Weed flora survey in alfalfa (<i>Medicago sativa</i>L.) fields of Shabestar (northwest of Iran)

Hassannejad, Sirous; Ghafarbi, Soheila Porheidar

doi:10.1080/03650340.2013.859383

Cited by 99 publications

(6 citation statements)

References 34 publications

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“…Weeds found in survey were classified into 18 families of which Poaceae, Asteraceae and Chenopodiaceae were the most dominant families (Table 1). These results were confirmed by Hassannejad and Ghafarbi (2014) and El-Ghazali and Al-Soqeer (2013) who had added Brassicaceae to the list.…”

Section: Noxious Species and Frequencysupporting

confidence: 52%

Screening of weeds and their effect on alfalfa (Medicago sativa)

MSEDDI¹,

ALGHAMDI²,

SHARAWY³

et al. 2017

Indian J Agri Sci

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Alfalfa (Medicago sativa L.) fed as hay to livestock, was the first forage crop in the Middle East and the Arabian Gulf countries, which contributed to the success of dairy industry. The invasion of alfalfa fields by weeds was found a serious problem for farmers since it tends to reduce the quality and the quantity of the crop. In this study, 60 weed plant species were found in 13 private fields in Hail region (Saudi Arabia). Invasive weeds reduce alfalfa yield from 22.66 to 11.94 t/ha after 5 years of culture. In the same period, weed density increased from 21.3 to 69 plants/m2.The family dominance index (FDI) shows that Poaceae, Asteraceae and Chenopodiaceae were the most abundant families in alfalfa fields. Cynodon dactylon (L.) Pers., Portulaca oleracea L., Conyzabonariensis (L.) Cronquist, Malva parviflora L., Chenopodium murale L., Setaria verticillata (L.), P. Beauv., Eleusine indica (L.) Gaertn, Digitaria sanguinalis (L.) Scop, Tribulus terrestris L., Convolvulus arvensis L. and Echinochloa colona (L.) Link. were the most abundant, frequent and noxious weeds in alfalfa fields according to their Total Relative Dominance (TRD). Theharmful effect of the most noxious weeds was reported.

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Section: Noxious Species and Frequencysupporting

confidence: 52%

Screening of weeds and their effect on alfalfa (Medicago sativa)

MSEDDI¹,

ALGHAMDI²,

SHARAWY³

et al. 2017

Indian J Agri Sci

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“…The establishment period of perennial forages, such as alfalfa seedlings, are particularly susceptible to weed competition during the seeding year, and weeds that emerge after seeding reduce alfalfa success or cause permanent damage to its productivity throughout the life of the stand ( Raoofi and Alebrahim, 2017 ). Previous studies report that weeds affect the stability of alfalfa stands, attributed to the competition with alfalfa for environmental resources, such as light, nutrients, and water resources ( He et al, 2018 ; De Matos et al, 2019 ; Kanatas et al, 2021 ), which in turn decrease the yield, quality and the regulation of the soil properties and microorganisms ( Hassannejad and Ghafarbi, 2014 ; Sardans et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Weeds in the Alfalfa Field Decrease Rhizosphere Microbial Diversity and Association Networks in the North China Plain

et al. 2022

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The competition between weeds and crops for soil nutrients is affected by soil microorganisms, which drive diverse ecological processes and are critical in maintaining the stability of agroecosystems. However, the effects of plant species identity, particularly between forage and weed, on soil microbial diversity, composition, and association are not well understood. Here, we investigate the soil physicochemical properties and bacterial/fungal communities in an agroecosystem with native alfalfa [Medicago stativa (Ms)] and five common weed species (Digitaria sanguinalis, Echinochloa crusgalli, Acalypha australis, Portulaca oleracea, and Chenopodium album) in the North China Plain. The five weeds had a lower plant carbon content than Ms. while the opposite was true for plant nitrogen and phosphorus concentrations. The Shannon diversity of bacterial and fungal communities of the five weeds were significantly lower than in Ms. Soil pH and PO43−-P were identified as the most important factors in shaping the relative abundances of bacteria (Sphingomonadaceae) and fungi (Pleosporaceae), respectively. Importantly, the weeds greatly inhibited the growth of pathogenic fungi (Nectriaceae and Pleosporaceae). Bacterial co-occurrence networks depended on specific species, indicating that Ms. harbored co-occurrence networks that were more complex than those in the bacterial communities of other weed groups. Our study examines how soil nutrients and the soil microbial community structure of five weed species changed in an Ms. field. This analysis of the microbial ecological network enhances our understanding of the influence of weeds on the soil microbiome in agroecosystems.

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“…Abundance and distribution in space are positively correlated (Gaston and Blackburn 2000). Nevertheless, the effect of altitude on invasive weed distribution was more important than other environmental factors (Hassannejad and Ghafarbi 2014). The differences in the structure and composition of native community population dynamics appeared from the lower weed diversity and richness as well as evenness indexes in the invaded sites as compared with the non-invaded community, especially in the summer season.…”

Section: Characterization Of the Community's Vegetation In Invaded An...mentioning

confidence: 95%

The relationship between Invasive Alien Solanum elaeagnifolium Cav. characters and impacts in different habitats

Balah

Hassany

2023

Biologia

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Invasive alien plants are one of the most serious threats to agriculture. The growth traits of Solanum elaeagnifolium Cav. in crops and their demographics in invaded vs non-invaded communities were examined. The majority of S. elaeagnifolium germination was observed in the spring compared to the summer. Five stages were distinguished, which started with a short time of seedling and juvenile stages, extended flowering, and fruiting stages, and seed dispersion in the winter season. An increase in shoots/roots ratio, leaf area ratio and leaf mass fraction during growth with the varied rate was proved. The accumulation coefficient of dry mass exceeded 0.93 and was significant (P > 0.001) with great variability within plant parts, and stage intervals. While the high growth rate is influenced by the stages and habitats. The recipient communities are affected negatively by S. elaeagnifolium invasion which is associated with lower diversity, richness, and evenness vs non-invaded communities. High similarities were found in the invaded area and communities. Finally, high and varied growth and plasticity of S. elaeagnifolium characterized their invasion behavior via different habitats. There were suitable determinants indices of diversity that can be used in the comparison between invaded and non-invaded communities. This knowledge may be useful for use in agro-environment protection and to improve the management methods of invasive alien species.

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Weed flora survey in alfalfa (Medicago sativaL.) fields of Shabestar (northwest of Iran)

Cited by 99 publications

References 34 publications

Screening of weeds and their effect on alfalfa (Medicago sativa)

Screening of weeds and their effect on alfalfa (Medicago sativa)

Weeds in the Alfalfa Field Decrease Rhizosphere Microbial Diversity and Association Networks in the North China Plain

The relationship between Invasive Alien Solanum elaeagnifolium Cav. characters and impacts in different habitats

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