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Kaur, Charanjeet
- Effect of Straw Mulching and Herbicides on the Weed Density, Dry Matter Accumulation of Weeds and Chlorophyll Content in Maize (Zea mays L.)
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Authors
Affiliations
1 Department of Agronomy, Punjab Agricultural University, Ludhiana (Punjab), IN
2 Regional Research Station, Gurdaspur (Punjab), IN
1 Department of Agronomy, Punjab Agricultural University, Ludhiana (Punjab), IN
2 Regional Research Station, Gurdaspur (Punjab), IN
Source
International Journal of Agricultural Sciences, Vol 15, No 1 (2019), Pagination: 107-114Abstract
Field experiment was carried out during Kharif 2017 at Ludhiana and Gurdaspur to assess the weed density, DMA of weeds and chlorophyll content as influenced by straw mulching and herbicides in maize.Application of paddy strawmulch at 9.0 t ha-1 effectively controlled the density and DMA of grasses, broadleaf and sedges and resulted in significantly more leaf chlorophyll content in maize as compared to paddy straw mulch at 6.25 t ha-1 and no mulching. Pre-emergence application of atrazine at 1.0 kg ha-1 helped to manage density and DMA of grasses, broadleaf and sedges in comparison to atrazine at 0.8 kg ha-1 and unweeded check at 20 DAS. At 40 DAS of maize where maximum losses due to weeds occurred, the weeds were managed by post emergence application of tembotrione at 0.088 in combination with PSM 9.0 t ha-1which reduced the density and DMA of grasses, broadleaf and sedges in comparison to atrazine at 0.8 and 1.0 kg ha-1 and unweeded check, but were equally effective as compared to tembotrione at 0.110 kg ha-1 and weed free treatment. The data showed that application of 9.0 t ha-1mulch helped to reduce 20 per cent dose of atrazine and tembotrione for controlling weeds in maize.Keywords
Atrazine, Maize, Straw Mulching, Tembotrione, Weed Density, Weed Dry Matter Accumulation.References
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- Soil Temperature, PAR Interception and Crop Phenology of Maize (Zea mays L.) as Influenced by Straw Mulching and Herbicides
Abstract Views :229 |
PDF Views:0
Authors
Affiliations
1 Department of Agronomy, Punjab Agricultural University, Ludhiana (Punjab), IN
2 Regional Research Station, Gurdaspur (Punjab), IN
1 Department of Agronomy, Punjab Agricultural University, Ludhiana (Punjab), IN
2 Regional Research Station, Gurdaspur (Punjab), IN
Source
International Journal of Agricultural Sciences, Vol 15, No 1 (2019), Pagination: 129-136Abstract
A multi location experiment was conducted at Punjab Agricultural University, Ludhiana and Regional Research Station Gurdaspur (PAU) during Kharif 2017 to evaluate the effect of straw mulching and herbicides on soil temperature, PAR interception and crop phenology of maize. Application of mulch at 9.0 t ha-1 helped to reduce the soil temperature at 5 cm soil depth by 3.8 to 4.6°C at 20 DAS, 1.0 to 1.4°C at 40 DAS, 1.0 to 1.3°C at 60 DAS and 0.7 to 1.2°C at harvest as compared to no mulch treatment, but at 10 cm soil depth the temperature was reduced by 2.2 to 3.7°C at 20 DAS, 1.3°C at 40 DAS, 0.5°C at 60 DAS and 0.4°C at harvest at both the locations. High values of PAR interception and less number of days taken to tasselling, silking and physiological maturity were recorded with application of PSM 9.0 t ha-1 as compared to PSM 6.25 t ha-1 and no mulching treatments. Mulch application at 6.25 t ha-1 also significantly lowered the soil temperature and resulted in significantly higher PAR interception and less number of days to tasselling, silking and physiological maturity as compared to no mulch treatment. Different weed control treatments did not significantly influence the emergence of maize and soil temperature at 5 cm and 10 cm depth at both the locations. Application of tembotrione at 0.088 kg ha-1, tembotrione at 0.110 kg ha-1and weed free treatments recorded statistically similar but significantly higher values of PAR interception and less number of days for tasselling, silking and physiological maturity as compared to atrazine at 0.8 and 1.0 kg ha-1 and unweeded check.Keywords
Atrazine, Crop Phenology, Maize, PAR Interception, Soil Temperature, Straw Mulching, Tembotrione.References
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