Distribution of Soil N, P and K of Farmland and Natural Grassland in Southwest Tibet

Lihua Cao, Shenglan Fu, Heman Liu, Xiaojun Allen Liu

2018

Abstract

The amount and the cycling of soil Nitrogen (N), phosphorus (P), and potassium (K) are significantly affected by land use types. However, few studies determined the differences in the N, P, and K distributions in different soil layers from farmland and grassland in alpine areas. The main agricultural area of Tibet was selected to analyze the changes in total nitrogen (TN), total phosphorus (TP), total potassium (TK), available N (AN), available P (AP), and available K (AK) in farmland and adjacent natural grassland at different depths. The TN, TP, AN, AP, and AK concentrations and the N:P, N:K, and P:K ratios in farmland and grassland in the 0–50 cm layer decreased with increasing soil depth, whereas the content of TK increased. The effect on TN in soil is greater in grassland than in farmland and mainly occurs in the surface layer (0–10 cm). No obvious differences in TP were noted between the two land use types.TK in all soil layers was higher in grassland than in farmland; agricultural production was responsible for a net consumption of soil K. Soil TN is more sensitive to land use than soil TP and TK. The effect of soil surface aggregation effect on TN (0–20 cm) is greater in farmland than grassland, and no significant aggregation effect was found for TP and TK. The results can provide useful information for the estimation of soil N, P and K content in different land use types and land management in Tibet plateau.

Paper Citation

in Harvard Style

Cao L., Fu S., Liu H. and Liu X. (2018). Distribution of Soil N, P and K of Farmland and Natural Grassland in Southwest Tibet.In Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG, ISBN 978-989-758-342-1, pages 331-339. DOI: 10.5220/0007430003310339

in Bibtex Style

@conference{iweg18,
author={Lihua Cao and Shenglan Fu and Heman Liu and Xiaojun Allen Liu},
title={Distribution of Soil N, P and K of Farmland and Natural Grassland in Southwest Tibet},
booktitle={Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,},
year={2018},
pages={331-339},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007430003310339},
isbn={978-989-758-342-1},
}

in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,
TI - Distribution of Soil N, P and K of Farmland and Natural Grassland in Southwest Tibet
SN - 978-989-758-342-1
AU - Cao L.
AU - Fu S.
AU - Liu H.
AU - Liu X.
PY - 2018
SP - 331
EP - 339
DO - 10.5220/0007430003310339