典型大嵩江流域稻田CH_4和N_2O排放的分析与控制研究  

Analyses of Paddy Field CH_4 and N_2O Emissions and Management in the Dasongjiang Watershed

作　　者：王利华[1] 万海波[1] 邵小云[1] 齐家国[1,2] Wang Lihua;QiJiaguo;Wan Haibo;Shao Xiaoyun(Institute of Island and Coastal Research,ZhejiangUniversity,Zhoushan Zhejiang 316021,China;Center for Global Change and Earth Observations,Michigan State University,East Lansing MI 48824,USA)

机构地区：[1]浙江大学海岛与海岸研究所,浙江舟山316021 [2]密歇根州立大学全球变化与地球观察中心,美国密歇根州兰辛48824

出　　处：《科技通报》2017年第5期217-223,共7页Bulletin of Science and Technology

基　　金：政府间组织Asia Pacific Network(APN)的国际合作项目"Comparative Analysis of Pollution Sources at the Hangzhou Bay&Mekong River Mouths";ARCP2013-FP25-Wu

摘　　要：如何在保证水稻产量的同时减少稻田温室气体排放一直是学术界关注的重要问题。本研究在宁波市大嵩江流域内选取了12块稻田样地,在采集研究样地土壤特性和管理方式数据的基础上,使用DNDC(DeNitrification-DeComposition)模型模拟估算了不同管理模式下样地的水稻产量及其对应的温室气体CH_4(甲烷)和N_2O(氧化亚氮)排放量。结果表明,CH_4的排放量和稻田的淹水深度以及N_2O的排放量和N肥(尿素)的施用量之间均存在明显的相关关系——通过优化管理方式可以在保持水稻产量的同时实现温室气体减排。具体方式有:改变稻田淹水天数,选取高产低排稻种,控制N肥使用量和减少秸秆还田,然而其效果则又与土壤特性有很大的关系。There is a great deal of interest in reducing greenhouse gas emissions while maximizing paddyrice yield.This study selected12paddy rice fields in the Dasongjiang watershed in Ningbo,ZhejiangProvince,collected soil properties and field management data,and estimated CH4and NO2emissions aswell as yields using DNDC model.The results showed that the CH4emissions are well correlated with thepaddy flooding depths,and the N2O emissions are well correlated with the N fertilizer application rates.Simulated results suggested that appropriate field management practices can reduce the CH4or NO2emission while assuring yields,including altering flooding days,selecting the right cultivars,adjustingfertilizer application rate,and changing residue management.The effectiveness of these managementoptions are soil-type dependent.

关 键 词：DNDC模型 稻田管理方式 温室气体 CH4 N2O 

分 类 号：X511[环境科学与工程—环境工程]