The effect of nitrogen timing and rate on radiation interception, grain yield and grain quality in autumn sown oats

Split nitrogen fertilizer application improved grain yield in winter wheat (Triticum aestivum L.) via modulating antioxidant capacity and 13C photosynthate mobilization under water-saving irrigation conditions

“…In this study, as basal or topdressing nitrogen fertilizer increased, wheat plants showed an increase in vegetative dry matter accumulation and a decrease in dry matter allocation to spikes. These effects negatively affected dry matter accumulation in the grain at grain-filling stage, which led to a reduced dry matter accumulation in the grain at maturity (Finnan et al 2019). However, it is noteworthy that the N3 treatment not only increased the amount of photosynthesis assimilates produced in the post-anthesis period, but also promoted the post-anthesis translocation of carbohydrates from the vegetative organs to the grains as well, thus, further supporting the notion that equal ratio treatments (such as that of N3) can increase grain yield under conditions of water-saving irrigation.…”

Assessing the impact of nitrogen supplementation in oats across multiple growth locations and years with targeted phenotyping and high-resolution metabolite profiling approaches

“…Proper management of nitrogen inputs is critical to optimize both crop yield and quality. However, the effect of nitrogen application on oat development, grain yield and quality, are poorly understood compared to in wheat and barley ( Finnan, Burke, & Spink, 2019 ). Nitrogen fertilisation impacts on a number of agronomic traits in oats including plant height, grain yield and milling quality ( Givens et al, 2004 , Browne et al, 2006 , Ma et al, 2017 ).…”

September 2020

“…The authors found no significant differences in grain yield in the treatment they used. The studies conducted with white oats indicate a trend for increase of productivity as the N rate increased, as observed by Kolchinski and Schuch (2003) and Finnan et al (2019). However, it should be emphasized that the results indicate the response of plants to nitrogen depends on environmental conditions and genotype tested.…”

“…Hectoliter weight is an important parameter in the marketing of oat grains and it is closely related to the proportion of caryopsis and bark (dehulling index). According to Finnan et al (2019) the hectoliter weight value may increase, if N is applied at 30-32 plant stage. Also, according to Tavares et al (2014), hectoliter weight trait varies strongly according to environmental conditions, a fact which may explain the lack of response of cultivars to rates and application times of N in the plant.…”

“…A management strategy previously studied in other crops is N application at the reproductive stage of the crop, with the aim of increasing the grain quality. As N uptake depends on the growth rate of tissues, strategies to increase biomass before anthesis may represent a mechanism to increase the protein content of grains without restriction to grain yield (Finnan et al, 2019). Several studies have related N availability to increase protein and grain quality of wheat (Stefen et al, 2014;Rial-Lovera et al, 2016), maize (Nelson et al, 2009) and rice (Mingotte et al, 2015).…”