Response of weeds and maize, Zea mays L., to some weed control treatments under different nitrogen fertilizer rates
2011
Soliman, I.E. | Gharib, A.R.C.
The weed control treatments were un-weeded (check), hand hoeing once at 18 days after- sowing (DAS), hand hoeing twice at 18 and 30 DAS, Acetochlor herbicide alone, Acetochlor herbicide + one hoeing at 30 DAS and Fluroxypyr herbicide alone, Fluroxypyr herbicide+ one hoeing at 30 DAS. The response of weed species at 50 and 65 days after sowing (DAS) were differed due to nitrogen rates. Dry weight (g m. 2) of broadleaf weeds was not influenced by nitrogen rate. However, increasing nitrogen rate up 140 kg N/faddan significantly reduced dry weight of grass and total weeds at 50 DAS in both seasons and at 65 DAS in the second season, only. Hand hoeing twice or one of two the herbicides (Acetochlor or Fluroxypyr) along with one hand hoeing resulted in the best controlling for broadleaf, grassy and total weeds at 50 and 65 DAS in both season. Whereas, these treatments suppressed dry weight of total weeds at least 81.2 % than un-weeded control. effects between nitrogen rates and weed con treatments on dry weight/plant, grain yield and some yield attribi were significant. The maximum values were obtained from p1 received 120 or 140 kg N/faddan and treated with hoeing twi Acetochlor + one hoeing or Fluroxypyr + one hoeing. It can be concluded that nitrogen rate 120 kg N per faddan as wt as weed control hoeing twice, Acetochlor or Fluroxypyr + one hoeing could be recommended for optimum weed control and grain yield of single hybrid maize cv. SC10 at Kafrelshiekh Governorate.
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