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Response of Rice and Associated Weeds to Bioregulator (Bio Horm) Spray and Weed Management in Salinity Soil
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Abstract: Two field experiments were conducted during the two successive seasons of 2007 and 2008 at the Agricultural Experimental Station of Agricultural Research Center, at EL-Serw, Damietta Governorate Egypt, to study the effect of the bio horm and weed control treatments (Bentazon, Pyrazosoulfuron, Fenoxaprop, Penoxsulam, Bentazon+Fenoxaprop, Bentazon+Penoxsulam, Pyrazosoulfuron+Fenoxaprop, Pyrazosoulfuron+Penoxsulam, twice hand weeding and un- weeded cheek ) on growth, yield, its components and NPK percentage in grains of direct seeded rice as well as associated weeds in salinity soils.
Results illustrated that application of bio horm increased fresh and dry weight of total weeds. Spraying bio horm after 50 days from sowing (DFS) markedly increased rice growth characters (plant height, number of productive tillers, fresh and dry weight of rice plants), yield and yield components (panicle length, number of panicles / m2, weight of 1000 grain, grain and straw yield ) and N,P and K % of grain rice, compared with untreated treatment.
All weed control treatments caused significant reduction on number, of fresh and dry weight of total weeds/m2 after 60 DFS in both seasons. Pyrazosoulfuron treatment gave the highest decrease in total number of weeds followed by Pyrazosoulfuron + Penoxsulam and Pyrazosoulfuron+Fenoxaprop treatments. Pyrazosoulfuron + Fenoxaprop treatment gave the highest decrease in total fresh weight of weeds followed by Bentazon + Penoxsulam, Pyrazosoulfuron and Pyrazosoulfuron + Penoxsulam, respectively in 2007 season. While, in the second season Pyrazosoulfuron treatment gave the lowest values of total fresh weight of weeds. Mean while, Bentazon + Penoxsulam was more effective than other treatments in reducing the dry weight of total weeds in both seasons.
All herbicidal treatments and hand weeding increased significantly growth, yield, yield components and chemical composition of grain rice . Bentazon + Penoxsulam was superior treatment for increasing number of productive tillers, number of panicles / m2, 1000- grain weight and grain yield as well as NPK percentage of rice grains in both seasons. Meanwhile, Bentazon + Penoxsulam was superior treatment in plant height, fresh and dry weight of whole plant, panical length and straw yield in the first season. While, Pyrazosoulfuron + Penoxsulam gave the highest increment in plant height, fresh and dry weight of whole plant and straw yield in the second season.
The interaction between bio horm and weed management treatment had significant effect on total fresh and dry weight of weeds, number of productive tillers and 1000 grain weight. Pyrazosoulfuron produced the maximum values of number of productive tillers when bio horm was used in the second season, while, application of Bentazon + Penoxsulam gave the highest values of 1000 grain weight when bio horm was used in the second season. It could be concluded that using the bioregulator (bio horm) resulted in increment of growth and productivity of rice crop under salinity soils. Using the combinations of herbicides caused more reduction of weeds and increased rice grain yield.
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| URL |
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| Publication year |
2010
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| Pages |
123-134
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| Availability location |
جامعة عين شمس
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| Availability number |
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| Organization Name |
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| serial title |
Arab Univ. J. Agric. Sci. Ain Shams Univ., Cairo
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| Author(s) from ARC |
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| External authors (outside ARC) |
إبراهيم محمد المتولي
مدينة مبارك للأبحاث العلمية معهد بحوث زراعة وتنمية الاراضى القاحلة
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| Agris Categories |
Weeds and weed control
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AGROVOC
TERMS |
Rice fields.
Weed control.
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| Proposed Agrovoc |
biohorm;grain yield;straw yield;
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| Publication Type |
Journal
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