社会经济因素对涪江流域土壤氮素的影响  

Impact of Socio-economic Factors on Soil Nitrogen in Fujiang River Basin

作　　者：朱林富[1,2] 李婷[2] 张世熔[2] 杨华[1] 吴建峰[1] 

机构地区：[1]重庆师范大学地理科学学院GIS应用研究重庆市高校重点实验室,重庆401331 [2]四川农业大学资源环境学院四川省土壤环境保护重点实验室,四川成都611130

出　　处：《水土保持通报》2015年第2期37-41,共5页Bulletin of Soil and Water Conservation

基　　金：国家科技支撑计划项目"西南地区种养业废弃物循环利用技术集成与示范"(2012BAD14B18);"四川新农村建设技术集成与示范"(NC2010RE0057);国家自然科学基金项目(40771135)

摘　　要：[目的]了解四川省射洪县土壤氮素的空间分布特征及社会经济因素对其的影响。[方法]以随机采样的土壤样点数据为基础,并结合社会经济数据,运用ArcGIS 9.3的地统计学、空间分析等方法进行分析研究。[结果](1)该县土壤全氮含量1.08±0.29g/kg,碱解氮含量100.24±34.80mg/kg;全氮高值区(>1.4g/kg)位于严家沟和向家营附近,在碾槽坝等地形成两个低值区(<0.9g/kg);碱解氮高值区(>140mg/kg)主要在万柏山和鲜家坪,低值区(<80mg/kg)主要位于碾槽坝等地带;(2)随着距离的增加,城镇周围全氮先增加后减少,碱解氮逐渐减少;道路周围全氮没有变化,而碱解氮逐渐降低;宅基地周围全氮没有变化,而碱解氮逐渐增加;(3)不同类型、不同地貌区的城镇、道路和宅基地,对土壤氮含量的影响存在很大的区域差异;(4)不同的氮肥、磷肥和有机肥施用量对土壤氮含量影响不同,其中氮肥对碱解氮影响明显。[结论]社会经济因素对土壤氮素的影响具有明显的区域差异性。[Objective] The spatial distribution patterns and socio-economic factors on soil nitrogen were stud- ied in Shehong County of Sichuan Province. [Methods] Based on the random sampled soil nitrogen data, and social and economic data, geostatistics and spatial analysis of ArcGIS 9.3 were used. [Results] （1） the contents of soil total nitrogen（TN） and alkali hydrolyzable nitrogen（AHN） were 1.08 ±0.29 g/kg and 100.24±34.80 mg/kg respectively. The regions with highest value（〉1. 4 g/kg） of TN contents were mainly distributed in Yanjiagou and Xiangjiaying, the regions with lowest value（〈0.9 g/kg） located in Niancaoba; The regions with highest value（〉140 mg/kg） of AHN contents were mainly distributed in Wanbaishan and Xianjiaping, the regions with lowest value（〈80 mg/kg） were mainly located in Niancaoba. （2） The TN contents increased firstly then decreased with the increase of distances around the towns, while the AHN contents reduced gradually; The TN contents were unchanged, while the AHN contents reduced gradually near roads; The TN contents were not changed, while the AHN contents were increased gradually in near by homesteads; （3） The contents of soil nitrogen were influenced greatly by the regional location around towns, roads and homesteads; （4） There were some differences of the contents of soil nitrogen for different nitrogenous fertilizer, phosphatic fertilizer and organic manure fertilizer, but the AHN contents were tightly tied to nitrogenous fertilizer. [Conclusion] To sum up, the impact of soil nitrogen of socio-economic factors had obvious regional difference.

关 键 词：全氮 碱解氮 地统计学 缓冲区 施肥 

分 类 号：S153.61[农业科学—土壤学]