当前位置: 首页 > 文章 > 土壤水分变化对冬小麦蒸腾速率的影响 河南农业科学 2010,39 (7) 10-14
Position: Home > Articles > Effects of Soil Moisture on Transpiration Rate of Winter Wheat Journal of Henan Agricultural Sciences 2010,39 (7) 10-14

土壤水分变化对冬小麦蒸腾速率的影响

作  者:
张红卫;陈怀亮;杨志清;高正庆
单  位:
河南农业大学;新乡市气象局;河南省气象科学研究所
关键词:
小麦;土壤水分;蒸腾速率
摘  要:
研究了不同土壤水分条件下小麦叶片蒸腾速率的变化特征,结果表明,(1)在土壤水分充足的条件下,蒸腾速率较土壤水分匮乏时偏高近1倍,表明土壤相对湿度的大小直接影响小麦蒸腾速率。(2)土壤相对湿度的大小影响蒸腾速率峰值的出现时间,土壤相对湿度越小,蒸腾峰值出现的越晚,土壤相对湿度越大,蒸腾峰值出现的越早。分析发现,无论土壤相对湿度高或低,蒸腾速率在16:00均出现较前后偏低的现象。(3)在土壤相对湿度62%左右,小麦蒸腾速率与外界环境条件之间的关系呈现与其他土壤相对湿度下不同的变化特征。(4)从蒸腾速率的多因子模拟结果看出,在不同土壤相对湿度下,影响蒸腾速率的主要因子不同,土壤相对湿度<62%时模拟效果较好,土壤相对湿度≥62%时效果较差。
译  名:
Effects of Soil Moisture on Transpiration Rate of Winter Wheat
作  者:
ZHANG Hong-wei1,2,CHEN Huai-liang2,YANG Zhi-qing3,GAO Zheng-qing1(1.Xinxiang Meteorological Bureau,Xinxiang 453000,China;2.Henan Institute of Meteorology,Zhengzhou 450003,China;3.Henan Agricultural University,Zhengzhou 450002,China)
关键词:
Wheat;Soil moisture;Transpiration rate
摘  要:
The changes of transpiration rate in wheat leaves were studied under different soil moisture treatments.The results were as follows:(1) The transpiration rate was about 100% higher in sufficient soil water conditions than in deficient ones;(2) The maximum value of transpiration rate varied with the changes of soil moisture.The peak value would be postponed along with the decrease of soil moisture;(3) An abnormal changing tendency of transpiration rate was found when the relative soil moisture was 62%;(4) The maximum and secondary transpiration rate appeared when the relative soil moisture was 82% and 46%,respectively;(5) The main factors affecting the transpiration rate were different under different soil moisture.The simulation result was better under 62% soil moisture,but became worse above 62%.

相似文章

计量
文章访问数: 9
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