Response of maize to different nitrogen sources and tillage systems under humid subtropical conditions

K. Shahzad*, A. Khan, J. Smith, M. Saeed, S. A. Khan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Tillage systems (minimum, conventional and deep) with different sources of nitrogen (bioslurry, poultry manure and chemical fertilizer) were studied through field experiments at Gujjar Seed and Nursery Farm, Haripur, Khyber- Pakhtunkhwa, Pakistan, for two consecutive years (2012-2013) in a randomized-complete-block-design with split plots and four replicates. The tillage systems were kept in main plots while nitrogen treatments with different combinations of chemical fertilizer, poultry manure and bioslurry were distributed in sub-plots. The results showed that deep tillage with 100% chemical fertilizer (135 kg N ha-1) produced maximum plant height, stem diameter, cob length, cob diameter and number of grain rows per cob. However, deep tillage with combined application of 50% chemical fertilizer (67.5 kg N ha-1), 25% poultry manure (1.9 t ha-1) and 25% bioslurry (2.1 t ha-1) produced maximum 1000 grain weight, biological yield, grain yield, plant nitrogen, phosphorous and potassium concentrations in maize shoot, and seed protein contents compared to other treatments. It is concluded that integrated use of bioslurry and poultry manure with a reduced rate of chemical fertilizer can improve maize productivity and reduce cost of chemical fertilizers. The results also suggest that, in this soil and climate, deep tillage is needed to maximise yield potential.

Original languageEnglish
Pages (from-to)189-197
Number of pages9
JournalJournal of Animal and Plant Sciences
Issue number1
Publication statusPublished - 1 Jan 2015

Bibliographical note

This manuscript is part of research work approved for Ph.D. thesis. The financial support required for carrying out this research work was funded by Higher Education Commission of Pakistan under “Indigenous 5000 Fellowship Programme” is highly acknowledged. We are also thankful to Research and Development Division, Pakistan Meteorological Department, Islamabad-Pakistan for providing the
climatic data of the experimental site.


  • Bioslurry
  • Humid subtropical conditions
  • Maize productivity
  • Poultry manure
  • Tillage systems


Dive into the research topics of 'Response of maize to different nitrogen sources and tillage systems under humid subtropical conditions'. Together they form a unique fingerprint.

Cite this