| 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 |
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| 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） |
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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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