Improving nitrogen use efficiency of rice crop through an optimized root system and agronomic practices

Zhang, Hao; Zhang, Jianhua; Yang, Jianchang

doi:10.1016/j.crope.2023.10.001

Cited by 9 publications

(4 citation statements)

References 102 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Root morphology and spatial distribution directly influence a plant's acquisition of soil resources such as nutrients and water [32,33]. Appropriate water and N management can optimize root architecture and improve root activity to enhance rice's uptake of nutrient resources [34]. In our study, we found that aboveground biomass and shallow and deep root biomass in rice were significantly higher under the DIO compared to the DIS (Figure 5).…”

Section: Discussionmentioning

confidence: 57%

“…These results suggest that further limited water irrigation in drip-irrigated rice negatively impacts root growth, N uptake, transport, and yield formation. Meanwhile, many N management strategies for increasing grain yield and NUE in rice production have been developed by researchers and adopted by farmers, such as balanced fertilization, integrated nutrient management, soil testing and formulated fertilization, site-specific nutrient management, deep and side application of N fertilizer, delayed N application at a later growth stage, and integrated water and N management [34,38,39]. Therefore, proper N management can improve rice root growth to attain more N nutrition and subsequently enhance rice yield.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Soil Nitrogen Distribution Affects Nitrogen Utilization and Yield of Drip-Irrigated Rice

Li,

Yang,

Zhang

et al. 2024

Agronomy

View full text Add to dashboard Cite

The cultivation of drip-irrigated rice has resulted in lower yields. However, the decrease in rice yield under drip irrigation and its relationship with the existing water and N regime have not been fully explained. Research and development of optimized water and N-management techniques are crucial for increasing rice yield under drip irrigation. In this study, two irrigation treatments were set: conventional drip irrigation (DIO) and drip irrigation with water stress (DIS). Each irrigation treatment contained four N rates: urea N 240 kg ha−1 (LN), urea N 300 kg ha−1 (MN), urea N 360 kg ha−1 (HN), and ammonium sulfate N 300 kg ha−1 (AN). The soil’s ammonium and nitrate contents were measured on the 2nd and 28th days after N application at panicle initiation stage. At anthesis, the aboveground and root biomass of rice were measured. In heading and maturity stage the N content of aboveground was measured and the yield, yield components, and NPFP were assessed at maturity stage. The results showed the following: (1) On the second day after N application, the contents of soil NO3−-N and NH4+-N in the 0–10 cm soil layer were highest for both the DIO and DIS. On the 28th day after N application, the soil NO3−-N content was highest at the 20–40 cm depth, while the soil NH4+-N content was still highest at the 0–10 cm depth. (2) The aboveground and root biomass in DIO treatment were significantly higher than in DIS. Furthermore, the root biomass at the 0–10 cm depth was significantly greater than at the 10–50 cm depth for both the DIO and DIS treatments. In the DIO treatment, the root biomass at the 10–50 cm depth was significantly higher with the HN and AN treatments compared to MN. However, in the DIS treatment, the root biomass at the 10–50 cm depth did not show significant differences between the MN, HN, and AN. (3) N accumulation in rice was significantly higher for the DIO treatment compared to the DIS treatment. Under the same irrigation treatment, the N accumulation in rice was highest in the AN and lowest in the LN. The PrNTA and PrNTC in DIS were significantly higher than in DIO, while the PoNAA and PoNAC were significantly lower in DIS. (4) The number of panicles, spikelets per panicle, seed-setting rate, 1000-grain weight, and grain yield were significantly lower in DIS. Under the DIS, these parameters were not significantly different among the MN, HN, and AN. In the DIO, the seed-setting rate, 1000-grain weight, and yield were not significantly different between the HN and AN, but were significantly higher than in the MN and LN. (5) NPFP was significantly higher in the DIO compared to the DIS. Among the different N rates, NPFP was highest with the AN treatment and lowest with the LN. In summary, under drip irrigation, there was a mismatch between soil mineral N and the distribution of rice roots, leading to reduced N accumulation and utilization in rice, ultimately impacting yield formation. Increasing N application and soil ammonium nutrition can improve rice yield under drip irrigation. However, optimizing N fertilizer management may not increase rice yield further when irrigation is further limited.

show abstract

Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Soil Nitrogen Distribution Affects Nitrogen Utilization and Yield of Drip-Irrigated Rice

