Response of phosphorus fractions to land-use change followed by long-term fertilization in a sub-alpine humid soil of Qinghai–Tibet plateau
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Response of phosphorus fractions to land-use change followed by long-term fertilization in a sub-alpine humid soil of Qinghai–Tibet plateau. / Sun, Xiaolei; Li, Meng; Wang, Guoxi; Drosos, Marios; Liu, Fulai; Hu, Zhengyi.
In: Journal of Soils and Sediments, Vol. 19, No. 3, 03.2019, p. 1109–1119.Research output: Contribution to journal › Journal article › peer-review
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TY - JOUR
T1 - Response of phosphorus fractions to land-use change followed by long-term fertilization in a sub-alpine humid soil of Qinghai–Tibet plateau
AU - Sun, Xiaolei
AU - Li, Meng
AU - Wang, Guoxi
AU - Drosos, Marios
AU - Liu, Fulai
AU - Hu, Zhengyi
PY - 2019/3
Y1 - 2019/3
N2 - Purpose: Identification of phosphorus (P) species is essential to understand the transformation and availability of P in soil. However, P species as affected by land use change along with fertilization has received little attention in a sub-alpine humid soil of Tibet plateau. Materials and methods: In this study, we investigated the changes in P species using Hedley sequential fractionation and liquid-state 31P-NMR spectroscopy in soils under meadow (M) and under cropland with (CF) or without (CNF) long-term fertilization for 26 years in a sub-alpine cold-humid region in Qinghai–Tibet plateau. Results and discussion: Land-use change and long-term fertilization affected the status and fractions of P. A strong mineralization of organic P (OP) was induced by losing protection of soil organic matter (SOM) and Fe and Al oxides during land-use change and resulted in an increase of orthophosphate (from 56.49 mg kg−1 in M soils to 130.07 mg kg−1 in CNF soils) and great decreases of orthophosphate diesters (diester-P, from 23.35 mg kg−1 in M soils to 10.68 mg kg−1 in CNF soils) and monoesters (from 336.04 mg kg−1 in M soils to 73.26 mg kg−1 in CNF soils). Long-term fertilization boosted P supply but failed to reclaim soil diester-P (from 10.68 mg kg−1 in CNF soils to 7.79 mg kg−1 in CF soils). This may be due to the fragile protection from the combination of SOM with diester-P when long-term fertilization had only improved SOM in a slight extent. Conclusions: These results suggest that SOM plays an important role in the soil P cycling and prevents OP mineralization and losses from soil. It is recommended that optimization of soil nutrient management integrated with SOM was required to improve the P use efficiency for the development of sustainable agriculture.
AB - Purpose: Identification of phosphorus (P) species is essential to understand the transformation and availability of P in soil. However, P species as affected by land use change along with fertilization has received little attention in a sub-alpine humid soil of Tibet plateau. Materials and methods: In this study, we investigated the changes in P species using Hedley sequential fractionation and liquid-state 31P-NMR spectroscopy in soils under meadow (M) and under cropland with (CF) or without (CNF) long-term fertilization for 26 years in a sub-alpine cold-humid region in Qinghai–Tibet plateau. Results and discussion: Land-use change and long-term fertilization affected the status and fractions of P. A strong mineralization of organic P (OP) was induced by losing protection of soil organic matter (SOM) and Fe and Al oxides during land-use change and resulted in an increase of orthophosphate (from 56.49 mg kg−1 in M soils to 130.07 mg kg−1 in CNF soils) and great decreases of orthophosphate diesters (diester-P, from 23.35 mg kg−1 in M soils to 10.68 mg kg−1 in CNF soils) and monoesters (from 336.04 mg kg−1 in M soils to 73.26 mg kg−1 in CNF soils). Long-term fertilization boosted P supply but failed to reclaim soil diester-P (from 10.68 mg kg−1 in CNF soils to 7.79 mg kg−1 in CF soils). This may be due to the fragile protection from the combination of SOM with diester-P when long-term fertilization had only improved SOM in a slight extent. Conclusions: These results suggest that SOM plays an important role in the soil P cycling and prevents OP mineralization and losses from soil. It is recommended that optimization of soil nutrient management integrated with SOM was required to improve the P use efficiency for the development of sustainable agriculture.
KW - Compost
KW - Hedley sequential fractionation
KW - Liquid-state P-NMR
KW - Meadow soil
KW - Organic phosphates
UR - http://www.scopus.com/inward/record.url?scp=85053428993&partnerID=8YFLogxK
U2 - 10.1007/s11368-018-2132-y
DO - 10.1007/s11368-018-2132-y
M3 - Journal article
AN - SCOPUS:85053428993
VL - 19
SP - 1109
EP - 1119
JO - Journal of Soils and Sediments
JF - Journal of Soils and Sediments
SN - 1439-0108
IS - 3
ER -
ID: 213624877