Seed yield and quality responses of oilseed crops to simulated nitrogen deposition: A meta‐analysis of field studies

Abstract

Oilseed crops are widely planted and are closely associated with human nutrition and health. Globally, increased nitrogen (N) deposition has a significant impact on agricultural production; however, in‐depth knowledge of oilseed crop yields and quality is still lacking. Here, we performed a global meta‐analysis from 128 published papers with 462 paired observations to evaluate the response of oilseed crop yields, yield composition, protein, and oil content to simulated N deposition. The meta‐analysis showed that simulated N deposition significantly increased oilseed crop yields in a dose‐dependent and duration‐dependent manner. The yield compositions were also changed by N deposition, where pod numbers per plant (PNP) and seed weights per pod were significantly increased. Interestingly, our analysis identified PNP as the key factor determining the oilseed crop yield response to simulated N deposition. Additionally, the form of N deposition had no striking influence on either yields or yield components, whereas differences in the sensitivity in rape responses reflected differences in crop species. In terms of oilseed crop quality, although simulated N deposition increased the seed protein content in a dose‐dependent manner, there was a significant negative impact on the seed oil content. Furthermore, this negative correlation between seed oil content and biomass under simulated N deposition implies adverse effects caused by a dilution effect. Overall, our results suggest discrete responses of oilseed crop yield, seed protein and oil content to simulated N deposition. This study has ecological and biological implications for oilseed crop yield and quality responses facing global N deposition.

The multifaceted roles of Arbuscular Mycorrhizal Fungi in peanut responses to salt, drought, and cold stress

“…With the publications of the IPCC 4 th and 5 th reports [14,15]; however, global climate change is strongly influencing the behavior of legumes in resistance to abiotic stress and eventually reducing the crop production [16][17][18]. As an important leguminous crop, peanut (Arachis hypogaea L.) is globally cultivated in most tropical, subtropical, and temperate regions, which adapts to a wide range of climatic and soil conditions [19][20][21]. Peanut is relatively sensitive to salt and drought stress [22,23].…”

Physiological, transcriptional and metabolomic evidence for arbuscular mycorrhizal fungi and Lactobacillus plantarum in peanut resistance to salinity stress

“…In the past decade, legume species have been increasingly adopted by farmers that grown in saline agriculture even though most legume crops are relative sensitive to salinity (Bruning & Rozema, 2013; Farooq et al, 2017; Zhao et al, 2022). The rhizobia‐legume symbiosis could potentially increase the availability of soil nitrogen while minimize the application of nitrogen fertilizer due to the nitrogen fixation effects (Considine et al, 2017; Ferguson et al, 2019; Si et al, 2022). Peanut ( Arachis hypogaea L.) is an outstanding representative of legume species existing worldwide, which is also a vital source of protein and vegetable oil for both humans and livestock (Duchene et al, 2017; Dwivedi et al, 2014; Xie et al, 2022).…”

Transcriptomic Analysis of the Reduction in Seed Oil Content through Increased Nitrogen Application Rate in Rapeseed (Brassica napus L.)

“…In addition to oil, protein is another important reserve in rapeseed seed cells. The relationship between the seed oil and protein content is negative [26,27]. Consequently, reductions in seed oil content are beneficial for increasing the seed protein content.…”

“…Consequently, reductions in seed oil content are beneficial for increasing the seed protein content. The protein content in crop tissues, including seeds, is closely associated with nitrogen supply [27,28]. As a result, with an increase in nitrogen fertilizer application, the seed oil accumulation is reduced, and the protein content is enhanced.…”