Effects of nitrogen addition on photosynthetic characteristics of Leymus chinensis in the temperate grassland of Nei Mongol, China

Zhan-Wei, Zhai; Gong, Jirui; Qin-Pu, Luo; Yan, Ping; Baoyin, Taogetao; Xu, Sha; Liu, Min; Li-Li, and Yang

doi:10.17521/cjpe.2016.0128

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Numerous studies have been conducted on nitrogen (N) as a principal limiting factor in the growth and development of most plants ( Amanullah et al, 2016 ; Wang et al, 2018b ). For perennial forage grass, nitrogen fertilization increases seed yield across different plant ages ( Zhang, Li & Li, 2001 ; Li et al, 2012 ; Pei-Sheng et al, 2001 ). Accordingly, N application is widely used in seed production and stands as one of the key factors influencing both seed quality and yield.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen addition enhances seed yield by improving soil enzyme activity and nutrients

Mi,

Luo,

Liu

et al. 2024

PeerJ

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Nitrogen (N) addition is a simple and effective field management approach to enhancing plant productivity. Nonetheless, the regulatory mechanisms governing nitrogen concentrations and their effect on soil enzyme activity, nutrient levels, and seed yield in the Festuca kirilowii seed field have yet to be elucidated. Therefore, this study sought to investigate the effect of N fertilizer application on soil enzyme activities, soil nutrients, and seed yield of F. kirilowii Steud cv. Huanhu, the only domesticated variety in the Festuca genus of the Poaceae family, was investigated based on two-year field experiments in the Qinghai–Tibet Plateau (QTP). Results showed that N input significantly affected soil nutrients (potential of hydrogen, total nitrogen, organic matter, and total phosphorus). In addition, soil enzyme activities (urease, catalase, sucrase, and nitrate reductase) significantly increased in response to varying N concentrations, inducing changes in soil nutrient contents. Introducing N improved both seed yield and yield components (number of tillers and number of fertile tillers). These findings suggest that the introduction of different concentrations of N fertilizers can stimulate soil enzyme activity, thus hastening nutrient conversion and increasing seed yield. The exhaustive evaluation of the membership function showed that the optimal N fertilizer treatment was N4 (75 kg·hm−2) for both 2022 and 2023. This finding provides a practical recommendation for improving the seed production of F. kirilowii in QTP.

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Section: Introductionmentioning

confidence: 99%

Nitrogen addition enhances seed yield by improving soil enzyme activity and nutrients

Mi,

Luo,

Liu

et al. 2024

PeerJ

View full text Add to dashboard Cite

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Morphological and physiological responses of critically endangered Acer catalpifolium to nitrogen deposition levels

Zhang

Cheng

Sha

et al. 2023

Global Ecology and Conservation

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Leaf Carbon Exchange of Two Dominant Plant Species Impacted by Water and Nitrogen Application in a Semi-Arid Temperate Steppe

2022

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Photosynthetic characteristics are widely used as indicators of plant responses to global environmental changes such as precipitation change and nitrogen (N) deposition increase. How different plant species respond physiologically to the future precipitation change combined with increasing N availability is largely unclear. A field experiment was conducted to study responses in seasonal and interannual leaf carbon (C) exchange of two dominant plant species, Leymus chinensis and Stipa grandis, to additional water (either as spring snow or as summer water) and N application in a semi-arid temperate steppe of China. Our results showed that spring snow and summer water addition both increased the maximum photosynthetic rate (Amax) of two dominant species. Such effect was likely caused by raised light saturation point, the maximum apparent quantum yield, stomatal conductance, and transpiration rate. The N application combined with spring snow or summer water addition both enhanced Amax of S. grandis in both experimental years, whereas N application only increased Amax of L. chinensis combined with summer water addition. Their responses were attributed to a concurrent increase in leaf N concentration (Nleaf) and decrease in leaf phosphorus (P) concentration (Pleaf), indicating that Nleaf and Pleaf affect photosynthetic characteristics to regulate leaf C exchange. Our results suggest that differentiated responses among different species in photosynthetic characteristics may lead to changes in ecosystem structure and functioning under increasing precipitation and N deposition.

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Effects of nitrogen addition on photosynthetic characteristics of Leymus chinensis in the temperate grassland of Nei Mongol, China

Cited by 3 publications

References 7 publications

Nitrogen addition enhances seed yield by improving soil enzyme activity and nutrients

Nitrogen addition enhances seed yield by improving soil enzyme activity and nutrients

Morphological and physiological responses of critically endangered Acer catalpifolium to nitrogen deposition levels

Leaf Carbon Exchange of Two Dominant Plant Species Impacted by Water and Nitrogen Application in a Semi-Arid Temperate Steppe

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