不同水分条件下棉花冠层光合有效辐射特征分析  

Characteristics Analysis of Photosynthetically Active Radiation of Cotton Canopy under Different Water Treatments

作　　者：黄春燕[1] 王登伟[1] 刘敏[1] 

机构地区：[1]新疆生产建设兵团绿洲生态农业重点实验室/石河子大学农学院,新疆石河子832003

出　　处：《新疆农业科学》2013年第10期1787-1792,1798,共7页Xinjiang Agricultural Sciences

基　　金：国家自然科学基金项目(30460060)

摘　　要：【目的】研究棉花不同水分条件下的吸收光合有效辐射(APAR)和光合有效辐射截获量(FAPAR)随生育期的变化特征,为实时、无损、快速监测棉花生育期的生长状况,提供理论依据。【方法】通过线性光量子传感器获取棉花新陆早13号和33号两品种5水分处理冠层6个生育时期的光合有效辐射(PAR),计算得到APAR和FAPAR,分析它们的日变化和生育期的变化规律。【结果】两品种5水分处理6个生育期的APAR日变化均呈抛物线曲线,早晨08:00和晚20:00的APAR都为最低,分别在14:00时和12:00时达到最大。它们的FAPAR日变化都呈字型曲线,上午和下午的FAPAR出现两个最大峰值,中午14:00时达最低峰值。两品种5水分冠层的APAR和FAPAR均在开花初期较低,盛铃末期达最低,分别在盛花期和开花结铃期达最大,随着生育期它们的APAR和FAPAR与棉花的生育进程一致,两品种5水分在各生育时期的APAR和FAPAR高低排列顺序均为W_5>W_4>W_3>W_2>W_1。【结论】棉花的不同水分状况影响其APAR和FAPAR的变化,利用棉花APAR和FAPAR的日变化及其随生育期的变化特征,可以诊断棉花的水分和生长状况。[ Objective ] This project aims to study the variational characteristics of absorbed photosyntheti- cally active radiation （APAR） and fractional interception of absorbed photosynthetically active radiation （FA- PAR） of cotton canopy with different water treatments at growth stages and provide a theoretical evidence for real time, nondestrnctively and rapid monitoring the growth status of cotton. [ Method ] Cotton Xinluzao No. 13, No. 33 were planted with five water treatments in an experimental field, their photosynthetically active ra- diation （PAR） of cotton canopy were recorded by a linear quantum sensor at the six key growth stages. Their absorbed photosynthetically active radiation （APAR） and fractional interception of absorbed photosynthetically active radiation （FAPAR） were calculated from PAR,meanwhile their diurnal change and variation of growth stages were analyzed. [ Result] There were all parabolic curve in the change of APAR of two cotton cultivars under five water treatments at the six growth stages, their minimum APAR values both occurred at 08 ： 00 am and 20：00 pm, their maximum APAR values occurred at 14：00 and 12：00 respectively. The diurnal change of FAPAR were both - shaped curve, their minimum peak values of FAPAR both occurred at 14 ： 00, two maximum peaks of FAPAR both occurred at forenoon and afternoon. APAR and FAPAR of two cotton cultivars reached the lower values at the initial flowering stage, the minimum values at later full boll stage, their maxi- mum values occurred at full flowering stage, flowering and boll -forming stage, respectively, the variation of APAR and FAPAR during the growth phase were in accordance with development progress of cotton. FAPAR sequences of two cotton cuhivars under five water treatments were all W5 〉 W4 〉 Ws 〉 W2 〉 WL at each growth period. [ Conclusion] Cotton with different water status affected their variation of APAR and FAPAR, the di- urnal change of APAR, FAPAR and the variational characteristics of cotton APAR

关 键 词：棉花 吸收光合有效辐射 光合有效辐射截获量 特性 分析 

分 类 号：S562.01[农业科学—作物学]