日光温室黄瓜茎温与环境的相关性  

Correlation between the Cucumber Stem Temperature and Environment in Solar Greenhouse

作　　者：郭文忠[1,2] 曲继松[2] 陈青云[1] 高丽红[1] 曲梅[1] 徐永霞 

机构地区：[1]中国农业大学农学与生物技术学院,北京100091 [2]宁夏农林科学院种质资源研究所,银川750002 [3]宁夏吴忠市农业电视广播学校,吴忠751100

出　　处：《上海交通大学学报（农业科学版）》2008年第5期458-461,470,共5页Journal of Shanghai Jiaotong University(Agricultural Science)

基　　金：国家科技攻关项目(2007BAQ0005801);宁夏回族自治区科技攻关项目(2006-2008)

摘　　要：本文研究了不同水分处理下的黄瓜茎温的变化特征。研究表明,黄瓜植株茎温在不同的土壤含水量条件下表现出不同的日变化。在土壤水分亏缺状态条件下,黄瓜茎温在下午13:00时到15:00时升高,黄瓜植株茎温和温室空气温度的差值缩小。每天13:00时到15:00时的温差同样会随着生育期的延长而减少,尤其是在水分亏缺时更为明显。这种差值在较弱的光照总辐射和下午15:00时较高的饱和水汽压差也会缩小,每天的最大温差同样会随着生育期的延长而减少,尤其是在水分亏缺时更为明显。这种温差还随着土壤水分含量的降低而降低。在较短时间内温室气温、空气相对湿度和光照总辐射是决定植株茎温的主要因素。可以采用温室空气温度和黄瓜茎温的差值作为黄瓜结果中期缺水的指标或者间接断定土壤水分含量多少的参考依据。在黄瓜结果中期,在白天晴天13:00～15:00时,黄瓜茎温和空气温差小于1.55℃表明温室土壤处于水分亏缺状态,作为灌溉指标,当茎杆温温度和空气温差在1.55～4.23℃,应该要进行灌水。The variable character of cucumber stem temperature under different soil water content was researched in this paper. The result showed that the cucumber stem temperature had obvious daily change under soil drought condition, rose from 13：00 to 15：00 with the difference reduction between temperature of cucumber stem and greenhouse; the difference can be regarded as index of drought index or reference of soil water condition. The difference reduced with less light radiation and higher vapour pressure deficit, the highest temperature difference of the day reduced with the prolong of growth period, especially under water deficient condition. The temperature difference reduced with reduction of soil water content. In a Short time the air temperature, relative humidity and light radiation is major determinate factor to the stem temperature. When the difference of plant and air temperature is 1.55 ℃ that indicate the soil water is wane in solar shine date of 13：00-15：00 hour in the middle growth stage. As irrigation index, it should be irrigated when the difference of plant and air temperature is 1.55-4.23 ℃.

关 键 词：黄瓜 茎温 环境 相关性 

分 类 号：S642.226.5[农业科学—蔬菜学]