Effects of Variable Nitrogen Source and Rate on Leaf Area Index and Total Dry Matter Accumulation in Maize (Zea mays L.) Genotypes under Calcareous So

Karacan, I; Ulular, Omer; Özışık, Kanat; Kzltepe, U¤ursay

doi:10.17557/tjfc.90307

Cited by 12 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Increase in maize productivity with nitrogen fertilization was also reported by many workers (Malaiya et al, 2004; Amanullah et al, 2009a, 2015b). The increase in yield and yield components in the current study with N supply probably may be due to the increase in light interception (Amanullah et al, 2008) because of it higher LAI (Amanullah et al, 2014). Many researchers reported improvement in maize yield and yield components while increasing N level.…”

Section: Discussionmentioning

confidence: 78%

“…The higher in yield and yield components of maize under higher N rates over the lower N rates was attributed to the increase in leaf area index (LAI) and total dry matter (TDM) accumulation (Amanullah et al, 2014), increase in NUE and harvest index (Amanullah, 2014). Hejazi and Soleymani (2014) reported that the N control treatment had the lowest yield components and grain yield than the N fertilized plots.…”

Section: Discussionmentioning

confidence: 99%

“…Hejazi and Soleymani (2014) reported that the N control treatment had the lowest yield components and grain yield than the N fertilized plots. Increase in yield components of maize in the N fertilized probably may be attributed to less competition among maize plants for nitrogen, and the plants therefore accumulated more biomass and partitioned more dry matter into the reproductive parts (ears) because of its higher LAI (Amanullah et al, 2014). The higher capacity of the plants to convert more photosynthates into the reproductive parts increases maize productivity.…”

Section: Discussionmentioning

confidence: 99%

“…The increase in yield and yield components with AS or CAN over urea may be attributed to the increase in LAI and total dry matter accumulation (Amanullah et al, 2014) and increase in N-use efficiency (Amanullah, 2014). According to the review of Chien et al (2011), ammonium sulfate is the best N-fertilizer source which contains frees sulfur and had many potential agronomic and environmental benefits over urea and ammonium nitrate.…”

Section: Discussionmentioning

confidence: 99%

“…According to the review of Chien et al (2011), ammonium sulfate is the best N-fertilizer source which contains frees sulfur and had many potential agronomic and environmental benefits over urea and ammonium nitrate. However, because of its (AS) highest N cost than the N cost of other N sources (CAN and urea), the small landholder can't afford to use AS for crop production (Amanullah et al, 2014). The higher transportation charges of AS is also more than urea and CAN (Amanullah et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

See 4 more Smart Citations

Nitrogen Source and Rate Management Improve Maize Productivity of Smallholders under Semiarid Climates

et al. 2016

View full text Add to dashboard Cite

Nitrogen is one of the most important factor affecting maize (Zea mays L.) yield and income of smallholders under semiarid climates. Field experiments were conducted to investigate the impact of different N-fertilizer sources [urea, calcium ammonium nitrate (CAN), and ammonium sulfate (AS)] and rates (50, 100, 150, and 200 kg ha−1) on umber of rows ear−1 (NOR ear−1), number of seeds row−1 (NOS row−1), number of seeds ear−1 (NOS ear−1), number of ears per 100 plants (NOEP 100 plants−1), grain yield plant−1, stover yield (kg ha−1), and shelling percentage (%) of maize genotypes “Local cultivars (Azam and Jalal) vs. hybrid (Pioneer-3025).” The experiment was conducted at the Agronomy Research Farm of the University of Agriculture Peshawar during summers of 2008 (year one) and 2010 (year two). The results revealed that the N treated (rest) plots (the average of all the experimental plots treated with N) had produced higher yield and yield components, and shelling percentage over N-control plots (plots where N was not applied). Application of nitrogen at the higher rate increased yield and yield components in maize (200 > 150 > 100 > 50 kg N ha−1). Application of AS and CAN had more beneficial impact on yield and yield components of maize as compared to urea (AS > CAN > urea). Hybrid maize (P-3025) produced significantly higher yield and yield components as well as higher shelling percentage than the two local cultivars (P-3025 > Jalal = Azam). Application of ammonium sulfate at the rate of 200 kg N ha−1 to hybrid maize was found most beneficial in terms of higher productivity and grower's income in the study area. For the two local cultivars, application of 150 kg N ha−1 was found more beneficial over 120 kg N ha−1 (recommended N rate) in terms of greater productivity and growers income.

show abstract

Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%