Article
Biodiversity Conservation
Li Liu, Shining Zuo, Mingyan Ma, Jiahuan Li, Lizhu Guo, Ding Huang
Summary: Nitrogen addition can alter the reproductive strategy and growth patterns of Leymus chinensis, leading to higher investment in vegetative and clonal organs, and lower investment in sexual organs. The optimal N addition rates for sexual reproduction, vegetative growth, and clonal reproduction were found to be 16 g N m^(-2) and 32 g N m^(-2) respectively.
GLOBAL ECOLOGY AND CONSERVATION
(2021)
Article
Plant Sciences
Wenzheng Song, Michael E. Loik, Haiying Cui, Mingcai Fan, Wei Sun
Summary: Effective utilization of water is crucial for maintaining plant biomass. The study found that nitrogen deposition has a significant impact on water use efficiency and photosynthesis properties of plants. In salinized-alkalized grasslands, increased nitrogen availability can enhance photosynthesis and water use efficiency. These findings are important for predicting the response of grasslands to future nitrogen deposition.
PLANT GROWTH REGULATION
(2022)
Article
Plant Sciences
Guojiao Yang, Zijia Zhang, Guangming Zhang, Qianguang Liu, Peiming Zheng, Renqing Wang
Summary: This study found that nitrogen enrichment can stimulate plant growth and modify functional traits. However, different nitrogen compound types had no significant effect on plant growth. Increasing nitrogen addition rate can increase plant aboveground biomass and leaf nitrogen concentration, but decrease leaf dry matter content. The effects of nitrogen addition on aboveground biomass and functional traits were asymmetric, with aboveground biomass showing a higher sensitivity.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Jirui Gong, Zihe Zhang, Biao Wang, Jiayu Shi, Weiyuan Zhang, Qi Dong, Liangyuan Song, Ying Li, Yingying Liu
Summary: This study investigated the response of carbon and nitrogen metabolism coordination in the dominant grass species Leymus chinensis to different nitrogen addition levels in a semiarid grassland in northern China. The results showed that moderate nitrogen levels promoted photosynthesis and increased photosynthetic capacity, while higher nitrogen levels promoted nitrogen investment in nonphotosynthetic pathways. Nitrogen addition also stimulated the accumulation of carbon and nitrogen compounds across organs by activating metabolic enzymes, and triggered the transformation of primary metabolites to secondary metabolites. L. chinensis demonstrated adaptability to different nitrogen addition levels by adjusting the allocation of carbon and nitrogen metabolic compounds.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Agronomy
Sisi Chen, Miao Wang, Chu Zhang, Tianqi Yu, Xiaoping Xin, Keyu Bai, Xiaoyu Zhu, Ruirui Yan
Summary: Long-term grazing in Inner Mongolia grassland leads to soil degradation. A study was conducted on the Hulunbeier meadow steppe to investigate the effects of six different grazing intensities on soil nitrogen content and storage, as well as the response of vegetation and other physical and chemical properties of soil to grazing. The results showed that moderate grazing increased soil nitrogen contents, while heavy grazing decreased microbial biomass nitrogen content. Rainfall and grazing intensity influenced the nitrogen components and storages in the soil.
Article
Environmental Sciences
Dan-Dan Zhao, Hong-Yuan Ma, Lei Wang, Shao-Yang Li, Wen-Wen Qi, Meng-Yao Ma, Jiang-Bao Xia
Summary: The seed yield of Leymus chinensis is positively correlated with precipitation and nitrogen addition, with heading number being a critical factor affecting seed yield. Environmental cues experienced by the mother plants affect seed germination percentage and time to reach 50% germination.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Plant Sciences
Xiaowei Wei, Yuheng Yang, Jialiang Yao, Jiayu Han, Ming Yan, Jinwei Zhang, Yujie Shi, Junfeng Wang, Chunsheng Mu
Summary: The increasing atmospheric nitrogen deposition has significant impacts on nitrogen availability and photosynthetic capacity of terrestrial plants. This study reveals that within-leaf nitrogen allocation optimization is a key adaptive mechanism for plants to maximize their photosynthetic nitrogen-use efficiency and biomass under predicted future global changes.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Soil Science
Shuhai Wen, Yuqiang Tian, Shengnan Ouyang, Minghua Song, Xiaobing Li, Yong Zhang, Si Gao, Xingliang Xu, Yakov Kuzyakov
Summary: The study found that high frequency extreme precipitation events can enhance plant productivity and nitrogen acquisition by reducing the proportion of nitrogen forms available for plants and soil microorganisms in temperate grasslands. This shift in precipitation frequency creates optimal conditions for ecosystem functions in response to extreme climate events.
