Close mixed planting with pearl millet improves drought tolerance in rice by the increased access to deep water

Yamane, Koji; Araki, Chie; Watanabe, Yayoi; Iijima, Morio

doi:10.1007/s11104-017-3526-0

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…Very few drought studies were conducted using such cropping pattern combining flood-adaptive and drought-adaptive crops, and neither the results of field experiments nor the yield research on it was reported before. However, we found that the water availability of component crops imposed drought treatment was improved by the close mixed planting in lysimeter and pot experiment (Yamane et al, 2017). These results suggest that drought stress was mitigated by hydraulic lift (Vetterlein & Marschner, 1993), the passive transport of water through the root axis from deeper, wetter soil layers to drier, upper soil layers (Caldwell et al, 1998;Dawson, 1993;Liste & White, 2008;Sekiya et al, 2011).…”

Section: Introductionmentioning

confidence: 76%

Water supply from pearl millet by hydraulic lift can mitigate drought stress and improve productivity of rice by the close mixed planting

Izumi

Okaichi

Awala

et al. 2018

Plant Production Science

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The authors have proposed the close mixed planting technique using mixed seedlings of two different crop species that results in close tangling of their root systems. Especially, the combination of drought-adaptive upland crops (e.g. pearl millet or sorghum) and flood-adaptive lowland crop of rice would be beneficial to overcome the drought and flood conditions and to reduce the risks of crop failure. In our previous studies, we found that upland crop yield losses by flood stress was mitigated by mix-cropped rice, owing to the oxygen gas released from the rice roots into the aqueous rhizosphere. In the present study, we conducted two experiments to assess whether mixed cropping a drought-resistant cereal, pearl millet, would improve the performance of co-growing drought-susceptible crop, rice under drought conditions. In the field experiment, some grains were obtained from the rice plants mix-cropped with pearl millet under drought condition. However, no rice matured in the single cropping system. In the model experiment using deuterium analysis, it was confirmed that water absorbed by pearl millet roots from deep soil layer was utilized by rice, suggesting that mix-cropped rice could withstand drought stress and complete grain filling using water released into the upper soil layer by hydraulic lift.

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Section: Introductionmentioning

confidence: 76%

Water supply from pearl millet by hydraulic lift can mitigate drought stress and improve productivity of rice by the close mixed planting

Izumi

Okaichi

Awala

et al. 2018

Plant Production Science

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“…These ndings suggest that H. macrophylla may be sensitive to drought and can adapt to oligotrophic environments. Recently, several studies have shown that similar close mixed-planting can enable plants improve tolerance against environmental stresses (Nanhapo et al 2017;Yamane et al 2018). Therefore, we consider that the close growth of H. macrophylla to other plants in most of the populations may help it to alleviate drought stress.…”

Section: Native Habitatsmentioning

confidence: 99%

Native habitats and salt stress responses of wild Hydrangea macrophylla

Morimoto,

Harada,

Shukuya

et al. 2023

Preprint

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Hydrangea shrubs, developed from wild Hydrangea macrophylla endemic to Japan, are very important plants for landscaping and horticulture. H. macrophylla, likely speciated from H. serrata growing in the mountainous zone, have migrated into coastal zone. However, there is still a lack of information about the habitats of wild H. macrophylla and its adaptative responses to salt-stressed coastal environments. Therefore, in this study we conducted a survey of wild H. macrophylla populations and its native habitats. The results of the habitat survey showed that H. macrophylla is mainly distributed in coastal zones that have a saline atmosphere, triggered by high wind speed, high soil EC1:5 and large soil sodium contents, capable of causing severe damage to many plant species. Additionally, we confirmed some inland populations in a part of the Izu Peninsula and on the Izu islands. Several of these inland H. macrophylla populations inhabited mountain vegetation areas favored by H. serrata, and had thinner leaves than the coastal populations. We also found H. macrophylla individuals growing in oligotrophic environments such as on rocky surfaces and in volcanic ash scoria. Leaf cation analysis suggests that H. macrophylla adapts to salt stress by regulating Na+ allocation and preventing high leaf Na+ concentrations. The findings of this fundamental investigation of native habitats and adaptation to coastal zone should help facilitate further studies on H. macrophylla ecosystem, abiotic stress and conservation.

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“…In contrast, the areas located relatively close to the wetland system are prone to flooding, making them unsuitable for cultivating upland crops. In a series of basic research trials, under the conditions of flooding and drought events, crop growth and production were reported to be improved by the newly developed technique of a "close mixed-planting technique" (Awala et al 2016;Iijima et al 2016;Izumi et al 2018;Yamane et al 2018). In this technique, when the roots of rice and pearl millet become entangled, air is released from the roots of rice and utilised by pearl millet (Iijima et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Agronomic and socio-economic assessment of the introduction of a rice-based mixed cropping system to the Cuvelai seasonal wetland system in northern Namibia

Hirooka

Masuda

Watanabe

et al. 2021

Agrekon

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In the semi-arid regions of southern Africa, around the borders of Angola with Namibia, the Cuvelai seasonal wetland system is formed by floods during the rainy season. The objective of the present study was to assess the effects of introduction of a rice-based mixed cropping system to the seasonal wetlands (ondombe in the local language) from agronomic, social, and economic perspectives. For this purpose, we used a simple methodology with a multidisciplinary approach for yield and household survey and scenario analysis in northern Namibia. The yield survey revealed that in ondombe, rice showed a higher yield performance than that of pearl millet and sorghum, even in a drought year. The farm household survey showed that introducing a rice-based mixed cropping to ondombe could help local farmers enhance crop productivity by reducing labour and providing high rice yield. In addition, scenario analysis based on the yield and household surveys conducted in these regions suggested that the introduction of the mixed cropping system to ondombe could compensate for one-fourth of the governmental urgent food import budget even in drought years. Therefore, this system is an effective option for sustainable agricultural production and environmental management in the studied region.

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Close mixed planting with pearl millet improves drought tolerance in rice by the increased access to deep water

Cited by 10 publications

References 17 publications

Water supply from pearl millet by hydraulic lift can mitigate drought stress and improve productivity of rice by the close mixed planting

Water supply from pearl millet by hydraulic lift can mitigate drought stress and improve productivity of rice by the close mixed planting

Native habitats and salt stress responses of wild Hydrangea macrophylla

Agronomic and socio-economic assessment of the introduction of a rice-based mixed cropping system to the Cuvelai seasonal wetland system in northern Namibia

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