| 李树岩,刘荣花,马志红.基于降水距平的黄淮平原夏玉米干旱评估指标研究[J].干旱地区农业研究,2012,30(3):252~256 |
| 基于降水距平的黄淮平原夏玉米干旱评估指标研究 |
| Research on drought assessment index of summer maize base on precipitation anomaly |
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| DOI：10.7606/j.issn.1000-7601.2012.03.42 |
| 中文关键词: 夏玉米 趋势产量 气象产量 干旱指标 黄淮平原 |
| 英文关键词:summer maize trend yield meteorologieal yield drought index |
| 基金项目:公益性行业(气象)科研专项“农用天气预报关键技术研究”(GYHY200906021),“夏玉米高产稳产气象保障关键技术研究”(GYHY201006041)； 中国气象局农业气象保障与应用技术重点开放实验室研究基金项目“基于气候变化的河南省高产夏玉米水分条件研究”(AMF200910) |
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| 中文摘要: |
| 以降水和产量资料为基础,研究确定了夏玉米干旱评估指标。首先对历史产量序列进行处理,利用三次多项式拟合趋势产量,分离相对气象产量;分析不同生育阶段降水距平和相对气象产量的相关关系,结果表明,玉米出苗~抽雄期降水距平与相对气象产量呈显著的正相关;通过统计分析,建立了它们之间的回归方程,并结合农业干旱划分标准,确定了夏玉米生长季不同等级的农业气象干旱指标,即降水负距平<20%、20%~50%、50%~80%、>80%时,分别出现轻旱、中旱、重旱和严重干旱,产量分别减少<10%、10%~20%、20%~30%、>30%。 |
| 英文摘要: |
| The drought assessment index of summer maize was determined based on the relationship between precip-itation
and yield. Firstly, the history data series of yield were processed, trend yield was fitted using cubic polynomial, and the relative meteorological yield was detached; and then the relationship between precipitation anomaly in different growing phase and relative meteorological yield was analyzed. The result showed that precipitation anomaly from emer-gence to teaseling stage had significant positive correlation with relative meteorological yield. The regression equation was established through statistic analysis. The drought assessment index of summer maize in different grade was determined combined with division standard of agricultural drought. The index was: when negative precipitation anomaly was<20%,20%~50%,50%~80%,or>80%, the drought grade was slight drought, middle drought, heavy drought and serious drought, and the yield reduction was<10%, 10%~20%, 20%~30%, or>30%. |
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