Crop Productivity and Nutrients Recovery in Maize–Soybean Additive Relay Intercropping Systems Under Subtropical Regions in Southwest China

Song, Chun; Wang, Qili; Zhang, Xiaofeng; Sarpong, Clement Kyei; Wang, Wenjing; Yong, Taiwen; Wang, Xiaochun; Wang, Yu; Yang, Wenyu

doi:10.1007/s42106-020-00090-9

Cited by 10 publications

(6 citation statements)

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“…Currently, the maize/soybean relay strip intercropping has been recognized by Chinese government as one major promotional agricultural cropping pattern because of its competitive advantages on the high yield per unit area and the increase of land equivalent rations (LER) over the traditional maize/soybean intercropping and soybean monoculture [31,35,63]. Our previous studies have demonstrated that the total crop yield of the maize/soybean relay strip intercropping (RI wn ) was significantly higher than the traditional maize/soybean intercropping with (RI e ) under a normal growing year, and the average LER of the grain yield was 1.79 for RI wn and 1.49 for RI e , respectively [63]. When compared with soybean monoculture, this specific intercropping decreased soybean yield to a small extent based on a 2-year field experiment, but additive relay strip intercropped maize increased the total crop yield in the intercropping system [63].…”

Section: Pcr Amplification and Phylogenetic Analysismentioning

confidence: 99%

“…Our previous studies have demonstrated that the total crop yield of the maize/soybean relay strip intercropping (RI wn ) was significantly higher than the traditional maize/soybean intercropping with (RI e ) under a normal growing year, and the average LER of the grain yield was 1.79 for RI wn and 1.49 for RI e , respectively [63]. When compared with soybean monoculture, this specific intercropping decreased soybean yield to a small extent based on a 2-year field experiment, but additive relay strip intercropped maize increased the total crop yield in the intercropping system [63]. In this current study, a 7-year continuous intercropping caused 24.8% lower disease incidence of soybean root rot than monoculture, but the final yield of soybean was not evaluated in both cropping patterns.…”

Section: Pcr Amplification and Phylogenetic Analysismentioning

confidence: 99%

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Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Chang

Naeem

et al. 2020

Pathogens

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Fusarium species are the most detrimental pathogens of soybean root rot worldwide, causing large loss in soybean production. Maize/soybean relay strip intercropping has significant advantages on the increase of crop yields and efficient use of agricultural resources, but its effects on the occurrence and pathogen population of soybean root rot are rarely known. In this study, root rot was investigated in the fields of the continuous maize/soybean strip relay intercropping and soybean monoculture. Fusarium species were isolated from diseased soybean roots and identified based on sequence analysis of translation elongation factor 1α (EF-1α) and RNA polymerase II second largest subunit (RPB2), and the diversity and pathogenicity of these species were also analyzed. Our results showed that intercropping significantly decreased soybean root rot over monoculture. A more diverse Fusarium population including Fusarium solani species complex (FSSC), F. incarnatum-equiseti species complex (FIESC), F. oxysporum, F. fujikuroi, F. proliferatum and F. verticillioides, F. graminearum and F. asiaticum was identified from intercropping while FSSC, FIESC, F. oxysporum, F. commune, F. asiaticum and F. meridionale were found from monoculture. All Fusarium species caused soybean root infection but exhibited distinct aggressiveness. The most aggressive F. oxysporum was more frequently isolated in monoculture than intercropping. FSSC and FIESC were the dominant species complex and differed in their aggressiveness. Additionally, F. fujikuroi, F. proliferatum and F. verticillioides were specifically identified from intercropping with weak or middle aggressiveness. Except for F. graminearum, F. meridionale and F. asiaticum were firstly reported to cause soybean root rot in China. This study indicates maize/soybean relay strip intercropping can reduce soybean root rot, change the diversity and aggressiveness of Fusarium species, which provides an important reference for effective management of this disease.

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Section: Pcr Amplification and Phylogenetic Analysismentioning

confidence: 99%

Section: Pcr Amplification and Phylogenetic Analysismentioning

confidence: 99%

Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Chang

Naeem

et al. 2020

Pathogens

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“…Soybean‐based maize strip intercropping increases P availability and acid phosphatase activity in the soil, thereby improving soil fertility and production of a number of crops 22 . In previous studies, the utilization rate of P fertilizer in a maize–soybean intercropping system reached 84.6% – 20.4% higher than that of single‐cropped maize 23 . PSB belonging to different genera can promote the absorption of insoluble P and enhance the growth of different crops 24 .…”

Section: Introductionmentioning

confidence: 98%

“…22 In previous studies, the utilization rate of P fertilizer in a maize-soybean intercropping system reached 84.6% -20.4% higher than that of single-cropped maize. 23 PSB belonging to different genera can promote the absorption of insoluble P and enhance the growth of different crops. 24 However, much of the research to date has focused on maize, 25 wheat, 26 rice 27 and other gramineous plants.…”

