Effect of starter nitrogen on Striga incidence and maize grain yield in the sub-humid bimodal rainfall areas of Western Kenya
Ogendo, J. O.
Effect of starter nitrogen on Striga incidence and maize grain yield in the sub-humid bimodal rainfall areas of Western Kenya - Addis Ababa (Ethiopia) CIMMYT|EARO : 1999 - p. 194-195 - Printed
A study was conducted onfarm in Yala division, Siaya district, in 1996 and 1997 to determine the critical starter inorganic nitrogen rate for increased maize productivity under Striga hermonthica infestation. Starter N treatments were laid out in randomized complete blocks with three replicates per site. Results indicate that inorganic N applied at planting significantly (P<0.05) increased maize grain yields at one and three sites in 1996 and 1997 respectively. Application of 20 kg N/ha at planting increased maize grain yield by 2.4 t/ha at Marenyo in 1996 and by 2.5, 2.1 and 1.3 t/ha at Ulumbi, Jina and Lihanda respectively in 1997 compared to the unfertilized treatment. Increasing starter N rate to 40 kg/ha consistently gave higher grain yields than the unfertilized treatment at all sites during both seasons. Delaying N until 30 days after emergence (DAE) reduced maize grain yields at two sites in 1997 only. Applying N at planting or 30 DAE did not suppress Striga infestation during both seasons, However, the results of this study show that 40 kg/ha is the critical starter inorganic N rate required for increased and economic maize production in the Striga hermonthica infested areas of western kenya.
English
92-9146-065-6
Infestation
Inorganic fertilizers
Kenya
Maize
Nitrogen
Pest resistance
Striga hermonthica
Weeds
Zea mays
CIMMYT
633.15 / EAS No. 6
Effect of starter nitrogen on Striga incidence and maize grain yield in the sub-humid bimodal rainfall areas of Western Kenya - Addis Ababa (Ethiopia) CIMMYT|EARO : 1999 - p. 194-195 - Printed
A study was conducted onfarm in Yala division, Siaya district, in 1996 and 1997 to determine the critical starter inorganic nitrogen rate for increased maize productivity under Striga hermonthica infestation. Starter N treatments were laid out in randomized complete blocks with three replicates per site. Results indicate that inorganic N applied at planting significantly (P<0.05) increased maize grain yields at one and three sites in 1996 and 1997 respectively. Application of 20 kg N/ha at planting increased maize grain yield by 2.4 t/ha at Marenyo in 1996 and by 2.5, 2.1 and 1.3 t/ha at Ulumbi, Jina and Lihanda respectively in 1997 compared to the unfertilized treatment. Increasing starter N rate to 40 kg/ha consistently gave higher grain yields than the unfertilized treatment at all sites during both seasons. Delaying N until 30 days after emergence (DAE) reduced maize grain yields at two sites in 1997 only. Applying N at planting or 30 DAE did not suppress Striga infestation during both seasons, However, the results of this study show that 40 kg/ha is the critical starter inorganic N rate required for increased and economic maize production in the Striga hermonthica infested areas of western kenya.
English
92-9146-065-6
Infestation
Inorganic fertilizers
Kenya
Maize
Nitrogen
Pest resistance
Striga hermonthica
Weeds
Zea mays
CIMMYT
633.15 / EAS No. 6