Estimates of Environmental Conditions of Soils in Plovdiv Region in Applying the New Herbicides for Weed Control in Major Field Crops

Popova, R.; Zhalnov, Ivan; Valcheva, Ekaterina; Zorovski, Plamen; Dimitrova, M.

doi:10.5513/jcea01/13.3.1096

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…Content of available nitrogen, phosphorus and potassium in the soil layers 0-30 and 30-60 cm. Year Nmin, mg.kg -1 P 2 О 5 , mg.100 g -1 K 2 О, mg.100 g -1 0-30 cm 30-60 cm 0-30 cm 30-60 cm 0- The soil type of the experimental field is alluvial-meadow Mollic Fluvisols (FAO, 2006) with slightly alkaline reaction pH H2O =7.80 and content of organic matter 1.3% (Popova et al, 2012). The content of available nutrients in the soil before sowing of the sorghum was determined in soil layers 0-30 and 30-60 cm (Table 1).…”

Section: Methodsmentioning

confidence: 99%

Uptake and Expense of Nitrogen, Phosphorus and Potassium in Grain Sorghum Depends on Nitrogen Fertilization

Velinov¹,

Todorov²,

Kostadinova³

2020

AGR

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The uptake and expense of nitrogen, phosphorus and potassium in grain sorghum was studied in a field experiment during the period 2017-2018. Hybrid EC Alize was grown under non-irrigated conditions. The applied nitrogen fertilization was in rates 0, 60, 120, 180, 240 and 300 kg N.ha-1. It was established that application of N240 and N300 let to high average uptake of nitrogen (212.0 kg N.ha-1) and phosphorus (125.2 kg P2O5.ha-1) in maturity. The higher removal of 159.9 kg K2O.ha-1 on average was observed at N180 rate. The expense of nitrogen for production of 1 t of grain increased in parallel with the nitrogen fertilization. The highest nitrogen expense of 39.7 - 45.3 kg N.t-1 grain was established when sorghum received 300 kg N.ha-1 and it exceeded the control by 38.8 in 2017 and by 53.6% in 2018. Sorghum plants used 15.5 - 16.6 kg P2O5 an average to form 1 t of grain and nitrogen fertilization in rates N60-N300 slightly affected the phosphorus expense. Nitrogen fertilization proven increased the expense of potassium for production of 1 t of grain compared to N0 control plants. The increase was by 8.3 -20.0% in 2017 and by 8.0 - 34.0% in 2018. Sorghum plants expensed 23.2 - 24.2 kg K2O on average to form 1 t of grain at nitrogen rates N180-N300. The strong positive correlation was established between nitrogen fertilization with N uptake (0.966**) and N expense (0.997**) and K uptake (0.820*) and K expense (0.870*).

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Section: Methodsmentioning

confidence: 99%

Uptake and Expense of Nitrogen, Phosphorus and Potassium in Grain Sorghum Depends on Nitrogen Fertilization

Velinov¹,

Todorov²,

Kostadinova³

2020

AGR

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“…Insufficient information about the effects of imazamox drift on maize plants motivated us to conduct a study aimed to: (1) establish chronic and lethal doses of imazamox treatment on young maize plants; (2) the longterm effect of imazamox-induced chronic phytotoxicity on both photosynthetic performance and yield of maize as well as (3) evaluate the efficiency of foliar application by protein hydrolysates as therapy means. The soil of the Experimental field is classified as Mollic Fluvisols (Popova et al, 2012). The mechanical composition is average sandy-clay, not high humus content, and weak-alkaline reaction (pH H 2 O = 7.3).…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic performance and productivity of maize (Zea mays L.), exposed to simulated drift of imazamox and subsequent therapy application with protein hydrolysates

Balabanova¹,

Neshev²,

Yanev³

et al. 2023

JCEA

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The use of herbicides is а traditional method for weed control in crop-producing systems. Along with the high effective weed control, herbicides might cause phytotoxicity for crop plants, due to insufficient herbicide selectivity, combining herbicide treatment with unsuitable meteorological conditions, long-term persistence of herbicide in the soil or off-target transfer of the herbicide -drift. Imazamox is a selective herbicide of imidazolinone group, used to control annual and perennial weeds in imidazolinone-resistant (IMI-R) crops. Protein hydrolysates (PHs) are a group of plant biostimulants containing small peptides and free amino acids, reported to ameliorate plant abiotic stress tolerance, including herbicide phytotoxicity. This report evaluates the damaging effect of simulated imazamox drift on growth, photosynthetic performance and productivity of maize plants as well as the efficiency of foliar application by protein hydrolysates as therapy means. The received results demonstrated that the simulated imazamox herbicide drift has a strong inhibiting effect on maize plants. This is well illustrated by the retarded growth of maize plants, their disrupted photosynthetic activity and productivity losses. The foliar supply of PHs to imazamox damaged maize plants ameliorates their photosynthetic performance, growth and crop productivity.

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Estimates of Environmental Conditions of Soils in Plovdiv Region in Applying the New Herbicides for Weed Control in Major Field Crops

Abstract: In connection with the conduction of field experiments to evaluate new complex herbicides for weed control in corn, wheat and winter rape, analyzes of some soil parameteres were carried out in order to trace their dynamics as a result of cultivation and application of herbicides.

Cited by 2 publications

References 3 publications

Uptake and Expense of Nitrogen, Phosphorus and Potassium in Grain Sorghum Depends on Nitrogen Fertilization

Uptake and Expense of Nitrogen, Phosphorus and Potassium in Grain Sorghum Depends on Nitrogen Fertilization

Photosynthetic performance and productivity of maize (Zea mays L.), exposed to simulated drift of imazamox and subsequent therapy application with protein hydrolysates

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