Grass straw mulching to suppress emergence and early growth of weeds

Oliveira, Rubem Silvério de; Rios, Fabiano Aparecido; Constantin, Jamil; Ishii–Iwamoto, Emy Luiza; Gemelli, Alexandre; Martini, Paola

doi:10.1590/s0100-83582014000100002

Cited by 24 publications

(23 citation statements)

References 16 publications

(11 reference statements)

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“…According to Oliveira et al (2014), the inhibitory effect of organic mulch on weeds may be due to both the physical (the reduced passage of solar radiation and temperature range on soil superficial layer) effect of emergence suppression and the possible chemical effects arising from allelochemicals released by straw that may have contributed to emergence reduction. Besides, allelopathic interaction and chemical/biological effects of mulching include changes in pH and nutrients dynamics in the soil.…”

Section: Effect Of Organic Mulchesmentioning

confidence: 99%

Weed Control in Clean Agriculture: A Review1

2016

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-Weed control is consider the major obstacle for the growers in the organic farming. Lower plant productivity in organic farming mainly related to the poor weed control. It is widely known, in most cases, that losses caused by weeds exceeded the losses from any category of agricultural pests. Under water-stress condition, weeds can reduce crop yields more than 50% through moisture competition alone. In the light of the environmental and toxicological problems created by herbicides, it has become necessary to develop the safety methods for controlling weeds. Soil Solarization, Mulching, Biodegradable Mulch, Natural Herbicides, Hot Water, and Agronomic Practices have been successfully adopted in many countries as safe methods for controlling weeds in the organic farming. In addition, there are some promising new and non-traditional measures such as Fresnel Lens, Electrical Weed Control, Lasers, etc which could be employed for controlling the weeds in organic farming. Also the agronomic practices such as choice of competitive varieties, stale seedbeds had a significant impact on weeds. The growers in organic farming should keep these three points in mind: 1) start clean stay clean successful, 2) Prevention is always better than treatment and, 3) One year's seeds will lead to seven year's weed infestation. Successful and sustainable weed management systems are those that employ combinations of techniques rather than relying on one method. The objectives of this paper are to review some safe weed control methods in the clean agricultural.Keywords: weeds, Safety methods, Mulch, Soil solarization, Natural herbicides, hot water, non-traditional methods. Palavras-chave: sementes, métodos de segurança, cobertura morta, solarização do solo, herbicidas naturais, água quente, métodos não tradicionais. RESUMO -O controle de plantas daninhas é considerado

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Section: Effect Of Organic Mulchesmentioning

confidence: 99%

Weed Control in Clean Agriculture: A Review1

2016

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“…This species is widely distributed in tropical countries and grows in various types of soils, but it thrives in well‐drained soils with good fertility . Ruzigrass is cultivated for both animal feed and straw supplies for no‐tillage systems . It has increasingly been used as a cover crop in many grain‐producing areas of Brazil.…”

Section: Introductionmentioning

confidence: 99%

“…The aerial parts of ruzigrass were previously screened for their phytotoxic activity against weed species in a greenhouse test, which revealed an inhibitory action on the emergence of the weed species Euphorbia heterophylla and Bidens pilosa . This effect was observed only when the pots were superficially irrigated, i. e., when water percolated through the straws, suggesting an effect of the secondary metabolites present in the ruzigrass straw in this process of inhibition …”

Section: Introductionmentioning

confidence: 99%

“…[7,10] Ruzigrass is cultivated for both animal feed [11] and straw supplies for no-tillage systems. [12] It has increasingly been used as a cover crop in many grain-producing areas of Brazil. It is either intercropped with corn or grown as a single crop in rotation with soybeans [13] because of its highly efficiency in producing biomass, which results in high levels of P and K recovery in soils and nutrient recycling.…”

Section: Introductionmentioning

confidence: 99%

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Chemical Characterization and Phytotoxic Effects of the Aerial Parts of Ruzigrass (Urochloa ruziziensis)

Moreno

Mantovanelli

Ricardo

et al. 2020

Chemistry & Biodiversity

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Studies of the phytotoxic effects between plants can be a crucial tool in the discovery of innovative compounds with herbicide potential. In this sense, we can highlight ruzigrass (Urochloa ruziziensis), which is traditionally used in the crop rotation system in order to reduce weed emergence. The aim of this work was to characterize the secondary metabolites of ruzigrass and to evaluate its phytotoxic effects. In total, eight compounds were isolated: friedelin, oleanolic acid, α‐amyrin, 1‐dehydrodiosgenone, sitosterol and stigmasterol glycosides, tricin and p‐coumaric acid. Phytotoxic effects of the crude methanolic extract and fractions of ruzigrass were assessed using germination rate, initial seedling growth, and biomass of Bidens pilosa, Euphorbia heterophylla and Ipomoea grandifolia. Chemometric analysis discriminated the weed species into three groups, and B. pilosa was the most affected by fractions of ruzigrass. The phytotoxic activities of 1‐dehydrodiosgenone, tricin, and p‐coumaric acid are also reported, and p‐coumaric acid and 1‐dehydrodiosgenone were active against B. pilosa.

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“…In terms of allelopathic effects, these species also have adverse effects on cropping systems; for example, the cinnamic acid derivative metabolized by Brachiaria species inhibits seed germination in Euphorbia heterophylla and Bidens pilosa (Oliveira et al 2014). However, there may be both negative as well as positive allelopathic effects of different species depending upon crops consortiums.…”

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confidence: 99%

Special metabolites isolated from Urochloa humidicola (Poaceae)

Oliveira

Nepomuceno

Castro

et al. 2017

An. Acad. Bras. Ciênc.

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This study aims to identify special metabolites in polar extracts from Urochloa humidicola (synonym Brachiaria humidicola) that have allelopathic effects and induce secondary photosensitization in ruminants. The compounds were isolated and identified via chromatographic and spectroscopic techniques. The compounds 4-hydroxy-3-methoxy-benzoic acid, trans-4-hydroxycinnamic acid, and p-hydroxy-benzoic acid; the flavonols isorhamnetin-3-O-β-d-glucopyranoside and methyl quercetin-3-O-β-d-glucuronate; and kaempferitrin, quercetin-3-O-α-l-rhamnopyranoside, and tricin were identified in the extract from the leaves of Urochloa humidicola. Two furostanic saponins, namely, dioscin and 3-O-α-l-rhamnopyranosyl-(1-4)-[α-l-rhamnopyranosyl-(1-2)]-β-d-glucopyranosyl-penogenin, as well as catechin-7-O-β-dglucopyranoside were identified in the methanolic extract obtained from the roots of this plant. This species features a range of metabolites that may be toxic for animals if used in food and may interfere with the growth medium, thereby inhibiting the development of other species.

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Grass straw mulching to suppress emergence and early growth of weeds

Cited by 24 publications

References 16 publications

Weed Control in Clean Agriculture: A Review1

Weed Control in Clean Agriculture: A Review1

Chemical Characterization and Phytotoxic Effects of the Aerial Parts of Ruzigrass (Urochloa ruziziensis)

Special metabolites isolated from Urochloa humidicola (Poaceae)

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