谷思玉,张一鹤,陆欣春,韩晓增,邹文秀,郝翔翔.不同土地利用方式对农田黑土剖面磷形态分布的影响[J].干旱地区农业研究,2019,37(3):149~156
不同土地利用方式对农田黑土剖面磷形态分布的影响
The effect of land use on the distribution of soil phosphorous forms in black soil profile
  
DOI:10.7606/j.issn.1000-7601.2019.03.19
中文关键词:  黑土  利用方式  磷含量  磷活化系数  磷形态
英文关键词:black soil  land uses  phosphorus content  phosphorous activation coefficient  phosphorous forms
基金项目:国家重点研发计划项目(2017YFD0300605,2016YFD0300806,2016YFD0200309,);黑龙江省应用技术研究与开发计划(GY2017ZB006);公益性行业(农业)科研专项(201503120);中国科学院东北地理与农业生态研究所青年科学家小组项目(DLSXZ1605)
作者单位
谷思玉 College of Resource and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030 China 
张一鹤 College of Resource and Environment, Northeast Agricultural University, Harbin, Heilongjiang 150030 China 
陆欣春 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 
韩晓增 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 
邹文秀 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 
郝翔翔 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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中文摘要:
      不同土地利用方式影响土壤磷形态分布,从而决定土壤潜在供磷能力。本文对4种土地利用方式下(裸地、自然草地、苜蓿地、农田)的黑土土壤剖面磷素分布进行测定分析,结果表明,不同利用方式持续12 a对黑土剖面磷形态分布影响较大,黑土中有机磷含量随土层深度增加而降低,而无机磷、有效磷含量及磷素活化系数随土层深度增加而呈增加趋势,在同一土层磷素活化系数表现为自然草地>裸地>苜蓿地>农田。农田不施肥处理经过12 a玉米种植后,土壤中全磷、有效磷含量均低于其他利用方式,玉米植株主要吸收土壤中无机磷,与裸地相比,农田土壤Ca2-P、Ca8-P、Al-P、Fe-P、O-P、Ca10-P含量依次降低了29.4%~75.3%、45.7%~59.5%、72.1%~83.3%、13.3%~36.1%、7.0%~33.2%、19.3%~41.6%。自然草地和苜蓿地比裸地无机磷含量分别降低11.5%~28.5%、2.2%~31.0%;与裸地相比,农田、自然草地和苜蓿地有机磷所占比例分别增加7.0~16.4、1.5~9.0、0.8~13.9个百分点。总之,不施肥农田作物吸收消耗了土壤中无机磷,使有机磷所占比例有所增加;自然草地和苜蓿地可使土壤中无机磷向有机磷转化,使有机磷比例有所增加。
英文摘要:
      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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