Li,

Yang,

Zhang

et al. 2024

Agronomy

View full text Add to dashboard Cite

show abstract

“…The content of non‐structural carbohydrates (NSC) was determined at HD, 10DAH, 20DAH and MT using the anthraquinone colorimetric method (Li et al., 2022). The NUE for grain production (NUEg), N harvest index (NHI), N recovery efficiency (RE), partial factor productivity of applied N fertilizer (PFP), agronomic efficiency (AE), physiological efficiency (PE), and traits related to translocation of N accumulated before flowering in the vegetative organs to grains were calculated according to previous studies (Huang et al., 2022; Zhang et al., 2023). NUEg (kg kg −1 ) = grain yield/total N uptake; NHI (%) = grain N content/total N uptake; RE (%) = (N uptake by plants in the fertilized treatment group – N uptake by plants in the unfertilized control group)/N application rate; PFP (kg kg −1 ) = grain yield/N application rate; AE (kg kg −1 ) = (grain yield in the N application plot – grain yield in the N‐free plot)/N application rate; PE (kg kg −1 ) = (grain yield in the N application plot – grain yield in the N‐free plot)/(N uptake by plants in the N application plot – N uptake by plants in the N‐free plot); Amount of N translocation (ANT) (t ha −1 ) = grain N content – (total N uptake at maturity – total N uptake at heading); Efficiency of N translocation (ENT) (%) = Pre‐flowering N translocation amount/total N uptake at heading × 100; Contribution of N translocation to grain yield (CNT) (%) = Pre‐flowering N translocation amount/grain yield. …”

Section: Methodsmentioning

confidence: 99%

“…The content of non-structural carbohydrates (NSC) was determined at HD, 10DAH, 20DAH and MT using the anthraquinone colorimetric method (Li et al, 2022). The NUE for grain production (NUEg), N harvest index (NHI), N recovery efficiency (RE), partial factor productivity of applied N fertilizer (PFP), agronomic efficiency (AE), physiological efficiency (PE), and traits related to translocation of N accumulated before flowering in the vegetative organs to grains were calculated according to previous studies (Huang et al, 2022;Zhang et al, 2023).…”

Section: Determination Of N and Non-structural Carbohydrates (Nsc) Co...mentioning

confidence: 99%

Agronomic and physiological characteristics of high yield and nitrogen use efficient varieties of rice: Comparison between two near‐isogenic lines

Li,

Zhang,

Zhou

et al. 2024

Food and Energy Security

View full text Add to dashboard Cite

Increasing the application of nitrogen fertilizer is the main approach to increase rice production, but it also brings problems of environmental pollution and increases agricultural production costs. Cultivating high‐yielding and high nitrogen use efficiency (NUE) rice varieties is an important approach to solving this problem. The rice varieties carrying dep1 (dense and erect panicle 1) have both high grain yield and high NUE. However, their plant traits have not been fully explored. In this study, two rice near‐isogenic lines carrying dep1 (NIL‐DEP1 and NIL‐dep1) were grown in paddy fields under 0, 120 and 270 kg N ha−1. We analyzed agronomic traits of panicle type, plant type, leaves and roots, and physiological traits of vascular bundles, photosynthetic rate and carbon and nitrogen transport. The results showed that the NIL‐dep1 exhibited higher grain yield and NUE than NIL‐DEP1, mainly due to the higher spikelet number per panicle, grain filling percentage and dry matter production. Compared with NIL‐DEP1, NIL‐dep1 had improved flag leaf morpho–physiological traits, including erect flag leaves, greater leaf thickness and specific leaf weight, higher root dry weight, root length, root volume and root surface area, and a better canopy structure, as reflected by a lower light interception percent and canopy extinction coefficient, leading to better photosynthetic performance and dry matter production. In addition, NIL‐dep1 exhibited better vascular bundle traits of peduncle and enhanced dry matter, stem carbon and nitrogen translocation during grain filling. In conclusion, NIL‐dep1 had high grain yield and NUE by improved agronomic and physiological traits and increasing carbon and nitrogen translocation during grain filling. These traits mentioned above could be used to select and breed high grain yield with high NUE rice varieties.

show abstract

Trait-Based Approaches to Improve Nutrient Uptake Efficiency in Crops

Joshi,

Maiti

2024

Plant Functional Traits for Improving Productivity

View full text Add to dashboard Cite

Improving nitrogen use efficiency of rice crop through an optimized root system and agronomic practices

Cited by 9 publications

References 102 publications

Soil Nitrogen Distribution Affects Nitrogen Utilization and Yield of Drip-Irrigated Rice

Soil Nitrogen Distribution Affects Nitrogen Utilization and Yield of Drip-Irrigated Rice

Agronomic and physiological characteristics of high yield and nitrogen use efficient varieties of rice: Comparison between two near‐isogenic lines

Trait-Based Approaches to Improve Nutrient Uptake Efficiency in Crops

Contact Info

Product

Resources

About