| 长期施肥对盐渍化土壤肥力的影响 |
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| 作者姓名： | NIU Ling-An HAO Jin-Min DING Zhong-Yi LI Xin-Bo NIU Xin-Sheng ZHANG Bao-Zhong |
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| 作者单位： | [1]College of Resources and Environment, China Agricultural University, Beijing 100094 （China）. [2]Handan Agricultural School, Handan 056001 （China） |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 39300070） and the Natural Science Foundation of Hebei Province, China （No. 302438）. |
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| 摘 要： | The long-term effects of annual fertilizer applications on the fertility of salt-affected soils under the rotation system of wheat （Triticum aestivum L.） and maize （Zea mays L.） are not well documented. In 1984, research plots were established to test the effects of annual applications of different rates of nitrogen （N） and phosphorus （P） fertilizers on the fertility of a salt-affected soil （Typic Ustochrept） at the Quzhou Experimental Station, Quzhou County, Hebei Province, China. In October 2001, composite soil samples （0-20 and 20 40 cm） were collected from each plot and analyzed for soil fertility indices. Seventeen years of N and P fertilizer applications increased the soil organic matter （SOM） in the surface layer. With combined N, 270 （N1） and 540 （N2） kg N ha^-1 year^-1, and P, 67.5 （P1） and 135 （P2） kg P205 ha^-1 year^-1, fertilizer applications, total soil N mostly significantly decreased （P〈0.05）. Soil total P in the 0-20 cm layer of the P2 treatment significantly （P （0.05） increased as compared to those of the other treatments. Rapidly available P （RP） in the 0-20 cm layer of the N1P2 treatment was significantly higher than those in the other treatments except the P2 treatment; and RP in the 0-20 cm layer of the P2 treatment significantly increased as compared to those of the other treatments except the P1 and N1P2 treatments. RP in the subsurface soil layer （20-40 cm） of the P2 treatment （4.2 mg P kg^-1） was significantly （P〈0.05） higher than those in the other treatments. Nevertheless, long-term N fertilization did not significantly increase the alkali-hydrolyzable N in the soil. However, in the salt-affected surface soils the application of combined N and P fertilizers over 17 years significantly （P〈0.05） decreased rapidly available potassium （K）. The results suggested that while under long-term fertilizer applications some soil fertility parameters could be maintained or enhanced, careful monitoring of soil fertility was necessary as other nutrients such as K could become depleted.
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| 关 键 词： | 土壤 盐分 肥力 玉米 小麦 |
| 收稿时间： | 2005-05-15 |
| 修稿时间： | 2005-07-18 |
Long-term fertilization effect on fertility of salt-affected soils |
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| NIU Ling-An,HAO Jin-Min,DING Zhong-Yi,LI Xin-Bo,NIU Xin-Sheng,ZHANG Bao-Zhong.Long-term fertilization effect on fertility of salt-affected soils[J].Pedosphere,2005,15(5):669-675. |
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| Authors: | NIU Ling-An HAO Jin-Min DING Zhong-Yi LI Xin-Bo NIU Xin-Sheng and ZHANG Bao-Zhong |
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| Institution: | College of Resources and Environment, China Agricultural University, Beijing 100094 (China). E-mail: niulingan@163.com;Handan Agricultural School, Handan 056001 (China);College of Resources and Environment, China Agricultural University, Beijing 100094 (China). E-mail: niulingan@163.com;College of Resources and Environment, China Agricultural University, Beijing 100094 (China). E-mail: niulingan@163.com;College of Resources and Environment, China Agricultural University, Beijing 100094 (China). E-mail: niulingan@163.com;College of Resources and Environment, China Agricultural University, Beijing 100094 (China). E-mail: niulingan@163.com;College of Resources and Environment, China Agricultural University, Beijing 100094 (China). E-mail: niulingan@163.com |
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| Abstract: | The long-term effects of annual fertilizer applications on the fertility of salt-affected soils under the rotation system of wheat (Triticum aestivum L.) and maize (Zea mays L.) are not well documented. In 1984, research plots were established to test the effects of annual applications of different rates of nitrogen(N)and phosphorus (P) fertilizers on the fertility of a salt-affected soil (Typic Ustochrept) at the Quzhou Experimental Station, Quzhou Counts.Hebei Province. China. In October 2001, composite soil samples (0-20 and 20-40 cm) were collected from each plot and analyzed for soil fertility indices. Seventeen years of N and P fertilizer applications increased the soil organic matter (SOM) in the surface layer. With combined N, 270 (N1) and 540 (N2) kg N ha-1 year-1, and P, 67.5 (P1) and 135 (P2) kg P2O5 ha-1 year-1, fertilizer applications, total soil N mostly significantly decreased (P < 0.05). Soil total P in the 0-20 cm layer of the P2 treatment significantly (P < 0.05) increased as compared to those of the other treatments. Rapidly available P (RP) in the 0-20 cm layer of the N1P2 treatment was significantly higher than those in the other treatments except the P2 treatment; and RP in the 0-20 cm layer of the P2 treatment significantly increased as compared to those of the other treatments except the P1 and N1P2 treatments. RP in the subsurface soil layer (20-40 cm) of the P2 treatment (4.2 mg P kg-1)was significantly (P < 0.05) higher than those in the other treatments. Nevertheless, long-term N fertilization did not significantly increase the alkali-hydrolyzable N in the soil. However, in the salt-affected surface soils the application of combined N and P fertilizers over 17 years significantly (P < 0.05) decreased rapidly available potassium (K). The results suggested that while under long-term fertilizer applications some soil fertility parameters could be maintained or enhanced, careful monitoring of soil fertility was necessary as other nutrients such as K could become depleted. |
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| Keywords: | long-term fertilization maize salt-affected soil soil fertility wheat |
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