摘要
[目的]研究长时间尺度下生产方式的改变对梯田系统物质流动模式的影响,可为保护哈尼梯田、合理开发利用哈尼地区生态资源、实现哈尼梯田的可持续利用提供科学依据。[方法]文章采用人类活动净氮/磷输入模型(NANI/NAPI)对1985—1986年、2009—2020年元阳县两个不同发展时期的NANI和NAPI及其相关构成进行核算。[结果](1)元阳县NANI、NAPI整体呈现先上升后下降的趋势,NANI和NAPI在1985年分别为2914 kg/(km^(2)·年)和249 kg/(km^(2)·年),到2016年均达到最高值,分别为9860 kg/(km^(2)·年)和685 kg/(km^(2)·年),随后呈现下降趋势,到2020年分别降至6018 kg/(km^(2)·年)和321 kg/(km^(2)·年)。(2)NANI的4个组成中,食品/饲料净氮输入占20%~45%、沉降氮输入占12%~40%、作物固氮输入占6%~12%、肥料氮输入占5%~52%;NAPI的3个组成中,食品/饲料净磷输入3%~50%、肥料氮输入占32%~57%、非食品磷输入占19%~41%。(3)元阳县NANI/NAPI比值存在明显阶段性变化,1985年和1986年NANI/NAPI比值分别为11.7和11.0,至2018—2020年基本稳定在18.5~18.8左右。(4)从NANI、NAPI与其组成的相关关系看,NANI与食品/饲料氮输入的R2为0.81(P<0.01),与化肥氮输入的R2为0.81(P<0.01);NAPI与食品/饲料磷输入的R2为0.90(P<0.01),与化肥磷输入的R2为0.59(P<0.01)。[结论]元阳县NAPI与NANI变化趋势呈现高度一致,均为先上升后下降的阶段性变化,与当地生产方式的转变相契合。
This research aims to investigate the impact of long-term changes in production modes on the material flow patterns in terrace systems,so as to establish a scientific basis for preserving Hani terraced fields,promote sustainable development and ecological resources utilization in the Hani region,and achieve sustainable use in Hani terraced fields.To accomplish the purposes of this study,the Net Anthropogenic Nitrogen/Phosphorus Inputs model(NANI/NAPI)was used to calculate NANI and NAPI values and their relevant components during two different development periods in Yuanyang county,from 1985 to 1986 and from 2009 to 2020.The overall trend of NANI and NAPI in Yuanyang county showed an initial increase followed by a decrease.In 1985,NANI and NAPI were 2914 kg/(km^(2)·a)and 249 kg/(km^(2)·a),respectively.Both reached their highest values in 2016,with values of 9860 kg/(km^(2)·a)and 685 kg/(km^(2)·a),respectively,followed by a downward trend.The NANI comprised four components,each of which contributed to the overall NANI in the following ranges:food/feed net nitrogen input(20%to 45%),atmospheric nitrogen deposition(12%to 40%),crop nitrogen fixation(6%to 12%),and fertilizer nitrogen input(5%to 52%).The NAPI included three components,with food/feed net P(phosphorus)input accounting for 3%to 50%of the total NAPI.The contribution of P fertilizer application and non-food P application to the total NAPI was 32%~57%and 19%~41%,respectively.There was an observable stepwise change in the NANI/NAPI ratio in Yuanyang county,with NANI/NAPI ratios of 11.7 and 11.0 in 1985 and 1986,respectively.The NANI/NAPI ratios remained unvarying at approximately 18.5~18.8 from 2018 to 2020.Based on the correlation between NANI,NAPI,and their components,it was found that the R2 value between NANI and food/feed nitrogen input was 0.81(P<0.01),which was same as the R2 value between NANI and fertilizer nitrogen input.Similarly,the R2 value between NAPI and food/feed phosphorus input was 0.90(P<0.01),while the R2 value between NAPI and fertiliz
作者
李影
李玉义
雷秋良
杜新忠
武淑霞
王永庆
刘宏斌
Li Ying;Li Yuyi;Lei Qiuliang;Du Xinzhong;Wu Shuxia;Wang Yongqing;Liu Hongbin(Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Key Laboratory of Nonpoint Source Pollution Control,Ministry of Agriculture and Rural Affairs,Beijing 100081,China;State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China,Beijing 100081,China;Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;State Key Laboratory of Resources and Environmental Information System,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《中国农业资源与区划》
CSSCI
CSCD
北大核心
2023年第12期32-39,共8页
Chinese Journal of Agricultural Resources and Regional Planning
基金
国家自然科学基金项目“宁夏灌区典型农田氮磷迁移规律及其地表水水质响应机理研究”(U20A20114)
中国农业科学院基本科研业务费专项“哈尼梯田区农业生产绿色系统研究”(Y2021YJ12)。
