施肥对小麦冠层温度的影响及其与生物学性状的关联  

Effect of fertilization on the canopy temperature of winter wheat and its relationship with biological characteristics

作　　者：周春菊[1] 张嵩午[1] 王林权[2] 苗芳[1] 

机构地区：[1]西北农林科技大学生命科学学院 [2]西北农林科技大学资源与环境学院,陕西杨凌712100

出　　处：《生态学报》2005年第1期18-22,共5页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目 ( 3 0 2 70 766)~~

摘　　要：利用红外测温仪等研究了不同施肥处理对小麦冠层温度的影响。结果表明 :不同施肥处理可改变小麦基因型的冠层温度 ,对于同一基因型品种 ,养分胁迫越严重 ,冠层温度越高 ;籽粒灌浆期旗叶叶绿素含量、可溶性蛋白质含量、蒸腾速率、净光合速率及一些农艺性状与冠层温度呈显著负相关。这表明 ,优良的生物学性状和较低的冠层温度相联系 ,冠层温度的高低可能成为反映水。Remotely sensing infrared canopy temperature is an efficient way to rapidly and non-destructively monitor the whole-plant response to water stress. It has often been used as a screening tool to select genotypes with drought and heat tolerance. It is reported that the drought-stressed plants show higher canopy temperature than the well-watered plants at both the vegetative- and anthesis growth stages. However, there is little information available about the effects of nutrient stress on the canopy temperature of crops. The objective of our experiment was to study the effect of different fertilization treatments on the canopy temperature of winter wheat (Triticum aestivum L.) by using infra-red thermometry. Field experiments were conducted from 2000 to 2003 at the Agricultural Experimental Station of Northwestern Sci-Tech University of Agriculture and Forestry, Yangling, Shaanxi Province, China. It is a sub-humid area susceptible to drought. We examined canopy temperature in five cultivars of winter wheat: Xiaoyan 6, Shaan 229, RB6, NR9405 and 9430. Previous studies indicated that the mean canopy temperature of these varieties after anthesis was different. Each variety received four fertilizer treatments: CK (no fertilizer), N fertilization (513.6kg/hm^2 urea), P fertilization (409.9kg/hm^2 triple super-phosphate) and NP fertilization (513.6kg/hm^2 urea plus 409.9kg/hm^2 triple super-phosphate). The treatments (variety×fertilizer) were factorially arranged in a 5×4 randomized complete block design. Each treatment was replicated three times. The area of each plot was 1.5m×1.2m (1.2m long, 6 rows at 25cm apart). The soil is classified as Eum-Orthic Anthrosol, equivalent to an Udic Haplustalf in the USDA system. The soil had the following characteristics: OM, 15.32g/kg; total-N, 0.73g/kg; NH^+_4-N, 6.28mg/kg; NO^-_3-N, 26.43mg/kg; available P, 18.20mg/kg; and available K_2O, 201mg/kg. Beginning at ear emergence, the canopy temperature of the wheat was measured using a hand-held infra-red thermometer (BAU-I, C

关 键 词：小麦 冠层温度 不同施肥处理 生物学性状 

分 类 号：S512.1[农业科学—作物学]