| 三峡重庆库区柑橘园氮素平衡状况研究 |
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| 引用本文： | 周鑫斌,温明霞,王秀英,樊晓翠,孙彭寿,石孝均,李伟,戴亨林.三峡重庆库区柑橘园氮素平衡状况研究[J].植物营养与肥料学报,2011,17(1):88-94. |
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| 作者姓名： | 周鑫斌 温明霞 王秀英 樊晓翠 孙彭寿 石孝均 李伟 戴亨林 |
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| 作者单位： | 1.西南大学资源环境学院,重庆 400716; |
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| 基金项目： | 公益性行业科研专项，国家科技支撑计划，中央高校基本科研业务费专项资金 |
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| 摘 要： | 以三峡重庆库区柑橘种植农户调研资料和土壤测试分析数据为基础，从区域角度出发，分析了柑橘园生产体系中的氮肥施用特征和氮素平衡状况。结果表明: 果园氮肥投入量为409.7 kg/hm2，主要来源于复合肥和尿素; 其中通过有机肥投入的氮素水平为 76.51 kg/hm2，主要来源于畜禽粪尿; 柑橘园的总体氮盈余量为 363.9 kg/hm2，盈余量以奉节、江津和永川区较高; 果园氮素投入与氮养分盈余量之间存在极显著的正相关关系。说明过量施用氮肥是氮盈余量高的主要原因。随着氮盈余量增加，果园土壤全氮呈增加趋势，而土壤C/N呈下降趋势, 氮素盈余对土壤全氮的影响大于土壤有机质的影响。
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| 关 键 词： | 三峡重庆库区 柑橘园 氮素 平衡 |
| 收稿时间： | 2010-04-06 |
Soil nitrogen balance in citrus orchards of the Three Gorges area in Chongqing |
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| ZHOU Xin-bin,WEN Ming-xia,WANG Xiu-ying,FAN Xiao-cui,SUN Peng-shou,SHI Xiao-jun,LI Wei,DAI Heng-lin.Soil nitrogen balance in citrus orchards of the Three Gorges area in Chongqing[J].Plant Nutrition and Fertilizer Science,2011,17(1):88-94. |
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| Authors: | ZHOU Xin-bin WEN Ming-xia WANG Xiu-ying FAN Xiao-cui SUN Peng-shou SHI Xiao-jun LI Wei DAI Heng-lin |
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| Affiliation: | 1.College of Resources and Environmental Science,Southwest University,Chongqing 400716,China; |
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| Abstract: | Based on data collected from farmer interviews and agricultural statistics database, the characteristics of N fertlizaion and surplus were studied in the Three Gorges area of Chongqing city. The result shows that the average N application rate is about 409.7 kg/ha, with a main source of compound fertilizers and urea. The N input rate through manure application is 76.51 kg/ha，with a main source of animal waste and manures. There is N surplus in the orchards, and the surpluses in Fengjie, Jiangjin and Yongchuan are relatively higher than other regions. The average N surplus is 363.9 kg/ha. There is positive correlation between N surplus and applied N rate in orchards, which indicates excessive N fertilizer input leads to the increase of N surplus. Further, with the increase of nitrogen surplus, total nitrogen of orchard soil tends to increase, while the ratio of soil C/N tends to decrease, indicating that the influence of nitrogen surplus on soil total nitrogen is higher than soil organic matter. |
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| Keywords: | Three Gorges area of Chongqing city citrus orchards nitrogen balance |
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