| The effect of land use on the distribution of soil phosphorous forms in black soil profile |
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| DOI：10.7606/j.issn.1000-7601.2019.03.19 |
| Key Words: black soil land uses phosphorus content phosphorous activation coefficient phosphorous forms |
| Author Name | Affiliation | | GU Si-yu | College of Resource and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030， China | | ZHANG Yi-he | College of Resource and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030， China | | LU Xin-chun | Key Laboratory of Mollisols Agroecology, Northeast Institute of Geograpthy and Agroecology, CAS, Harbin, Heilongjiang 150081, China
National Observation Station of Hailun Agroecology System, Harbin, Heilongjiang 150081, China | | HAN Xiao-zeng | Key Laboratory of Mollisols Agroecology, Northeast Institute of Geograpthy and Agroecology, CAS, Harbin, Heilongjiang 150081, China
National Observation Station of Hailun Agroecology System, Harbin, Heilongjiang 150081, China | | ZOU Wen-xiu | Key Laboratory of Mollisols Agroecology, Northeast Institute of Geograpthy and Agroecology, CAS, Harbin, Heilongjiang 150081, China
National Observation Station of Hailun Agroecology System, Harbin, Heilongjiang 150081, China | | HAO Xiang-xiang | Key Laboratory of Mollisols Agroecology, Northeast Institute of Geograpthy and Agroecology, CAS, Harbin, Heilongjiang 150081, China
National Observation Station of Hailun Agroecology System, Harbin, Heilongjiang 150081, China |
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| Abstract: |
| Different land uses influence soil phosphorous (P) forms in soil profiles that determines soil P supply capacity. The distribution of soil P forms in different land uses including bare land, natural land, alfalfa land, farmland were studied based on a twelve-year field experiment located in National Observation Station of Hailun Agroecology System. Different land uses had influences to some extent on the distribution of soil P forms in black soil profiles. It showed that soil organic P content decreased as soil depth increased, and the content of inorganic P and available P and P activation coefficient (PAC) increased with increasing soil depth. Soil PAC in a given soil layer showed a decreasing trend in the order of natural land > bare land > alfalfa land > farmland. Soil total P and available P contents in farmland were lower than those in other treatments due to that the maize mainly absorbed inorganic P. Compared with bare land, the contents of Ca2-P,Ca8-P,Al-P,Fe-P,O-P and Ca10-P in farmland were decreased by 29.4%~75.3%,45.7%~59.5%,72.1%~83.3%,13.3%~36.1%、7.0%~33.2% and 19.3%~41.6%, respectively.The contents of inorganic P in natural land and alfalfa land were decreased by 11.5%~28.5% and 2.2%~31.0%, respectively. Compared the proportion of the organic P of bare land, the farmland, natural land and alfalfa land increased by a percentage of 7.0~16.4, 1.5~9.0, 0.8~13.9, respectively. Therefore, crop in farmland absorbed more inorganic P, which resulted in the percentage increase of organic P.However, natural land and alfalfa land enhanced the conversion from inorganic P to organic P, which also resulted in the percentage increase in organic P. |
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