| 定位施磷对土壤无机磷形态土层分布的影响 |
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| 引用本文： | 熊俊芬,石孝均,毛知耘.定位施磷对土壤无机磷形态土层分布的影响[J].西南农业大学学报,2000,22(2):123-125. |
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| 作者姓名： | 熊俊芬 石孝均 毛知耘 |
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| 作者单位： | 熊俊芬（云南农业大学 农业科学技术学院，昆明 650201）;石孝均（西南农业大学 资源环境学院，重庆 400716）;毛知耘（西南农业大学 资源环境学院，重庆 400716） |
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| 摘 要： | 通过 6 年田间定位试验，采用顾益初、蒋柏藩提出的石灰性土壤无机磷分级方法研究测定无机磷形态在 0～20cm(表层)和 20～40 cm(下层)土层的分布。结果表明不论是否施肥，6 年试验后无机磷形态分布特点为 Ca2－P，O－P(闭蓄态磷)含量表层高于 20～40 cm 土层；F3－P 相反，是下层高于表层。长期施磷表层和 20～40 cm 土层各形态无机磷以及土壤全磷均有增加，Ca2－P，Ca8－P，Al－P，O－P，Ca10－P 和土壤全磷均是表层增加明显，对 20～40 cm 土层影响小的特点；Fe－P 相反，是 20～40 cm 土层增加较 0～20 cm 显著，表明长期水旱轮作下，磷向下层移动。
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| 关 键 词： | 定位试验 无机磷形态 土层分布 磷肥 土壤养分 |
| 文章编号： | 1000-2642(2000)02-0123-03 |
| 修稿时间： | 2000-01-10 |
EFFECTS OF SIX - YEAR PHOSPHORUS FERTILIZATION ON THE DISTRIBUTION OF INORGANIC P FORMS IN SURFACE SOIL AND SUBSOIL |
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| XIONG Jun - fen
SHI Xiao - jun
,MAO Zhi - yun.EFFECTS OF SIX - YEAR PHOSPHORUS FERTILIZATION ON THE DISTRIBUTION OF INORGANIC P FORMS IN SURFACE SOIL AND SUBSOIL[J].Journal of Southwest Agricultural University,2000,22(2):123-125. |
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| Authors: | XIONG Jun - fen
SHI Xiao - jun MAO Zhi - yun |
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| Institution: | XIONG Jun - fen
;(Faculty of Agricultural Science and Technology, Yunnan Agricultural University, Kunming, Yunnan 650201, China);SHI Xiao - jun
,MAO Zhi - yun
;(Southwest Agricultural University, Chongqing 400716, China) |
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| Abstract: | In a six - year experiment conducted to study the effects of phosphate fertilization on the distribution of different inorganic P forms in the 0 - 20 cm and 20 - 40 cm layers of the soil, the method of fractionation of calcareous soil phosphorus forms developed by Gu Yichu and Jiang Baifan was adopted. With or without P fertilizer application, the distribution of inorganic phosphorus forms examined at the end of the experiment showed a similar pattem Ca2 - P and O - P were higher in the surface soil (0 - 20 cm layer) than in the subsoil (20 - 40 cm layer) and Fe - P was higher in the subsoil than in the surface soil. Long - term application of P fertilizer increased various forms of inorganic phosphorus and total soil phosphorus in both layers. Increase in Ca2 - P,Ca8 - P,Al - P,O- P,Ca10 - P and total soil P was significant in surface soil while their increase in the subsoil was relatively slight. A reverse tendency was observed for Fe - P, its increase being more significant in the 20 - 40 cm layer than in the 0 - 20 cm layer. Thus, the results suggest that under the influence of long practice of paddy - wheat rotation, P tends to move downwards. |
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| Keywords: | fix - point experiment inorganic - P forms distribution |
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