BIOLOGY AND FERTILITY OF SOILS
(2022)
Article
Multidisciplinary Sciences
Shujie Li, Yujin Huang, Yuefen Li
Summary: The Leymus chinensis populations in the southwestern Songnen Plain are threatened by increasing soil salinity and alkalinity, despite their tolerance to salt and alkali stress. Nitrogen content was found to be more sensitive to saline-alkali stress than phosphorus content, with the highest N and P content observed at pH 8.4. Exposure to 14-day incremental intervals of saline-alkali stress had weaker effects on the plants. When lacking in nitrogen, applying N fertilizer was found to be extremely efficient.
Article
Agronomy
Xiliang Li, Ningning Hu, Jingjing Yin, Weibo Ren, Ellen Fry
Summary: The legacy effects induced by long-term overgrazing on nitrogen uptake and metabolism in clonal plants can affect their stress tolerance and nutrient assimilation, providing insights into the resilience of grasslands to overgrazing.
Article
Agronomy
Yujie Shi, Yunna Ao, Baixin Sun, Johannes M. H. Knops, Jinwei Zhang, Zhihan Guo, Xianming De, Jiayu Han, Yuheng Yang, Xiaoyu Jiang, Chunsheng Mu, Junfeng Wang
Summary: Changes in rainfall patterns and nitrogen deposition can affect plant productivity. Decreased rainfall amount and frequency both reduce the aboveground net primary productivity (ANPP) of Leymus chinensis, while nitrogen addition increases ANPP. Shoot density is the key factor in the response of ANPP to changes in rainfall patterns and nitrogen deposition.
Article
Plant Sciences
Qiang Guo, Ruo-Hui Zhang, Xue-Li Li, Xiao-Wei Liu, Ya-Nan Li, Fu Xing
Summary: The rapid spread and growth of poisonous plants in grasslands result in large amounts of plant litter. The addition of this litter can affect the growth of palatable plants and their associated microbes, and nitrogen input may mediate these effects. In a greenhouse experiment, it was found that litter addition of the poisonous plant Stellera chamaejasme increased the ramet number and aboveground biomass of the dominant grass Leymus chinensis, but decreased the spore density of arbuscular mycorrhizal fungi (AMF). However, high nitrogen addition may override the effects of the litter on the grass and AMF by alleviating soil nitrogen limitation and inhibiting litter decomposition.
JOURNAL OF PLANT ECOLOGY
(2022)
Article
Agronomy
Dafu Yu, Xingyu Zheng, Chunsheng Mu, Junfeng Wang
Summary: The composition of bud bank has a significant impact on shoot population density in perennial grasses, and the density of axillary shoot buds can be increased through irrigation and nitrogen application, leading to an increase in forage yield.
Article
Plant Sciences
Jinwei Zhang, Xiangjin Shen, Bifan Mu, Yujie Shi, Yuheng Yang, Xuefeng Wu, Chunsheng Mu, Junfeng Wang
Summary: The study demonstrates that increased rainfall amounts with prolonged dry intervals can promote Leymus chinensis biomass production by increasing soil moisture, while prolonged dry intervals with increased precipitation per event may decrease the available soil nitrogen content. Different rainfall patterns can affect the biomass production of Leymus chinensis.
Article
Ecology
Erin J. Questad, Robert L. Fitch, Joshua Paolini, Eliza Hernandez, Katharine N. Suding
Summary: The study found that increasing nitrogen deposition may lead to an increase in invasive species, which in turn affects the population of native species, especially when nitrogen deposition has a greater impact on the growth of native plants, leading to a significant decline in native plant populations.