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Prof. Nasser Khamis Barakat El-Gizawy :: Publications:

Effect of Weed Control and N, K Fertilizers on Productivity of Onion (Allium cepa L.) and Associated Weeds under New Land Soils
Authors: H.M.A. Elian, G.A.Sary, A. Roshdy, N. Kh. El-Gizawy, M.R. Moshtohry and S.D.M. Eid 1
Year: 2016
Keywords: Tepraloxydim Pyraflufen-ethyl Pendimethalin Fluazifop-p-butyl Herbicides Onion Weed control treatments
Journal: American-Eurasian J. Agric. & Environ. Sci.
Volume: 16
Issue: 2
Pages: 348-356
Publisher: Not Available
Local/International: International
Paper Link:
Full paper Nasser Khamis Barakat El-Gizawy_21.pdf
Supplementary materials Not Available

Two field experiments were carried out at El-Ismailia Agricultural Research Station, Agricultural Research Center, Giza, Egypt during 2013/14 and 2014/15 seasons in the sandy soil under sprinkler irrigation system to study the effect of weed management and plant nutrition practices on weed biomass, growth characters and bulb yield of onion (Allium cepa L.). Weed management practices included eight weed control treatments i.e. (Pendimethalin, pyraflufen-ethyl, tepraloxydim, fluazifop-p-butyl) alone application of herbicides or combinations (pyraflufen-ethyl + tepraloxydim or + fluazifop-p-butyl), hand hoeing twice and unweeded check. The crop was fertilized with four levels of N, K fertilizers as follows (75 kg N + 25kg K, 75kg N+50 kg K, 150kg N+25 kg K and 150 kg N+50 kg K) and without fertilization by N and K under the recommended rate of super phosphate fertilizer (150 kg/faddan). The results indicated that weed management and N, K fertilizer levels had a significantly effect on dry weight of weeds and onion bulb yield. The best reduction of total dry weight of weed and bulb yield increase was obtained with spraying pendimethalin at 2 L/faddan (one faddan = 0.42ha) and Pyraflufen at 200 cm /faddan + Tepraloxydim at 600 cm /faddan. The best reduction percentage of total 3 3 weeds was 81.7% and 75.9% resulted from pendimethalin in 2013/14 and 2014/15, respectively, compared to unweeded check. The highest bulb yield/faddan (9.51 and 12.98 t/faddan) was obtained from weed control by pyraflufen-ethyl +tepraloxydim in the first and second season, respectively. Increasing level of fertilizer applications increased the dry weight of total weeds. Application of 150 kg N + 50 or 25 kg K/faddan significantly increased bulb yield by 88.6% in the first season and 57% in the second season. The interaction effect between the combination of pyraflufen–ethyl+ tepraloxydim or + fluazfop-p-butyl and 150 kg N + 50 kg K was most productive (13.73, 13.36 and 14.6, 14.1 t/faddan compared with unweeded check and without N, K fertilizer was 2.73 and 3.1 t/faddan in the 1 and 2 seasons, respectively

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