Influences of nitrogen input forms and levels on phosphorus availability in karst grassland soils

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dc.citation.volume8
dc.contributor.authorZhou J
dc.contributor.authorYang F
dc.contributor.authorZhao X
dc.contributor.authorGu X
dc.contributor.authorChen C
dc.contributor.authorChen J
dc.date.accessioned2024-07-29T03:13:07Z
dc.date.available2024-07-29T03:13:07Z
dc.date.issued2024-01-18
dc.description.abstractThe availability of soil phosphorus (P), a crucial nutrient influencing plant productivity and ecosystem function, is impacted by continuously increasing nitrogen (N) enrichment, which changes the soil P cycle. The effect of varying forms of N input on soil P dynamics in P-limited karst grassland ecosystems remains unclear. To address this knowledge gap, we conducted a greenhouse experiment to explore the effects of various forms of N addition [Ca(NO3)2, NH4Cl, NH4NO3, Urea] on soil P fractions in these ecosystems, applying two levels (N1: 50 mg N kg−1soil, N2: 100 mg N kg−1soil) of N input in two soils (yellow soil, limestone soil). Results indicated that P fractions in both soil types were significantly affected by N additions, with yellow soil demonstrating a higher sensitivity to these additions, and this effect was strongly modulated by the form and level of N added. High N addition, rather than low N, significantly affect the P fractions in both soil types. Specially, except for Ca(NO3)2, high N addition significantly increased the available P in both soils, following the order: Urea and NH4NO3 > NH4Cl > Ca(NO3)2, and decreased NaHCO3-Pi in both soils. High N addition also significantly reduced NaOH-Po and C.HCl-Po fractions in yellow soil. Additionally, the response of root biomass and alkaline phosphatase activity in both soils to N input paralleled the trends observed in the available P fractions. Notably, changes in soil available P were strongly correlated with plant root biomass and soil alkaline phosphatase activity. Our study highlights that the N addition form significantly influences soil P availability, which is closely tied to plant root biomass and alkaline phosphatase activity. This finding underscores the importance of considering N input form to boost soil fertility and promote sustainable agriculture.
dc.description.confidentialfalse
dc.identifier.citationZhou J, Yang F, Zhao X, Gu X, Chen C, Chen J. (2024). Influences of nitrogen input forms and levels on phosphorus availability in karst grassland soils. Frontiers in Sustainable Food Systems. 8.
dc.identifier.doi10.3389/fsufs.2024.1343283
dc.identifier.eissn2571-581X
dc.identifier.elements-typejournal-article
dc.identifier.number1343283
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71134
dc.languageEnglish
dc.publisherFrontiers Media S.A.
dc.publisher.urihttps://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2024.1343283/full
dc.relation.isPartOfFrontiers in Sustainable Food Systems
dc.rights(c) 2024 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectphosphorus fractions
dc.subjectnitrogen input
dc.subjectnitrogen form
dc.subjectphosphatase activity
dc.subjectphoC
dc.subjectphoD
dc.titleInfluences of nitrogen input forms and levels on phosphorus availability in karst grassland soils
dc.typeJournal article
pubs.elements-id486724
pubs.organisational-groupOther
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