以核桃-白及复合经营模式作为研究对象,揭示不同树龄核桃冠层下辐射能与白及生长、产量和品质关系,为核桃白及高效复合经营提供依据.采用数字植物冠层分析仪采集漾濞泡核桃不同树龄(10、20、30、40a)样树的冠层图像,使用分析软件获取冠层下辐射能参数,同时对林下白及叶绿素SPAD值(Soil and Plant Analyzer Development)及各部分生物量、块茎折干率进行测定,并对相关数据进行整理、比较和统计分析.结果显示:5-10月4个树龄核桃树冠层下的辐射能均呈先减少后增加的趋势,各树龄下白及叶绿素SPAD和整株生物量的变化趋势基本一致.林下白及生长状况受核桃树冠层和林下辐射能影响较大,相关性分析结果显示,白及叶绿素SPAD值及各部分生物量与核桃树冠层下的辐射能显著负相关.30 a和40 a生核桃林下白及有较大的生物量,10 a和其他树龄核桃树林下白及的生物量存在显著差异(P＜0.05).随着树龄的增长核桃树冠幅变大,林下的光照和辐射能则随之减弱,相对较弱的核桃林下的光照环境更有利于白及生长.
Interplanting Effect of Bletilla striata in Walnut Orchard with Different Canopy Coverage
Taking the compound management model of walnut and Bletilla striata as the research object,the relation-ship between radiant energy and growth,yield and quality of B.striata under different ages of walnut canopy was re-vealed,providing a basis for efficient compound management of walnut.The digital plant canopy analyzer was used to collect crown images of 10,20,30,and 40-year-old walnut trees.The canopy image analysis software was used to obtain the Radiant energy parameters under the canopy.The radiation parameters beneath the canopy were obtained using image analysis software.At the same time,the SPAD value and the biomass of each part,and the tuber drying rate were measured,and the relevant data were collated,compared,and statistically analyzed.From may to october,the radiant energy under the canopy of walnut trees of four tree ages decreased first and then increased,and the change trend of SPAD and the biomass of the whole plant under each tree age was basically the same.The growth status of undergrowth B.striata was greatly affected by the canopy and undergrowth radiant energy of walnut trees.the correlation analysis results showed that the SPAD value and biomass of each part of B.striata were signifi-cantly negatively correlated with the radiant energy under the canopy of walnut trees.30a and 40a have significant biomass,while there is a significant difference(P＜0.05)in the biomass of B.streata under walnut forests at 10a and other tree ages.With the growth of tree age,the canopy width of walnut tree becomes larger,and the light and radiant energy under the forest are weakened.The relatively weak light environment under the walnut forest is more conducive to the growth of B.striata.
walnutBletilla striatadifferent tree agescompound management
万方数据
维普
