Himachal Journal of Agricultural Research

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Effect of Time and Method of Post-Emergence Application of Atrazine on Nutrients Depletion by Weeds in Maize


Affiliations
1 Department of Agronomy, Forages and Grassland Management, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
2 Department of Soil Science, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur -176 062, India
 

Fifteen weed control treatments comprising of atrazine 1.5&2.0 kg/ha spray and broadcast with sand on 7, 14 and 21 DAS; atrazine 1.5 kg/ha pre-emergence; farmer's practice and weedy check were evaluated for nutrients depletion by weeds in maize during kharif 2013 at Palampur. The soil of the test site was silty clay loam in texture, acidic in reaction, medium in organic carbon, low in N and K and medium in P. Echinochloa colona, Commelina benghalensis, Ageratum conyzoides, Cyperus sp., Digitaria sanguinalis and Panicum dichotomiflorum were the important weeds. Atrazine 2 kg/ha spray at 7 DAS and pre-emergence application of atrazine reduced N, P and K uptake by weeds over weedy check and also gave lowest weed dry weight. Grain yield of maize was also higher when atrazine 2 kg/ha was applied at 7 DAS by spraying and was at par with pre-emergence application of atrazine. Significantly lower N, P and K uptake by weeds was obtained with atrazine 2 kg/ha spray at 7 DAS.

Keywords

Atrazine, Dose, Time, Method, Weeds, Maize.
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  • Effect of Time and Method of Post-Emergence Application of Atrazine on Nutrients Depletion by Weeds in Maize

Abstract Views: 175  |  PDF Views: 5

Authors

M. C. Rana
Department of Agronomy, Forages and Grassland Management, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
Shivani Chand
Department of Agronomy, Forages and Grassland Management, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
S. S. Rana
Department of Agronomy, Forages and Grassland Management, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
Narendra Shankhyan
Department of Soil Science, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur -176 062, India

Abstract


Fifteen weed control treatments comprising of atrazine 1.5&2.0 kg/ha spray and broadcast with sand on 7, 14 and 21 DAS; atrazine 1.5 kg/ha pre-emergence; farmer's practice and weedy check were evaluated for nutrients depletion by weeds in maize during kharif 2013 at Palampur. The soil of the test site was silty clay loam in texture, acidic in reaction, medium in organic carbon, low in N and K and medium in P. Echinochloa colona, Commelina benghalensis, Ageratum conyzoides, Cyperus sp., Digitaria sanguinalis and Panicum dichotomiflorum were the important weeds. Atrazine 2 kg/ha spray at 7 DAS and pre-emergence application of atrazine reduced N, P and K uptake by weeds over weedy check and also gave lowest weed dry weight. Grain yield of maize was also higher when atrazine 2 kg/ha was applied at 7 DAS by spraying and was at par with pre-emergence application of atrazine. Significantly lower N, P and K uptake by weeds was obtained with atrazine 2 kg/ha spray at 7 DAS.

Keywords


Atrazine, Dose, Time, Method, Weeds, Maize.

References