Interactions among nutrients govern the global grassland biomass–precipitation relationship

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(15)

Published: April 11, 2025

Ecosystems are experiencing changing global patterns of mean annual precipitation (MAP) and enrichment with multiple nutrients that potentially colimit plant biomass production. In grasslands, aboveground is closely related to MAP, but how this relationship changes after remains unclear. We hypothesized the biomass–MAP becomes steeper an increasing number added nutrients, increases in steepness corresponding form interaction among increased mediation by community diversity. measured production species diversity 71 grasslands on six continents representing span grassland diversity, management, soils. fertilized all sites nitrogen, phosphorus, potassium micronutrients combinations identify which limited at each site. As hypothesized, fertilizing one, two, or three progressively steepened relationship. The magnitude increase corresponded whether were not nitrogen either colimited both additive, synergistic forms. Unexpectedly, we found only weak evidence for relationships because richness, evenness, beta MAP opposing. Site-level properties including baseline production, soils, management explained little variation relationships. These findings reveal nutrient colimitation as a defining feature

Language: Английский

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Frequent failure of nutrients to increase plant biomass supports the need for precision fertilization in agriculture

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 25, 2025

Implementing precision fertilization to maximize crop yield while minimizing economic and environmental impacts has become critical for agriculture. Variability in biomass response within fields, among regions, over time creates simultaneous risks of under-yielding overfertilization. We quantify factors determining responsiveness (i.e., increases with fertilization) up 15 years 61 unfertilized rangelands on six continents. demonstrate widespread multi-year variability responsiveness, increasing average by 43% but failing improve 26% the time. All sites were responsive at least once, only four responded all plots years. Modelled management scenarios highlighted that fertilizer cessation is likely generate sizable savings always reduces because difficulty predicting when where will be unresponsive. This work reveals substantial scale-dependent globally, clarifying prospects pitfalls managing more spatially temporally precise nutrient application.

Language: Английский

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The dataset of main grain land changes in China over 1985–2020

Scientific Data, Journal Year: 2024, Volume and Issue: 11(1)

Published: Dec. 24, 2024

Continuous, Accurate, and detailed information on main grain land (MGL) areas is crucial for provisioning food security making policies affecting sustainable agricultural production. It still lacks a long-term MGL distribution dataset with fine spatial resolution. This study aimed to produce long-term, high-resolution map China. Here, we developed the change of resolution 30 m in China period 1985–2020 using Landsat image-based random forest algorithm GEE platform. Finally, planting intensity, gain time loss was calculated. Results indicate that our mapping results are highly consistent annual area various crops according national statistics. A validation based 3113 field survey samples 30-m showed overall accuracy were 93.57%. The full freely available at https://doi.org/10.6084/m9.figshare.26212643.v2 .

Language: Английский

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Interactions Among Food Systems, Climate Change, and Air Pollution: A Review

Engineering, Journal Year: 2024, Volume and Issue: 44, P. 215 - 233

Published: Dec. 28, 2024

Language: Английский

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