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| 提高化肥利用率途径的土壤磁学研究 | |
| 引用本文： | 郭友钊,余煦明,郑文,周国华,刘占元,李磊,孙彬彬.提高化肥利用率途径的土壤磁学研究[J].物探与化探,2005,29(1):66-70. |
| 作者姓名： | 郭友钊 余煦明 郑文 周国华 刘占元 李磊 孙彬彬 |
| 作者单位： | 1. 中国地质科学院,地球物理地球化学勘查研究所,河北,廊坊,065000 2. 福建职业技术学院,福建,福州,355001 3. 浙江省地质调查院,浙江,杭州,311203 |
| 基金项目： | 中国地质调查局地质调查项目资助(基[2003]100-04-02) |
| 摘 要： | 通过土壤磁学的角度来探讨我国农业生产急需解决的前沿课题之一——提高化肥利用率问题。125组土壤磁化率、营养元素氮、磷、钾和有机碳含量数据来自杭嘉湖平原的平湖地区,分布在560 km2面积内的36个深度剖面。分析这批数据随深度的变化规律,发现非耕作层的土壤磁化率与钾、氮、磷含量具有较好的相关性,而与有机碳含量相关性较差,说明决定土壤磁性的矿物具有保持营养元素的能力。耕作层的土壤磁化率与有机碳、磷含量具有较好的相关性,而与氮、钾含量相关性较差。耕作层的土壤磁化率以及氮、磷和有机碳含量高于非耕作层的土壤磁化率以及氮、磷和有机碳含量,钾含量则相反。从非耕作层至耕作层,土壤磁化率增幅为23.8%,远低于氮增幅55.3%、磷增幅36.6%和钾减幅95.8%,说明该区存在化肥施用不均衡现象,导致土壤磁化率与营养元素含量关系的失衡。提高磁肥或磁化肥的施用量,是提高肥效的持久性与利用率的途径之一。 |
| 关 键 词： | 平原地区 土壤 磁化率 营养元素 化肥利用率 |
| 文章编号： | 1000-8918(2005)01-0066-05 |
| 收稿时间： | 2004-01-13 |
A SOIL MAGNETISM STUDY ON PAISING UTILIZATION RATIO OF CHEMICAL FERTILIZER |
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| Guo You-zhao,Yu Xu-min,Zheng Wen,Zhou Guo-hua,Liu Zhang-yuan,Li Lie,Sun Bin-bin.A SOIL MAGNETISM STUDY ON PAISING UTILIZATION RATIO OF CHEMICAL FERTILIZER[J].Geophysical and Geochemical Exploration,2005,29(1):66-70. | |
| Authors: | Guo You-zhao Yu Xu-min Zheng Wen Zhou Guo-hua Liu Zhang-yuan Li Lie Sun Bin-bin |
| Institution: | Guo You-zhao~1,Yu Xu-min~2,Zheng Wen~3,Zhou Guo-hua~1,Liu Zhang-yuan~1,Li Lie~1,Sun Bin-bin~1 |
| Abstract: | In the light of soil magnetism, this paper deals tentatively with the problem of raising utilizartion ratio of chemical fertilizer, one of the forefront subjects in agricultural production. 125 groups of data concerning soil magnetism, nutrient elements N, P, K and organic carbon were collected from Pinghu area of Hangzhou-Giaxing-Huzhou plain and are distributed in 36 depth profiles within 560 km~2. An analysis of the variation of these data with depths reveals that soil magnetism of the non-plough layer has a relatively good correlation with K, N and P but shows a rather poor correlation with organic carbon, suggesting that minerals responsible for soil magnetism have the capability of keeping nutrient elements. Soil magnetism of the plough layer is in relatively good correlation with organic carbon and P but shows a rather poor correlation with N and K. Soil magnetism, N, P and organic carbon are higher in the plough layer than in the non-plough layer, whereas things are just the opposite for K. From the non-plough layer to the plough layer, the increase of soil magnetism is 23.8%, much lower than the increase of N (55.3%) and P (36.6%) and the decreasing range of K (95.8%). This indicates that there exists disproportion in the application of chemical fertilizer in this area, which leads to the unbalance between soil magnetism and content of nutrient elements. Applying more magnetic fertilizer seems to be one of the ways for raising the effectiveness and persistence of the fertilizer. |
| Keywords: | plain area soil magnetic susceptibility nutrient element utilization ratio of fertilizer |
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