摘要
以天水市境内7个气象站1961-2005年（代表站1936-2005年）的逐月、逐年降水资料及干旱灾害发生的次数、造成粮食减产等数据为基本资料，运用数理统计方法分析干旱灾害的时间分布特征及造成的损失程度。得出1961～2005年干旱发生的频率呈上升趋势，一年之内干旱发生的频率以伏旱最高，春旱最低。提出了干旱灾害对主要粮食作物产量的影响系数，建立了定量评估模式，并对粮食作物的种植风险程度进行了评述。
Based on .the monthly precipitation, yearly precipitation of 7 weather stations in Tianshui 1961 2005 （represent station 1936-2005）, frequency of drought disaster and the yield reduction caused by drought disaster, the frequency of drought disaster in temporal distribution and degree of loss had been analyzed. The resuits showed that the frequency of drought had been increased from 1961 to 2005; the highest frequency of drought disaster was in hot summer while the lowest was in spring in a year. The effective coefficient of drought disaster to main crop has been given and the assessment of degree of risk to planting crop also has been made.
出处
《干旱地区农业研究》
CSCD
北大核心
2007年第1期167-171,共5页
Agricultural Research in the Arid Areas
基金
科技部科研院所社会公益研究项目"中国干旱气象灾害监测预警方法研究"(2004DIB5J192)
甘肃省科技攻关计划"甘肃干旱生态环境对全球气候变暖的响应及减灾技术的研究"(2GS042-A44-017)
关键词
干旱气候
农作物
产量评估
陇东南
drought climates crop
yield assessment
Southeast of Gansu
