e-journal

Nodulation and root growth increase in lower soil layers of water-limited faba bean intercropped with wheat

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Below-ground niche complementarity in legume–cereal intercrops may improve resource use efficiency
and root adaptability to environmental constraints. However, the effect of water limitation
on legume rooting and nodulation patterns in intercropping is poorly understood. To advance our
knowledge of mechanisms involved in water-limitation response, faba bean (Vicia faba L.) and
wheat (Triticum aestivum L.) were grown as mono- and intercrops in soil-filled plexiglass rhizoboxes
under water sufficiency (80% of water-holding capacity) and water limitation (30% of
water-holding capacity). We examined whether intercropping facilitates below-ground niche complementarity
under water limitation via interspecific root stratification coupled with modified nodulation
patterns. While no significant treatment effects were measured in intercropped wheat
growth parameters, water limitation induced a decrease in shoot and root biomass of monocropped
wheat. Likewise, shoot biomass and height, and root length of monocropped faba bean
significantly decreased under water limitation. Conversely, water limitation stimulated root biomass
of intercropped faba bean in the lower soil layer (15–30 cm soil depth). Similarly, total nodule
number of faba bean roots as well as nodule number in the lower soil layer increased under
intercropping regardless of water availability. Under water limitation, intercropping also led to a
significant increased nodule biomass (48%) in the lower soil layer as compared to monocropping.
The enhanced nodulation in the lower soil layer and the associated increase in root and
shoot growth provides evidence for a shift in niche occupancy when intercropped with wheat,
which improves water-limited faba bean performance.

Key words: intercropping / legumes / nodules / nitrogen / phosphorus / rhizosphere

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Ketersediaan

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Informasi Detail

Judul Seri

Journal Plant Nutrition Soil Science

No. Panggil

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Penerbit

London : WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim., 2016

Deskripsi Fisik

J. Plant Nutr. Soil Sci. 2016, 179, 537–546

Bahasa

English

ISBN/ISSN

DOI: 10.1002/jpln.20

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2016, 179

Subjek

PERTANIAN.

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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