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- Title
茭白田土壤磷库特征及其与种植年限的关系和流失风险.
- Authors
单英杰; 任白琳; 陈宇航; 丁志峰; 章明奎
- Abstract
In the present study, the abundance and deficiency of phosphorus in surface (0-20 cm) soil and characteristics of phosphorus pool in typical Zizania latifolia planting areas in Zhejiang Province were investigated, and the relationship between the plantation years of Zizania latifolia and the accumulation of phosphorus in soil was analyzed. It was shown that the average contents of total P and available P (Olsen-P) in the soil samples were 876.73, 63.30 mg·kg-1, respectively. Phosphorus was accumulated in the soil of Zizania latifolia planting areas, and the proportion of soil samples with abundant level of available P was as high as 81.05%. Inorganic P was the main form of P in the soil samples, which accounted for 79.91% of the total P on average. The average contents of water-extractable inorganic P (H2O-Pi), NaHCO3-extractable inorganic P (NaHCO3-Pi), NaOH-extractable inorganic P (NaOH-Pi), HCl-extractable inorganic P (HCl-Pi), NaHCO3-extractable organic P (NaHCO3-Po), NaOH-extractable organic P (NaOH-Po) and residual P were 16.16, 122.06, 213.03, 103.22, 22.18, 158.52, 241.86 mg·kg-1, respectively. Except the residual P and HCl-Pi, the contents of the other forms of P increased with the increasing planting years of Zizania latifolia. The degree of P sorption saturation increased with the increasing plantation years of Zizania latifolia, while soil phosphorus moved downward along the profile obviously. When the soil available P content was greater than 60 mg·kg-1, the phosphorus leaching risk increased, and about 48.37% of the soil samples showed high phosphorus leaching risk.
- Publication
Acta Agriculturae Zhejiangensis, 2023, Vol 35, Issue 11, p2645
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.20221683