Optimization of plant density and nitrogen regimes to mitigate lodging risk in wheat. (11th May 2020)

• Record Type: Journal Article
• Authors: Khan, Aaqil; Ahmad, Akhlaq; Ali, Waqar; Hussain, Sajad; Ajayo, Babatope Samuel; Raza, Muhammad Ali; Kamran, Muhammad; Te, Xiao; al Amin, Noor; Ali, Siyad; Iqbal, Nasir; Khan, Imran; Sattar, Muhammad Tayyab; Ali, Asif; Wu, Yushan; Yang, Wenyu
• Is Part Of: Agronomy Journal. Volume 112:Number 4(2020)
• Page Start: 2535
• Page End: 2551
• Publication Date: 2020-05-11
• Subjects: Agronomy -- Periodicals; 630
• DOI: 10.1002/agj2.20211
• Languages: English
• ISSNs: 0002-1962

Abstract

Abstract: Influences of planting density and nitrogen rate have been investigated frequently in targeted wheat ( Triticum aestivum L.) research. Few studies have investigated interactions between these inputs. The objective was to determine the combine effect of N and seeding rates on culm morph‐physiological traits for lodging tolerance and grain yield. The experiment used a split‐split randomized block design using two wheat varieties 'AnNong0711' and 'YanNong19', split by four seeding (180, 240, 300, and 375 × 10 4 ha −1 ) and four N rates (0, 180, 240, and 300 kg ha −1 ). Lodging traits of plant height, culm height center of gravity, and internode length, increased ( p < .05) however, stem diameter, wall thickness, and stem breaking strength decreased with increasing N and seeding rate. Stem breaking strength was negatively correlated with culm height center of gravity ( r = −.869, p = .01), internode length ( r = −.872, p < .01), and lignin ( r = −.746, p < .01) but positively correlated with internode diameter ( r = .715, p < .05) and wall thickness ( r = .696, p < .05). Culm lodging index and cellulose showed positive correlation ( r = .807 and .913 respectively) with lignin. Compared to YanNong19, AnNong0711 showed higher grain yield and culm lodging index of 9 and 20.49%, respectively. For improved grain yield, 180 plants m −2 was optimal in surface combinations with 210 kg N ha −1 for AnNong0711 and 200 kg N ha −1 for YanNong19. These combinations of seeding and N rates could successfully mitigate lodging and improve grain yield.