Influence of Nitrogen Fertilizer Rate on Yield, Grain Quality and Nitrogen Use Efficiency of Durum Wheat (Triticum durum Desf) under Algerian Semiarid Conditions

Abstract

Nitrogen fertilizer application is conditioned closely by the amount of rainfall and its distribution. The current study aims at studying the effect of nitrogen (N) application rate on grain yield (GY), grain protein content (GPC), and nitrogen use efficiency (NUE) of durum wheat under Algerian semiarid conditions. Field trials were conducted during two contrasting and successive growing seasons (a dry year = 2016–2017 and a wet year = 2017–2018) on a local variety named Bousselam. A randomized complete block design (RCBD) was used with four replicates. Seven gradual treatments of fertilizer rate were studied: T1 = 0 unity of nitrogen (UN), T2 = 100 UN, T3 = 110 UN, T4 = 120 UN, T5 = 130 UN, T6 = 140 UN, and T7 = 150 UN. Results showed a significant difference between the dry and wet years. Only the GPC was higher in the dry year compared to the wet year having a difference of 2.94%. However, all other studied parameters were higher in the wet year, which resulted in a yield difference of 4.38 t ha−1. In addition, a significant effect of N rate on GY, thousand grain weight (TGW), and GPC was observed. A considerable difference between 120 UN and 150 UN was not noted in both years of study. Furthermore, the agronomic efficiency (AE) increased significantly with rainfall amount achieving a difference of 16.2 kg·kgN−1 between years. Finally, the results showed that using a high N amount led to a decrease in AE. Based on GY, apparent recovery efficiency (ARE), agronomic efficiency (AE), and marginal rate return (MRR) recorded in both years, the nitrogen application rate of 120 UN is recommended to be applied to wheat crops in Algerian semiarid conditions.

Continuous no‐tillage winter wheat response to nitrogen fertilizer by yield environment

“…Higher fertilizer rate in water‐limited environments bring N much closer to plant, which shortens the transport of nutrient (Obour et al., 2022). A significant dependence of wheat N response to precipitation reported here is in line with prior research reports on wheat and other cereal crops (Boulelouah et al., 2022; Obour et al., 2022).…”

“…Applying high fertilizer rates for low yields reduces winter wheat profitability in LY environments. One probable reason why the agronomic optimal rates are relatively greater in LY environments than in HY environments is that higher rate brings N much closer to plant, which shortens the transport of nutrient in water‐limited environments (Assefa et al., 2010; Boulelouah et al., 2022). The other possible reason for a relatively greater optimal fertilizer rate in low‐yield environments could be vulnerability to environmental losses due to prolonged dry spells (Whetton et al., 2022).…”

Study the Effect of Nitrogen Fertilization Rates on Grain Yield and Some Physiological Characteristics of Wheat Varieties

“…Only, N0 treatment with the second year had the lowest grain yield. These findings are in agreement with the results of Qadeer et al [7], Litke et al [31] and Boulelouah et al [35]. Generally, the grain yield increased in both years with the gradual increase in the N treatments (in the order N3 > N2 > N1 > N0), but the second year was higher than the first year.…”

Artificial Intelligence Integrated GIS for Land Suitability Assessment of Wheat Crop Growth in Arid Zones to Sustain Food Security

“…Similarly, elements that may be influenced by human management, such as drainage, irrigation, soil and water quality, soil fertility, and crop management [1], can also affect land sustainability. In certain wheat-growing regions, excessive nitrogen levels also caused a drop in agronomic productivity [18].…”