Section: Introductionmentioning

confidence: 99%

Growth promotion ability of phosphate‐solubilizing bacteria from the soybean rhizosphere under maize–soybean intercropping systems

et al. 2021

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BACKGROUND Optimum cultivation and management measures are needed to increase the phosphorus (P) absorption efficiency of crops for sustainable agricultural production. Previous studies indicated that leguminous crops can promote P absorption by neighboring gramineous crops. In this study, we isolated and screened the phosphate‐solubilizing bacteria (PSB) from soybean rhizosphere under a maize–soybean intercropping system in Southwest China, and nine PSBs with high P‐solubilizing ability were identified. RESULTS 16S rDNA sequencing and phylogenetic analysis showed that these PSBs belong mainly to Bacillus and Pseudomonas. The phosphate solubility of Bacillus aryabhattai B8W22 reached 388.62 μg mL−1. High‐performance liquid chromatographic analysis showed that each strain could secrete a large quantity of organic acids, including oxalic acid, malonic acid, citric acid and succinic acid. In addition, all strains produced indole acetic acid (IAA) and siderophores that could promote plant growth. Seed germination experiments testified that PSBs isolated in this study have an innate ability to promote plant growth. The plant culture pot experiment further illustrated that soil acid phosphatase (ACP) activity and available P content, as well as plant P uptake, increased significantly with PSBs inoculation. CONCLUSION PSBs from the rhizosphere soil of intercropped soybean could secrete organic acids that increase the solubilization of unavailable P, improve soil ACP activity and P availability, and produce IAA and siderophores that promote maize seed germination and seedling growth. Our findings indicate the PSBs from soybean rhizosphere have significant potential to reduce the application of chemical phosphate fertilizers and to promote sustainable agricultural development. © 2021 Society of Chemical Industry.

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“…(Chen et al 2021). Recently, a maize-soybean relay strip intercropping is widely practised in Southwest China, and this cropping pattern is characterized by two-row maize plants strip intercropped with two-to-four rows of soybean which has positive effects on increasing the land equivalent ratio (Yang et al 2015), improving the soil nutrients and microbe structure (Chen et al 2017;Song et al 2020Song et al ,2021, reducing weeds and diseases in the eld ( Chang et al 2020;Su et al 2018) and increasing crop yield (Du et al 2018;Liu et al 2017) as compared to soybean monoculture. This intercropping can also reduce the disease severity of Fusarium root rot and change the population diversity of the pathogenic Fusarium species in diseased soybean roots (Chang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Changes in the Density and Composition of Rhizosphere Pathogenic Fusarium and Beneficial Trichoderma Contributing to Reduced Root Rot of Intercropped Soybean

Chang

et al. 2021

Preprint

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BackgroundThe dynamic of soil-borne disease is closely related to the rhizosphere microbial communities. Maize-soybean intercropping can suppress soybean root rot as compared to monoculture. However, it is still unknown whether rhizosphere microbial community participates in the regulation of intercropped soybean root rot.MethodsIn this study, the difference of rhizosphere Fusarium and Trichoderma community was compared between healthy or root-rotted soybean rhizosphere soil from soybean monoculture and maize-soybean intercropping, and the inhibitory effect of potential biocontrol Trichoderma against pathogenic Fusarium were examined.ResultsThe abundance of rhizosphere Fusarium was remarkably different between intercropping and monoculture, while Trichoderma was largely accumulated in healthy rhizosphere soil of intercropping rather than monoculture. Four rhizosphere Fusarium species identified were all pathogenic to soybean but displayed distinct composition and isolation proportion in the corresponding soil types. As the dominant and most aggressive species, F. oxysporum was more frequently isolated in diseased soil of monoculture. Furthermore, of three Trichoderma species identified, T. harzianum dramatically increased in the rhizosphere of intercropping rather than monoculture as compared to T. virens and T. afroharzianum. For in-vitro antagonism test, Trichoderma strains had antagonistic effects on F. oxysporum with the percentage of mycelial inhibition ranging of 50.59%-92.94%, and they displayed good mycoparasitic abilities against F. oxysporum through coiling around and entering into the hyphae, expanding along cell-cell lumen and even dissolving cell walls of target fungus.ConclusionThese results indicate maize-soybean intercropping significantly increase the density and composition proportion of beneficial Trichoderma to antagonist the pathogenic Fusarium species, thus contributing to the suppression of soybean root rot under intercropping.

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Crop Productivity and Nutrients Recovery in Maize–Soybean Additive Relay Intercropping Systems Under Subtropical Regions in Southwest China

Cited by 10 publications

References 50 publications

Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Maize/Soybean Relay Strip Intercropping Reduces the Occurrence of Fusarium Root Rot and Changes the Diversity of the Pathogenic Fusarium Species

Growth promotion ability of phosphate‐solubilizing bacteria from the soybean rhizosphere under maize–soybean intercropping systems

Changes in the Density and Composition of Rhizosphere Pathogenic Fusarium and Beneficial Trichoderma Contributing to Reduced Root Rot of Intercropped Soybean

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