基于冠层叶-气温差的温室土壤水分诊断

ISWC OpenIR > 水保所知识产出(1956---)

	基于冠层叶-气温差的温室土壤水分诊断
其他题名	Diagnosis of soil moisture in greenhouse based on canopy
	刘婵; 范兴科
	2012
发表期刊	干旱地区农业研究
卷号	30 期号:01 页码:90-93
摘要	根据对日光温室条件下番茄全生育期的冠层温度、气温、土壤水分以及一些相关气象因素测定,分析了冠层叶-气温差与土壤容积含水率、湿度之间的关系。结果表明:在日光温室条件下,番茄全生育期内冠层叶-气温差的日变化呈曲线分布,冠层叶-气温差的最高值出现在每天的13∶00～15∶00之间。通过对主要生育期13∶00～15∶00的数据分析发现,冠层叶-气温差(△T)与土壤容积含水率(SW)以及棚内湿度(RH)之间有较好的复相关关系,结合容积含水率与湿度对冠层叶-气温差的综合影响,可以得出△T与SW呈负相关关系,与RH呈正相关关系,相关系数R2为0.778。通过偏相关分析,冠层叶-气温差与容积含水率的相关性最大,呈负相关关系,相关系数R2为0.778,并通过数据验证,实测值(Y)与模拟值(X)相关性较好,相关系数R2为0.723。因此可通过监测13∶00～15∶00的冠层叶-气温差来了解作物的水分状况,为农田土壤水分诊断提供科学依据。更多还原
其他摘要	According to measured result of canopy temperature, air temperature, soil moisture and some relevant meteorological factors during tomato. s whole growth in sunlight greenhouse conditions, analysis was made respectively of the relationship between canopy lea-f air temperature difference and soil water content and relative humidity. The result showed that : In the sunlight greenhouse condition, there were some peaks in the diurnal curve of canopy lea-f air temperature difference from tomato. s seedling stage to fruiting period, and the maxmum of canopy lea-f air temperature difference. s value appeared during 13B00~ 15B00 each day. Accoding to the data at 13B00~ 15B00 in tomato. s main growth period, we found that there was a significantly good correlation among canopy lea-f air temperature difference ( vT ) , water content ( SW) and relative humidity ( RH ) , combined with water content and relative humidity on the comprehensive influence of the vT. We can get a result which is the vT has a negative relationship with water content and has a positive with relat ive humidity, R 2 is 0. 778. By partial correlation analysis, we concluded that the SW was the most important factor which affected vT, which was a negative linear correlat ion equat ion, and the R 2 is 0. 778. After validated with the measured data, it was found that the measured SW ( Y) was well correlated with the simulated one ( X ) , and R2 is 0. 723. Therefore, we could get scientific basis for diagnosis of farmland soil moisture from the water status data which was monitored from canopy lea-f air temperature difference at 13B00~ 15B00.
关键词	番茄 Tomato 冠层叶-气温差 Canopy Lea-f Air Temperature 容积含水率 Soil Volumetric Moisture Content 气象因子 Meteorological Factor 蒸腾蒸发量 Evapotranspiration
语种	中文
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/5366
专题	水保所知识产出(1956---)
推荐引用方式 GB/T 7714	刘婵,范兴科. 基于冠层叶-气温差的温室土壤水分诊断[J]. 干旱地区农业研究,2012,30(01):90-93.
APA	刘婵,&范兴科.(2012).基于冠层叶-气温差的温室土壤水分诊断.干旱地区农业研究,30(01),90-93.
MLA	刘婵,et al."基于冠层叶-气温差的温室土壤水分诊断".干旱地区农业研究 30.01(2012):90-93.

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