Effect of 2,4-D on Carbohydrate and Nutrient-Element Content and on Rapidity of Kill of Soybean Plants Growing at Different Nitrogen Levels

Wolf, Dale E.; Vermillion, Gertrude; Wallace, A.; Ahlgren, Gilbert H.

doi:10.1086/335647

Cited by 23 publications

(6 citation statements)

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“…Similar results have been found in previous studies. Wolf et al. (1950), Pfeiffer and Holmes (1961) and McWhorter (1971) examined the effects of nitrogen, showing that it can increase the susceptibility of soyabean ( Glycine max (L.) Merr.…”

Section: Discussionmentioning

confidence: 99%

Modelling interactions between herbicide and nitrogen fertiliser in terms of weed response

Kim¹,

Marshall²,

Caseley³

et al. 2006

Weed Research

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The effects of nitrogen fertiliser on herbicide doseresponse of weeds were investigated by measuring weed biomass after growth at a range of nitrogen levels and treatment with a range of herbicide doses. Increasing weed biomass at no-herbicide treatment (W 0 ) and the response rate of the dose-response curve (B), with increasing nitrogen were successfully described by the linear model and the exponential model respectively. Conversely, decreasing ED 50 value with increasing nitrogen was well described by the logistic model. A combined model was then developed by incorporating these models into the standard dose-response model to describe the interactive effects of herbicide dose and nitrogen levels on biomass of Brassica napus, Matricaria perforata, Papaver rhoeas and Galium aparine. The model developed allowed the systematic description of increased herbicide performance with increasing nitrogen. The model was also used to predict weed biomass as affected by both herbicide doses and nitrogen levels. The mathematical relationships between herbicide dose-response and nitrogen levels may also be applied to the crop-weed competition model and then to decision making for optimum uses of nitrogen fertiliser and herbicide.

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Section: Discussionmentioning

confidence: 99%

Modelling interactions between herbicide and nitrogen fertiliser in terms of weed response

Kim¹,

Marshall²,

Caseley³

et al. 2006

Weed Research

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“…Dunphy and Hanway (1976), however, reported that the water-soluble carbohydrate concentration in the leaves increased during the growing season from 10 to 12% at 50 days after emergence to 15 to 17% when the leaves started to yellow. Wolf et a!. (1950) grew soybeans at three N levels and found that the medium N level resulted in the highest total sugars and starch concentration, while the concentration of reducing sugars was highest at the highest level of N. Ishizuka (1970) found, when applying N to soybean plants, that the total sugar content of the stem was lower than the control during vegetative growth; however, there was no difference after initial bloom.…”

mentioning

confidence: 99%

Influenced of N Nutrition on Total N, Nitrate, and Carbohydrate Levels in Soybeans¹

Breveden¹,

Egli²,

Leggett

1977

Agronomy Journal

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A better understanding of the effects of varying the N supply to the soybean (Glycine max (L.) Merrill) be obtained by studying, after treatment, the resultant changes in N and carbohydrate levels in the various plant parts. Greenhouse and field experiments were conducted to determine the effect of varying the N supply to the plant during flowering and pod‐filling on the dry weight, total N, NO3‐, and the total available carbohydrates. The greenhouse experiment was conducted in a gravel culture hydroponics system with 5 meq NO3‐/liter m the nutrient solution. Some plants were shifted to 12.5 and 18.0 meq NO3‐/liter at initial bloom and maintained at these levels until maturity, while others were exposed to the high NO3‐ levels only until the end of bloom. Treatments in the field consisted of 168 kg N/ha as NH4NO3 applied at initial bloom, at the end of bloom, or at both times (total of 336 kg N/ha). Increasing the N supply to the plant during the period from initial bloom increased the dry weight of the vegetative plant parts at the end of bloom and at mid‐podfill. The effect was much greater in the greenhouse than in the field. Increasing the N supply to the plant also increased the concentration of N and NO3‐ in the vegetative tissue at the end of bloom; differences in N and NO3‐ were also apparent at midpodfill although the magnitude was not so great. The concentration of total available carbohydrates in the vegetative tissue decreased when the N supply to the plant increased. Treatment effects were similar in the greenhouse (non‐nodulated) and in the field (nodulated) experiment. A previous paper reported that yield was increased by increasing the N supply to the plant during flowering and pod set, primarily as a result of an increase in seed number. The increase in yield was associated with increased tissue levels of N and NO3‐ and decreased levels of total available carbohydrates. The data demonstrate the importance of high tissue levels of N during the period of flowering and podset.

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“…In opposition to this line of thought, a number of investigators believe that death occurs before reserves are depleted (229,196).…”

Section: Effects Of Growth Regulators On Reserve Starchmentioning

confidence: 99%

“…Wolf et ale (229) found a strong interaction between the nitrogen level of the soil and the reaction of plants to 2,4-Do They said, "The 2, 4-D treated plants receiving high-nitrogen solutions were dead 14 days after the 2, 4-D treatment was begun. At this time the medium -nitrogen plants showed severe chlorosis of leaves and stems, and splitting of the stems, whereas the low-nitrogen plants showed only mild chlorosis. "…”

Section: Adjuvants Used With Growth Regulatorsmentioning

confidence: 99%

Control of woody weeds: some physiological aspects /

Woods¹

1955

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Effect of 2,4-D on Carbohydrate and Nutrient-Element Content and on Rapidity of Kill of Soybean Plants Growing at Different Nitrogen Levels

Cited by 23 publications

References 0 publications

Modelling interactions between herbicide and nitrogen fertiliser in terms of weed response

Modelling interactions between herbicide and nitrogen fertiliser in terms of weed response

Influenced of N Nutrition on Total N, Nitrate, and Carbohydrate Levels in Soybeans¹

Control of woody weeds: some physiological aspects /

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Effect of 2,4-D on Carbohydrate and Nutrient-Element Content and on Rapidity of Kill of Soybean Plants Growing at Different Nitrogen Levels

Cited by 23 publications

References 0 publications

Modelling interactions between herbicide and nitrogen fertiliser in terms of weed response

Modelling interactions between herbicide and nitrogen fertiliser in terms of weed response

Influenced of N Nutrition on Total N, Nitrate, and Carbohydrate Levels in Soybeans1

Control of woody weeds: some physiological aspects /

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Influenced of N Nutrition on Total N, Nitrate, and Carbohydrate Levels in Soybeans¹