Article
Agronomy
Leticia D. L. Gomes, Mauricio L. Ferreira, Shoey Kanashiro, Armando R. Tavares
Summary: The roots of silver vase bromeliad are more efficient in absorbing and utilizing inorganic nitrogen compared to leaf-absorbing trichomes.
Article
Agronomy
Haoru Li, Xurong Mei, Vinay Nangia, Rui Guo, Yuee Liu, Weiping Hao, Jiandong Wang
Summary: The study found that urea and calcium nitrate had higher yields in the first year, while ammonium sulfate increased wheat yield in subsequent years and urea and ammonium sulfate had higher average yields for maize, with urea performing better in NUE and WUE. Urea also had lower N loss compared to other fertilizers after three cycles, making it the optimal choice for maize under drip fertigation.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Marine & Freshwater Biology
Tiffany Hiroko Cedeno, Mark A. Brzezinski, Robert J. Miller, Daniel C. Reed
Summary: Giant kelp exhibited surge uptake of ammonium and nitrate in summer, but had limited capacity for surge uptake of urea. The ecological importance of surge uptake patterns for ammonium and nitrate is questionable, as the small scale and ephemeral nature of ammonium pulses, together with longer duration pulses of nitrate, may sustain giant kelp growth during seasons with low nitrate concentrations.
Article
Environmental Sciences
Gongning Chen, Yanhong Du, Liping Fang, Xiangqin Wang, Chuanping Liu, Huanyun Yu, Mi Feng, Xi Chen, Fangbai Li
Summary: This study investigates the effects of different forms of nitrogen fertilizer on the reduction and dissolution of arsenic-bearing iron minerals and microbial-mediated arsenic transformation processes. The results show that nitrate nitrogen fertilizer reduces the bio-availability of arsenic in soil, while ammonium nitrogen fertilizer promotes the release of arsenic into porewater. However, the combined application of nitrate and ammonium nitrogen has no significant effect on arsenic concentration in rice grain and its transformation in paddy soils. These findings provide insights into the rational use of nitrogen fertilizers to reduce the risk of arsenic contamination in rice.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Plant Sciences
Samar Swify, Dovile Avizienyte, Romas Mazeika, Zita Braziene
Summary: Combined nitrogen and sulfur fertilization can reduce N loss, increase N fertilizer efficiency, and improve maize grain yields. Urea+ ammonium sulfate and urea cocrystal showed significant increases in grain yields.
Article
Agronomy
Gunavathy Selvarajh, Huck Ywih Ch'ng
Summary: The addition of rice straw biochar at 5-10 t/ha significantly increased the availability of nitrogen in the soil, as well as the exchangeable NH4+, NO3-, phosphorus, and potassium content. This led to improved nutrient uptake by rice plants, resulting in increased plant growth and productivity.
Article
Agronomy
Chaojun Peng, Zaicheng Zhang, Yan Li, Yu Zhang, Haibin Dong, Yuhui Fang, LiuPeng Han, Weigang Xu, Lin Hu
Summary: The genetic improvement of wheat cultivars since 1941 has significantly increased grain yield and NUE, mainly due to the increase of NupE and NutE. NutE is the predominant component affecting NUE in HN, while NupE is more important than NutE in LN. The increase in NTE is mainly attributed to increased N accumulation during the stem elongation phase.
FIELD CROPS RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Zhuoyi Chen, Shijie Ren, Ruimiao Qin, Pengcheng Nie
Summary: This study successfully achieved a rapid and accurate detection of nitrogen content in different types of soil using near-infrared hyperspectral imaging technology combined with multiple algorithms and models, providing a research basis for the development of precision agriculture in the future.
Article
Agronomy
Kaikuo Wu, Zhe Zhang, Liangshan Feng, Wei Bai, Chen Feng, Yuchao Song, Ping Gong, Yue Meng, Lili Zhang
Summary: Returning corn stalks to the field can reduce N2O emissions, especially when combined with urea application. By lowering the concentrations of NH4+-N and NO3--N derived from urea, the substrate required for N2O production in nitrification and denitrification processes is reduced. Additionally, the combination of corn stalks and urea can effectively inhibit the abundance of key N2O-producing genes AOA amoA, nirS, and nirK.
Article
Forestry
Rui Wang, Zhilong He, Zhen Zhang, Ting Xv, Xiangnan Wang, Caixia Liu, Yongzhong Chen
Summary: This study investigated the effects of nitrogen form on root activity and nitrogen uptake kinetics of Camellia oleifera Abel. seedlings. The results showed that a mixed nitrogen source improved the root activity of C. oleifera seedlings, and the best nitrate/ammonium ratio was 5:5.
Article
Agronomy
Hao-Qing Zhang, Ren-Fang Shen, Xue-Qiang Zhao
Summary: This study found that in acidic soils, maize generally prefers NO3-, while in neutral to alkaline soils, it prefers NH4+. The pH of the soil and nutrient solution is a key factor influencing maize's preference for NH4+ vs. NO3-.
Article
Environmental Sciences
Jianxing Zhu, Qiufeng Wang, Nianpeng He, Guirui Yu
Summary: Long-term atmospheric nitrogen deposition affects ecosystem productivity in terrestrial ecosystems in China. Different components of nitrogen deposition have varying effects on different ecosystems. N use efficiency of productivity induced by nitrogen deposition is influenced by precipitation and aridity index.
ENVIRONMENTAL RESEARCH
(2021)
Review
Biochemistry & Molecular Biology
Omar Zayed, Omar A. Hewedy, Ali Abdelmoteleb, Mohammed Ali, Mohamed S. Youssef, Ahmed F. Roumia, Danelle Seymour, Ze-Chun Yuan
Summary: Plants uptake and assimilate nitrogen from the soil, and nitrate and ammonium transporters play important roles in this process. Nitrogen is then incorporated into organic compounds through nitrogen metabolism pathways. Nitric oxide has been found to enhance plant survival under drought stress, and the interaction between nitrogen and salt stress has been studied. Excessive use of nitrate fertilizers can have negative impacts on health and the environment, highlighting the importance of alternative strategies. Genomics can identify new genes related to nitrogen fixation, which can be utilized to improve plant productivity.
Article
Plant Sciences
Lin Luo, Chunzhang Zhao, Donghui Zheng, Entao Wang, Jin Liang, Chunying Yin
Summary: The preference for different nitrogen forms can enhance plant survival and fitness. This study examined how soil water availability, nitrogen addition, and their interaction affect plant nitrogen uptake preference and allocation in Populus cathayana. The results showed that nitrogen addition increased plant biomass and nitrogen accumulation but decreased nitrogen allocation to leaves. Drought decreased plant biomass, nitrogen accumulation, and nitrogen uptake, and intensive drought had a greater impact than mild drought. The study also found that P. cathayana exhibited ammonium preference under intensive drought conditions. Overall, this study provides valuable insights into how plants adapt and prefer different nitrogen forms under drought stress.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2023)
Article
Horticulture
Yudan Wang, Xiaoyun Zhang, Houcheng Liu, Guangwen Sun, Shiwei Song, Riyuan Chen
Summary: The aim of this study was to examine the effects of different NH4+/NO3- ratios on the growth and nitrogen uptake of Chinese kale under hydroponic conditions. The results showed that an appropriate NH4+/NO3- ratio promoted the growth of Chinese kale, while a high ratio inhibited growth. Additionally, the study found that an increase in NH4+ facilitated nutrient uptake, but excessive addition could lead to rhizosphere acidification and ammonia toxicity.