南京地区水稻田N素径流流失模拟模型  

Modeling of Nitrogen Loss With Runoff From Paddy Field During Rice Growth Period in Nanjing Area

作　　者：卞立平[1] 焦隽[1] 李慧[1] 张卫建[1] 

机构地区：[1]南京农业大学应用生态研究所,江苏南京210095

出　　处：《生态与农村环境学报》2008年第3期89-93,共5页Journal of Ecology and Rural Environment

基　　金：国家科技支撑计划(2006BAD02A15);江苏省环保科技项目(2005012)

摘　　要：针对稻作水肥管理特点,建立了降雨-径流-N素流失模拟模型,根据实测与文献资料确定模型主要参数,并输入1951至2006年56a逐日降水资料运用自编程序进行计算机模拟运算,以分析南京地区降雨量与水田径流量及径流N流失量的关系。结果发现,除了降雨量和径流量影响径流N量以外,施肥日期及其与较强径流出现的时间间隔也对径流N量有很大影响。进一步分析表明,施肥后7d是降低水稻生长期径流N量的关键时期,6月中旬栽插有利于减少径流N的产生。Aiming at the characteristics of water and nutrient management of rice cultivation, a model （preeipitation-runoff-N loss simulation model, PRNSM） simulating rainfall-runoff-N-loss from paddy field was established with major parameters specified based on the data of field measurements and from the literature. Simulated calculation was earrid out on the basis of the daily precipitation data in the 56 years from 1951 to 2006, using a serf-written computer program to study relationship of runoff and N loss therewith with rainfall in Nanjing. Resuits show that besides amount of rainfall and flux of runoff, interval between the date fertilizer was applied and the date relatively strong runoff took place was also a major factor affecting amount of N loss with runoff. Further analysis revealed that the first 7 days after fertilization is the key period to reducing N loss with runoff during the rice growth period, and transplanting rice in mid-June contributes to the reduction of N loss with runoff.

关 键 词：水田径流 N素流失 系统模拟 

分 类 号：X52[环境科学与工程—环境工程] S143.1[农业科学—肥料学]