PJB-2022-561
Estimation of Nitrogen Use Efficiency in Wheat Using CERES-Wheat Model under Multan Conditions
Attiq Ur Rehman
Abstract
Owing to urbanization and climatic changes, food security will be a terrible threat in future and excessive N application for food production will lead to poor NUE and wheat productivity in future century. Furthermore, the losses of nutrients particularly of nitrogen have increased owing to present changes in climatic conditions. To access the impact of excessive N application on NUE and wheat yield, a drop experiment was conducted different levels of N fertilizers in the presence and absence of crop residue mixing in the soil. There were 08 N levels (0, 94, 104, 117, 130, 143, 157.3 and 176 kg N ha-1 with and without crop residue mixing. The study was implemented by using two factorial RCBD while each treatment was repeated four replications. The results signposted that N + CR increased height by 15%, fertile tillers by 23%, spike length by 18%, grains per spike by 23%, 1000 grain weight by 29%, chlorophyll content by 17%, photosynthetic rate by 41%, water use efficiency by 5%, transpiration rate by 8%, stomatal conductance by 32%, biological yield by 11% and grain yield by 18%. It was found that application of N fertilizers with crop residue improved ARE of N, P and K i.e. NRE by 200%, PRE by 133%, KRE by 134% as compared to application N without crop residue. Similar changes were also recorded for other forms of NUE, KUE and PUE.
To Cite this article:
Download
