Article
Green & Sustainable Science & Technology
Xueyan Lu, Lu Wen, Haoyu Sun, Tao Fei, Huan Liu, Sina Ha, Shiming Tang, Lixin Wang
Summary: Anthropogenic activities have increased phosphorus deposition and affected the carbon cycle in grassland ecosystems. A meta-analysis of 41 studies and 75 independent study sites worldwide found that phosphorus addition significantly increased soil respiration in grasslands, but the response varied among different grassland ecosystem types.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agronomy
Erica Stroud, Hugh A. L. Henry
Summary: This study compared the short-term and long-term effects of nitrogen and warming on soil organic matter in northern temperate ecosystems. The results showed that the responses of soil organic matter differed between short-term and long-term experiments.
Article
Environmental Sciences
Gao-Lin Wu, Zhen Cheng, Juha Mikael Alatalo, Jingxue Zhao, Yu Liu
Summary: This study found that aboveground net primary productivity (ANPP) of all major grassland types in northern China consistently declined over the past 30 years, on average by about 6.1%. The primary factor driving this decrease was warming, increased solar radiation, and resulting soil temperature rise. Alpine and lowland grasslands were more sensitive to climate change compared to temperate grasslands.
Article
Environmental Sciences
Zhen-Huan Guan, Zuonan Cao, Xiao Gang Li, Thomas Scholten, Peter Kuehn, Lin Wang, Rui-Peng Yu, Jin-Sheng He
Summary: Plants can modulate their phosphorus acquisition strategies to adapt to varying soil phosphorus availability. When soil phosphorus is low, nitrogen addition increases the release of carboxylates from plant roots and leads to a higher percentage of colonization by arbuscular mycorrhizal fungi (AMF), along with decreased root length and specific root length (SRL). When soil phosphorus is higher, nitrogen addition increases the plant's demand for phosphorus, accompanied by an increase in root diameter and phosphatase activity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Agriculture, Multidisciplinary
Wenchao Wu, Fang Wang, Anquan Xia, Zejin Zhang, Zongsong Wang, Kui Wang, Junfu Dong, Tong Li, Yibo Wu, Rongxiao Che, Linfeng Li, Shuli Niu, Yanbin Hao, Yanfen Wang, Xiaoyong Cui
Summary: The study found that phosphorus addition has a positive effect on soil microbes globally, increasing their abundance regardless of nitrogen input. This effect is more pronounced in areas with higher phosphorus addition rate, mean annual temperature, and mean annual precipitation. Higher phosphorus addition frequency leads to a higher abundance of bacteria compared to fungi, but a lower fungi-to-bacteria ratio. The effect of phosphorus addition on bacteria and fungi ratios is more significant in forests and varies with different forms of phosphorus fertilizers.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Environmental Sciences
Chuang Yan, Zhiyou Yuan, Zunchi Liu, Jingjing Zhang, Kai Liu, Xinrong Shi, T. Ryan Lock, Robert L. Kallenbach
Summary: This study investigated the effects of warming and N addition on root traits in different grassland ecosystems along an aridity gradient in northern China. Results showed that warming increased root-shoot ratio in dry years but decreased root production and turnover in all grasslands, while N addition had varying effects on root traits depending on the grassland type and aridity level. Overall, warming and N addition had different impacts on root traits in the studied grasslands.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Yulin Li, Hongling Yang, Yongzhong Su, Xiangwen Gong, Bo Yao, Li Cheng
Summary: A 9-year field experiment in Inner Mongolian steppes showed that nitrogen and phosphorus addition altered the richness, diversity, and composition of soil bacterial community. Nitrogen addition reduced the relative abundance of Acidobacteria, Chloroflexi, and Nitrospirae, while phosphorus addition enriched a certain bacterial biomarker. The combined N and P treatment had the most significant effects on the soil bacterial community.
Article
Biodiversity Conservation
Nan Cui, Lianxuan Shi, Jixun Guo, Tao Zhang
Summary: The study demonstrates that the interactions among warming, nitrogen deposition, and AM fungi can affect soil N2O emissions, and the role of AM fungi in reducing N2O emissions is influenced by different global change contexts.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Qing Qu, Minggang Wang, Hongwei Xu, Ziran Yan, Guobin Liu, Sha Xue
Summary: This study investigated the effects of nitrogen addition on plant community biomass, evenness, and composition in a grassland community. The results showed that nitrogen addition significantly increased plant biomass, but decreased community evenness. The abundance of bacteria and fungi were also affected by nitrogen addition, but their composition remained unchanged.
LAND DEGRADATION & DEVELOPMENT
(2022)
Article
Environmental Sciences
Kate M. Buckeridge, Jennie R. McLaren, Michelle C. Mack, Edward A. G. Schuur, Joshua Schimel
Summary: Retrogressive thaw slumps (RTS) are increasing due to thermal erosion of soil and vegetation after ground ice thaw. The recovery of plant biomass after RTS is crucial for maintaining Arctic carbon stocks. In this study, we investigated the potential sources of nitrogen (N) and phosphorus (P) to support shrub growth in Alaskan RTS. We found that multiple mechanisms may have contributed to mid-successional shrub growth, including sustained N-cycling, N leaching from undisturbed tundra, uninvestigated sources of N-2-fixation, and deep mineral soil N stocks.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Plant Sciences
Jiannan Xiao, Shikui Dong, Hao Shen, Shuai Li, Kelly Wessell, Shiliang Liu, Wei Li, Yangliu Zhi, Zhiyuan Mu, Hongbo Li
Summary: This study found that soil microbial functional genes in the alpine grassland ecosystem are more influenced by phosphorus availability than nitrogen. Phosphorus addition significantly increased the abundance of carbon, nitrogen, and phosphorus cycling genes, while nitrogen addition had minimal effect. However, when nitrogen and phosphorus were added together, the promoting effects of phosphorus addition on gene abundances were overwhelmed by nitrogen addition. Shoot phosphorus concentration played a major role in regulating the abundance of these genes.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Chunli Li, Yonghui Li, Xinwei Li, Li Ma, Yuanming Xiao, Chunhui Zhang
Summary: The study found that nitrogen (N) addition significantly promoted plant aboveground biomass in alpine grassland ecosystems, with a stronger response in restored grasslands compared to natural grasslands. In addition, the results suggested that climate warming could enhance plant biomass allocation to belowground under ongoing N deposition and highlighted the importance of precipitation for plant growth and aboveground biomass accumulation in restored alpine grasslands.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Agronomy
Yan Yan, Xiuting Sun, Fengwei Sun, Yinan Zhao, Wei Sun, Jixun Guo, Tao Zhang
Summary: The study found that soil fungi and bacteria were more sensitive to phosphorus (P) addition than nitrogen (N), and the response of soil microbes to N and P was more sensitive than that of the plant community. The enrichment of available P in soil reduced bacterial diversity, while fungal diversity was mainly influenced by soil nitrogen and phosphorus concentrations, as well as soil moisture.
Article
Microbiology
Bikram K. Das, Satoshi Ishii, Linto Antony, Alexander J. Smart, Joy Scaria, Volker S. Brozel
Summary: The stability of nitrogen cycling and bacterial community across growing seasons in a natural grassland was observed, contradicting the initial hypothesis.
Article
Agronomy
Dongxian Wei, Shengbao Wei, Anchun Peng, Chaoran Yang, Changqing Chen
Summary: Understanding the impact of global warming on soil bacterial diversity is crucial, especially in winter wheat fields. Through infrared heating and nitrogen fertilizer application, this study found that temperature increase and nitrogen application can alter the community structure and diversity of soil bacteria, with soil moisture being an important mediator.