img

官方微信

高级检索

中国沙漠 ›› 2002, Vol. 22 ›› Issue (4): 354-358.

• 研究论文 • 上一篇    下一篇

科尔沁沙地农田玉米耗水规律研究

李玉霖, 张铜会, 崔建垣   

  1. 中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000
  • 收稿日期:2001-04-15 修回日期:2002-03-10 出版日期:2002-08-20 发布日期:2002-08-20
  • 作者简介:李玉霖(1970-),男(汉族),硕士,助理研究员,主要从事干旱半干旱区农田微气象研究。E-mail:naiman@ns.lzb.ac.cn
  • 基金资助:
    国家重大基础研究发展规划项目"中国北方沙漠化过程及其防治研究"(G2000048704);中国科学院创新项目(210048)资助

Water Consumption Law of Maize in Horqin Sandy Land

LI Yu-lin, ZHANG Tong-hui, CUI Jian-yuan   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2001-04-15 Revised:2002-03-10 Online:2002-08-20 Published:2002-08-20

摘要: 首先采用波文比-能量平衡法分析了科尔沁沙地农田玉米(Zeamays L.)不同发育阶段晴天的能量分配特征,在此基础上估算了玉米的蒸散量,并对估算结果和蒸渗仪测定结果进行比较,最后运用作物蒸散量和参考作物蒸散量计算了玉米的作物系数。结果表明:①在玉米的整个生长过程中,能量交换以水分蒸散耗热为主;②根据试验年份的降雨分布情况,该地区的自然降水不能满足玉米对水分需求,玉米各生育阶段水分亏缺比较严重;③科尔沁地区玉米4个生长阶段(苗期、营养期、生殖期、成熟期)的作物系数分别为0.52、0.90、1.13和0.64;④波文比能量平衡法可以较准确的估算玉米农田晴天时的蒸散量。

关键词: 玉米, 蒸散量, 参考作物蒸散量, 作物系数, 科尔沁沙地

Abstract: The Bowen ratio-energy balance method was used to analyze the energy exchange on maize cropland and further to estimate crop evapotranspiration at Horqin Sandy Land. The estimated results had been compared with the data measured by Lysimeter. Crop coefficients for maize calculated from crop evapotranspiration and reference evapotranspiration have been obtained. During growth seasons, latent heat flux occupied large amount of net radiation. The local precipitation of experimental year couldn t satisfy the water need of maize production. The calculated values of crop coefficient for maize at the four crop growth stages (initial, crop development, reproductive and maturity) were 0.52, 0.90, 1.13 and 0.64 respectively. Crop evapotranspiration can be estimated exactly by using Bowen ratio-energy balance method in a fine daytime.

Key words: Maize, crop evapotranspiration, reference evapotranspiration, crop coefficient, Horqin Sandy Land

中图分类号: