⁵N urea (95 atom%), using the cotton wick technique.

Results

Pea rhizodeposits reached 540 kg C ha⁻¹ and 17 kg N ha⁻¹. CdfR (C derived from rhizodeposition) and NdfR corresponded to a proportion of 18.2 and 12.7%, respectively, of total pea biomass C and N. In the intercropped oat plants, only 0.6% of the total pea CdfR amount was found, but nearly 30% of the total pea NdfR amount.

Conclusions

CdfR and NdfR as proportion of total pea biomass C and N, respectively, were 2.5 times higher in peas intercropped with oat plants than in sole-cropped pea plants, comparing the current results with those from previously published pot and field experiments. Future studies on intercropping should consider root formation and rhizodeposition more often.

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我有触觉--豌豆通过根瘤沉积向燕麦转移大量氮的证据

目的本研究对田间条件下豌豆向燕麦的碳氮转移进行了量化，以评估间作的效果。方法将豌豆（Pisum sativum L. cv. Santana）和燕麦（Avena sativa L. cv Dominik）作为间作作物种植 105 天。采用棉芯技术，用 2% 13C 葡萄糖（99 原子%）和 0.5% 15N 尿素（95 原子%）溶液对豌豆植株进行标记。在间作燕麦的植株中，CdfR（根瘤沉积产生的碳）和 NdfR 分别占豌豆生物量碳和氮总量的 18.2% 和 12.7%。结论与之前发表的盆栽和田间试验结果相比，与燕麦植株间作的豌豆生物量 CdfR 和 NdfR 占豌豆生物量 C 和 N 总量的比例分别是单作豌豆植株的 2.5 倍。今后的间作研究应更多地考虑根的形成和根瘤的沉积。

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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.