沈阳农业大学学报2011，Vol.42Issue(4)：465-469,5.
不同土壤水分能量及气象因子对水稻腾发量的影响
Effect of Different Soil Water Potentials and Meteorological Factors on Evapotranspiration of Rice
摘要
Abstract
Pot experiments were conducted to determine the influence of rice evapotranspiration caused by different status of soil water potential and meteorological factors. The variation of rice evapotranspiration and the effects on yield were researched in soil water potential controlling stage. The diurnal variation law of rice evapotranspiration in a typical day in controlling stage also was measured. Multivariate linear models were established by stepwise regression based on the meteorological datum and the data of evapotranspiration in a typical day under flood irrigation. The result showed that different soil water potential had a same influence trend for rice evapotranspiration, but had a dissimilar influence trend for rice yield. Evapotranspiration intensity curve of each treatment had a obvious peak value in a sunny day, but had no obvious rule in a cloudy day. Some meteorological factors including global radiation intensity, relative humidity, and wind speed were kept in the stepwise regression model. Evapotranspiration was influenced by the value of soil water potential in the same meteorological condition; global radiation intensity, relative humidity, and wind speed were meteorological factors which played a leading role in rice evapotranspiration under the same soil water potential.关键词
土壤水分能量/气象因子/水稻腾发量/日变化/逐步回归Key words
soil water potential/ meteorological factors/ rice evapotranspiration rate/ diurnal variation law/ stepwise regression分类
农业科技引用本文复制引用
陈伟,迟道才,张旭东,邰恩博,陈涛涛,张特男,吴秀明..不同土壤水分能量及气象因子对水稻腾发量的影响[J].沈阳农业大学学报,2011,42(4):465-469,5.基金项目
辽宁省教育厅重点实验室项目(2009S091) （2009S091）
辽宁省自然科学基金项目(20082122) （20082122）
辽宁省重大项目(2008NY01) （2008NY01）
辽宁省科技厅农业攻关重大项目(2008212003) （2008212003）
