Optimizing nitrogen fertilizer inputs and plant populations for greener wheat production with high yields and high efficiency in dryland areas

Li, Chao; Wang, Xingshu; Guo, Zikang; Huang, Ning; Hou, Saibin; He, Gang; Batchelor, William D.; Siddique, Kadambot H. M.; Wang, Zhaohui; Zhang, Di

doi:10.1016/j.fcr.2021.108374

Cited by 16 publications

(7 citation statements)

References 67 publications

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“…Too much nitrogen can lead to nitrate accumulation the leaching losses from the soil and nitrous oxide emissions [29,30]. Too little nitrogen not only leads to the degradation of protein, nucleic acid, and phospholipid synthesis, inhibits chlorophyll formation, but also leads to stunted plant growth, in which leaves become smaller and thinner leaves, incomplete fruits and seeds development, and ultimately leads to lower plant yields [31,32]. In this study, it was found that increased nitrogen application inhibited the synthesis of SSC and affected the content of organic acids (Table 2).…”

Section: Discussionmentioning

confidence: 99%

Determination of soluble solids content and organic acid content in tomatoes with different nitrogen levels based on hyperspectral imaging technique

Zhang,

Ma,

Zhang

et al. 2023

Preprint

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Tomato is sweet and sour and has high nutritional value. Soluble solids content (SSC) and organic acid content are important quality indexes of tomato fruit. The exogenous supply of different forms of nitrogen can have different effects on plant growth and development and physiological and metabolic processes because of the different mechanisms of nitrogen uptake and assimilation in plants. In the paper, different concentrations of nitrogen were used to study tomatoes' physical and chemical characteristics and appearance. Hyperspectral imaging (HSI) technology was employed to predict tomatoes' SSC and acid content. Competitive adaptive reweighed sampling (CARS), uninformative variable elimination (UVE),variable combination population analysis (VCPA), iteratively retaining informative variables (IRIV), and interval variable iterative spatial shrinkage analysis (IVISSA) were used to extract the feature wavelengths. Based on the characteristic wavelength, the prediction models of tomato SSC and organic acid content were established by partial least squares regression (PLSR), multiple linear regression (MLR) and principal component regression (PCR). Then a custom convolutional neural network (CNN) model was constructed and optimised. The results showed that the SSC of tomato was negatively correlated with nitrogen fertilizer concentration, and the highest organic acid content was recorded under the T4 treatment. For tomatoes treated with different nitrogen concentrations, the CARS-PLSR model showed the best results for tomato SSC, with RC and RP of 0.8589 and 0.8499 and RMSEC and RMSEP of 0.3180 and 0.3407. The IRIV-PCR model for organic acids was the best, with RC and RP reaching 0.8011 and 0.7760 and RMSEC and RMSEP reaching 0.6181 and 0.7055. Among all the models, the performance obtained by the CNN model was satisfactory. This study provides technical support for future online nondestructive testing of tomato quality.

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Section: Discussionmentioning

confidence: 99%

Determination of soluble solids content and organic acid content in tomatoes with different nitrogen levels based on hyperspectral imaging technique

Zhang,

Ma,

Zhang

et al. 2023

Preprint

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“…The large amount of residual nitrate nitrogen in farmland is related to the long-term large-scale fertilization and the pursuit of high yield [40]. Nonetheless, over-irrigation is also an important factor that causes high nitrate nitrogen residue [41].…”

Section: Discussionmentioning

confidence: 99%

Optimized Border Irrigation Improved Nitrogen Accumulation, Translocation of Winter Wheat and Reduce Soil Nitrate Nitrogen Residue

Yan

Zhang

2022

Agronomy

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We aimed to optimize field border length in the Huang-Huai-Hai Plain of China (HPC) to reduce soil inorganic nitrogen residues and increase nitrogen absorption and utilization by wheat plants using a traditional border irrigation system. In a two-year experiment (2017–2019) conducted in the HPC, four border lengths were tested: 20 m (L20), 30 m (L30), 40 m (L40), and 50 m (L50). Supplementary irrigation was implemented during jointing and anthesis stages, and control fields received treatment without irrigation. The results showed that, compared with irrigation of other border lengths, L40 irrigation significantly increased nitrogen transport in stems and leaves. In addition, L40 irrigation had the highest rate of grain nitrogen accumulation after anthesis. The risk of nitrate leaching to deep layers increased with increasing border length; however, L40 irrigation improved the plants’ capacity to absorb soil nitrogen, and the soil inorganic nitrogen residue was significantly lower than that with irrigation of other border lengths. Therefore, the grain yield and nitrogen fertilizer utilization under L40 irrigation were significantly higher than those under irrigation of other border lengths, and L40 was considered as the best border irrigation length.

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“…The crop quality and yield can be enhanced by using considerable amount of N fertilizers. However, in many condition desired yield not achieved due to N deficiency like abiotic stress [215,216]. In many cases, most fraction of applied N is lost which enforced pressure on the farmers to achieve maximum crop production [217].…”

Section: Significances Of Silicon In the Uptake Of Nutrientsmentioning

confidence: 99%

Impact of Silicon on Plant Nutrition and Significance of Silicon Mobilizing Bacteria in Agronomic Practices

Raza

Abbas

Amna

et al. 2023

Silicon

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Globally, rejuvenation of soil health is a major concern due to the continuous loss of soil fertility and productivity. Soil degradation decreases crop yields and threatens global food security. Improper use of chemical fertilizers coupled with intensive cultivation further reduces both soil health and crop yields. Plants require several nutrients in varying ratios that are essential for the plant to complete a healthy growth and development cycle. Soil, water, and air are the sources of these essential macro- and micro-nutrients needed to complete plant vegetative and reproductive cycles. Among the essential macro-nutrients, nitrogen (N) plays a significant in non-legume species and without sufficient plant access to N lower yields result. While silicon (Si) is the 2nd most abundant element in the Earth’s crust and is the backbone of soil silicate minerals, it is an essential micro-nutrient for some plants. Silicon is just beginning to be recognized as an important micronutrient to some plant species and, while it is quite abundant, Si is often not readily available for plant uptake. The manufacturing cost of synthetic silica-based fertilizers is high, while absorption of silica is quite slow in soil for many plants. Rhizosphere biological weathering processes includes microbial solubilization processes that increase the dissolution of minerals and increases Si availability for plant uptake. Therefore, an important strategy to improve plant silicon uptake could be field application of Si-solubilizing bacteria. In this review, we evaluate the role of Si in seed germination, growth, and morphological development and crop yield under various biotic and abiotic stresses, different pools and fluxes of silicon (Si) in soil, and the bacterial genera of the silicon solubilizing microorganisms. We also elaborate on the detailed mechanisms of Si-solubilizing/mobilizing bacteria involved in silicate dissolution and uptake by a plant in soil. Last, we discuss the potential of silicon and silicon solubilizing/mobilizing to achieve environmentally friendly and sustainable crop production.

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Optimizing nitrogen fertilizer inputs and plant populations for greener wheat production with high yields and high efficiency in dryland areas

Cited by 16 publications

References 67 publications

Determination of soluble solids content and organic acid content in tomatoes with different nitrogen levels based on hyperspectral imaging technique

Determination of soluble solids content and organic acid content in tomatoes with different nitrogen levels based on hyperspectral imaging technique

Optimized Border Irrigation Improved Nitrogen Accumulation, Translocation of Winter Wheat and Reduce Soil Nitrate Nitrogen Residue

Impact of Silicon on Plant Nutrition and Significance of Silicon Mobilizing Bacteria in Agronomic Practices

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