Effects of leaf residues from Ageratina adenophora on germination, growth and productivity of two rabi crops

Khatri, Kavita; Bargali, Kiran; Negi, Bhawna

doi:10.1016/j.chnaes.2022.05.001

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…Most of the studies on A. adenophora are confined to its ecology, distribution and impacts on native vegetation (Tererai & Wood, 2014;Fu et al, 2018;Wu et al, 2020). Negative impacts of the weed, such as altering native plants' species composition and inhibition of seed germination and growth of native plants as well as crops, have been reported by several previous studies (Thapa et al, 2020b;Darji et al, 2021;Khatri et al, 2023). Besides the impacts Journal of Nepal Biotechnology Association, 5 (1), 2024: 53-60 of A. adenophora on above-ground vegetation, some of the work has been concentrated to impact on the below-ground communities.…”

Section: Introductionmentioning

confidence: 99%

Impact of Invasive Ageratina adenophora on Soil Fungi in Native Plant-Grown Soils in Nepal

Darji,

Pathak,

Deuba

et al. 2024

J. Nepal. Biotech. Assoc.

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Invasion of alien plants impacts both the above- and below-ground communities. The specific response of soil microbes to alien plants may depend upon the presence of native inhabitants and the origin of the byproducts released from different parts of invasive plants. This study evaluated the response of common soil fungi against Ageratina adenophora byproducts (extracts) in the presence of two native shrubs, Elsholtzia blanda and Osbeckia stellata, in Nepal. A total of eight fungal species were isolated from soils where these two native species were grown separately, and the occurrence of the fungi was evaluated. The occurrence and frequency of fungus species varied with extracts of A. adenophora leaves, litter and roots as well as with the presence of specific native plants. Particularly, A. adenophora further inhibits the fungi that are naturally less frequent in soil, like Hormodendrum sp. and fresh leaves and litter of A. adenophora were responsible for inhibiting antagonistic fungi like Trichoderma harzianum. Influence in below-ground fungal communities by A. adenophora is one of the reasons for poor growth and development of native seedlings and the mechanism could be a strategy of invasion of A. adenohora in novel areas.

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Section: Introductionmentioning

confidence: 99%

Impact of Invasive Ageratina adenophora on Soil Fungi in Native Plant-Grown Soils in Nepal

Darji,

Pathak,

Deuba

et al. 2024

J. Nepal. Biotech. Assoc.

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“…Crofton weed is also a strong competitor as it shows rapid growth rates, which allow this species to outgrow or swiftly crowd out native ground vegetation and affect soil properties [24]. Previous studies have reported negative effects of Crofton weed on the growth and development of native species and crop plants [10,25]; however, impact assessments of Crofton weed on agricultural fields or as weeds of crops are still at rudimentary levels and require scientific studies.…”

Section: Introductionmentioning

confidence: 99%

Invasive Ageratina adenophora (Asteraceae) in Agroecosystems of Kumaun Himalaya, India: A Threat to Plant Diversity and Sustainable Crop Yield

2023

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Invasive plant species pose a serious threat to agricultural yield, although how the threat varies with the distance of crops from invasive plants remains unclear. Therefore, utilizing this viewpoint, objectives were formulated to quantify differences in the native vegetation and performance of crops growing near A. adenophora–invaded (treatment plots) and uninvaded ridges (control plots) in the terraced agricultural fields of Kumaun Central Himalaya. Morphological and yield parameters of two crops, viz. rice (Oryza sativa L.) and soybean (Glycine max L.), were assessed systematically by laying parallel transects from the ridge of the field up to 5 m towards the centre of the field in three equal distance intervals of 1 m in the order: 0–1 m, 2–3 m, and 4–5 m. Crofton weed showed 95–100% crown cover throughout invaded ridges/risers of terraced fields, with stem densities of 134–208 ind. m−2 and an average basal area of 0.15 cm2. The total mean density of herbs (other than A. adenophora) in invaded ridges/risers decreased by 38–85% compared to uninvaded ridges, but species richness increased by 31–37%. Soil nutrient availability was high across invaded ridges/risers as well as crop fields. The average irradiance level near uninvaded ridges was 19.6 ± 1.80%, and near invaded ridges, it was 1.8 ± 0.31%. Compared to straw, root, and grain yields obtained at the farthest distance, the yield of rice near uninvaded ridges was reduced by 27%, 19%, and 33%, while near invaded ridges, it was reduced by 37%, 39%, and 43%, respectively; the yield of soybean near uninvaded ridges declined by 62%, 66%, and 42%, while near invaded ridges, it decreased by 59%, 69%, and 47%, respectively. Compared to the values obtained at the farthest distance, the harvest index (HI) of rice near ridges was reduced by 7% and 13%, while the HI of soybean increased by 15 and 10% across uninvaded and invaded field ridges, respectively. The findings indicated that the Crofton weed could suppress field crops and could form a single dominant population in the invaded area, causing a serious threat to the plant community, its diversity, and the yield of the native agroecosystem in the foreseeable future if timely management actions would not be taken.

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“…Biological invasion is one of the key drivers hindering agriculture production, causing biodiversity loss, and negatively impacting ecosystem services (Rai & Singh 2020). Agricultural lands are one of the heavily invaded areas by an alien (invasive) weeds and its abundant growth has been reported on the croplands (Khatri et al, 2022). Invasive plants species produce large numbers of offspring, with greater chances of spreading widely (Ratnayake, 2015) and liberate allelochemicals into the soil reduce crop germination and growth (Hoque et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of Leaf Extracts of Lantana Camara L. on Germination and Growth of Some Crops Species

Acharya¹,

Poudel²,

Acharya³

2022

Saptagandaki J.

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Allelopathy is a biotic interaction between plants where one plant inhibits the germination and growth of other plants by releasing certain allelochemicals. In this research we evaluated the allelopathic effect of aqueous leaf extract of Lantana camara on the germination and growth of four crop plants. The experiment was conducted in sterilized petri dishes in Botany lab of Saptagandaki Multiple Campus, Bharatpur, Chitwan, Nepal. The effect of different concentrations of extracts was studied and compared with the control. The results revealed that the germination and seedling growth of all species were significantly inhibited at different concentrations as compared to the control. The lowest germination percentage and seedling growth was found in Brassica campestris and Oryza sativa plant respectively and effect was least in Triticum aestivum plant at 10% concentration. The germination percentages, seedling growth and, biomass in all species were observed to reduce, with the increasing concentration of aqueous extracts. The study concluded that Lantana camara leaf extract allelochemicals have adverse effects on germination, seedling growth and dry matter accumulation of all tested crops.

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Effects of leaf residues from Ageratina adenophora on germination, growth and productivity of two rabi crops

Cited by 8 publications

References 39 publications

Impact of Invasive Ageratina adenophora on Soil Fungi in Native Plant-Grown Soils in Nepal

Impact of Invasive Ageratina adenophora on Soil Fungi in Native Plant-Grown Soils in Nepal

Invasive Ageratina adenophora (Asteraceae) in Agroecosystems of Kumaun Himalaya, India: A Threat to Plant Diversity and Sustainable Crop Yield

Effect of Leaf Extracts of Lantana Camara L. on Germination and Growth of Some Crops Species

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