Effects of different densities of wild oat (Avena fatua L.) and nitrogen rates on oilseed rape (Brassica napus L.) yield

Kazemeini, Seyed Abdolreza; Naderi, R.; Aliabadi, Hadis Karimi

doi:10.5141/ecoenv.2013.167

Cited by 5 publications

(3 citation statements)

References 21 publications

(21 reference statements)

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“…Particularly, N application up to 36 kg N ha −1 increased multiple-weed competitiveness to soybean, resulting in a significant yield loss more than 89% at 12 plants m −2 of the total density equivalent (Figure 3). Previous studies also indicated that N fertilizer increases weed competitiveness against crops including rice [11], wheat [14,29] and oilseed rape [30]. The N effect on weed competitiveness with crops might be dependent on interference relationships, since N application changes both crop growth and weed biomass.…”

Section: Discussionmentioning

confidence: 99%

Modeling the Effects of Nitrogen Fertilizer and Multiple Weed Interference on Soybean Yield

Song

Kim

et al. 2021

Agronomy

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Understanding the effects of nitrogen (N) fertilizer on soybean-weed competition is essential for establishing a practical tool for N application and weed management. A two-year field experiment was conducted in a soybean field located in Bogatyrka (43.82° N, 131.6° E), Primorsky krai, Russia, to investigate the effects of N fertilizer and multiple-weed interference on soybean (Glycine max) yield and to model these effects. Soybean yield loss caused by the interference of multiple weeds including common ragweed (Ambrosia artemisiifolia), barnyard grass (Echinochloa crus-galli), and American slough grass (Beckmannia syzigachne) at different levels of N fertilizer was accurately described by a combined model incorporating inverse quadratic and exponential models into the rectangular hyperbolic model for two parameters Y0 and β, respectively. The combined model used in our study indicated that the application of N up to 36 kg N ha−1 can increase weed-free soybean yield by 2.2 Mg ha−1 but soybean yield under multiple-weed interference can sharply decrease with increasing total density equivalent, particularly at 36 kg N ha−1. These results, including the combined model, thus can support decision making for weed management under different N uses in soybean cultivation.

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Section: Discussionmentioning

confidence: 99%

Modeling the Effects of Nitrogen Fertilizer and Multiple Weed Interference on Soybean Yield

Song

Kim

et al. 2021

Agronomy

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“…In poor soils, yields improve with the application of nutrients, especially nitrogen, phosphorus and potassium, which clearly promote plant growth. However, some authors indicate that such applications benefit weeds more so than crops, increasing the farmers' negative impact [11]. In situations in which nutrient supply is limited, some weeds can absorb greater quantities of nitrogen.…”

Section: Factors Involved In Competition Between Crops and Weedsmentioning

confidence: 99%

The Competitive Ability of Weed Community with Selected Crucifer Oilseed Crops

Santín-Montanyá¹,

Andres²,

EncarnaciónZambrana³

et al. 2015

Herbicides, Agronomic Crops and Weed Biology

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Dedicated production of energy crops on agricultural land is expected to be a crucial source of biomass to be exploited in order to achieve the renewable energy targets in the European Union. Vegetable oils are the main source for the production of biofuel; therefore, an alternative is to use oils from non-food oilseed crops. Oilseed crops examples include rapeseed, crambe and camelina.Most oilseed crops are considered minor crops and have received much less research attention in numerous areas, including agronomy, development of weed management strategies and determination of environmental benefits and production challenges.The use of these crops may be positive when all the benefits to the cropping system (mainly in terms of soil coverage and inhibition of weeds emergence) are considered.The strongly competitive cultivars and appropriate fertilisation are strategies used to develop appropriate integrated weed management systems. However, currently, there are few data on evaluation of oilseed competition with weed community in a semiarid climate.We conducted one study aimed at assessing the weed community in five oilseed crops: three rapeseed species (Brassica carinata A. Braun., Brassica juncea L. and Brassica nigra L.), crambe (Crambe abyssinica Hochst. ex R.E. Fries) and Camelina sativa (L.) Crantz. Seed yields, yield components and plant height of each oil seed species were recorded. We evaluate these species in two irrigation levels (fully irrigated and without irrigation) and three nitrogen fertiliser doses: 0, 75 and 150 kg N ha -1 .

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“…Water greatly affects sterile oat growth and development [14]. Recent research on weeds in response to climate change has suggested that focusing on drought-resistant weed biotypes is of great importance [15], as the different responses of herbicide-resistant and susceptible biotypes of a weed species to climatic changes may influence their fitness and population dynamics [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Performance of ACCase-Resistant and ACCase-Susceptible Phenotypes of Sterile Oat Avena sterilis subsp. ludoviciana (Durieu) Nyman under Drought Conditions in the Greenhouse

Naderi,

Bijani,

Chauhan

et al. 2024

Agronomy

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Climate change might benefit water-stress-adapted weeds, further impairing their management. To evaluate the impact of soil moisture regimes on the growth and reproductive behaviour of ACCase-resistant and ACCase-susceptible phenotypes of sterile oat (Avena sterilis subsp. ludoviciana (Durieu) Nyman), a greenhouse experiment was carried out in 2020 and 2021. The factors were soil moisture regimes (100% field capacity (FC) as well-watered, 75% FC, 50% FC, and 25% FC) and ACCase-resistant and ACCase-susceptible phenotypes of sterile oat. Increased drought stress conditions reduced the number of tillers per plant by 34, 55, and 83% and the number of seeds per plant by 36, 61, and 89% in the 75% FC, 50% FC, and 25% FC conditions, respectively, compared to the well-watered treatment. Notably, both phenotypes reacted similarly to water stress, with no interactions between the two factors. Regardless of water stress, the resistant phenotypes produced fewer seeds per plant, indicating fitness costs. However, due to their high plasticity, both phenotypes will still produce seeds even when facing severe water stress conditions. Thus, sterile oat is expected to continue infesting crop fields in the near future, but with ACCase-resistant phenotypes being less successful than susceptible ones in the absence of herbicide application.

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Effects of different densities of wild oat (Avena fatua L.) and nitrogen rates on oilseed rape (Brassica napus L.) yield

Cited by 5 publications

References 21 publications

Modeling the Effects of Nitrogen Fertilizer and Multiple Weed Interference on Soybean Yield

Modeling the Effects of Nitrogen Fertilizer and Multiple Weed Interference on Soybean Yield

The Competitive Ability of Weed Community with Selected Crucifer Oilseed Crops

Performance of ACCase-Resistant and ACCase-Susceptible Phenotypes of Sterile Oat Avena sterilis subsp. ludoviciana (Durieu) Nyman under Drought Conditions in the Greenhouse

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