适合马铃薯块茎计算机断层扫描原位观察的栽培基质筛选  

Cultivated Substrates Evaluation for in-situ Observation of Potato Tubers Using Computed Tomography

作　　者：谭杰 刘建刚 刘菊 简银巧 李广存[1] 金黎平[1] 徐建飞[1] TAN Jie;LIU Jiangang;LIU Ju;JIAN Yinqiao;LI Guangcun;JIN Liping;XU Jianfei(Key Laboratory of Biology and Genetic Improvement of Tuber and Root Crops,Ministry of Agriculture Rural Affairs,State Key Laboratory of Vegetable Biobreeding,Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China)

机构地区：[1]中国农业科学院蔬菜花卉研究所,农业农村部薯类作物生物学和遗传育种重点实验室,蔬菜生物育种全国重点实验室,北京100081

出　　处：《园艺学报》2023年第5期1085-1094,共10页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(32172090,31771860);国家现代农业产业技术体系建设专项资金项目(CARS-09)。

摘　　要：土壤的不透明性阻碍了马铃薯块茎生长过程的直接可视化,而计算机断层扫描(Computed tomography,CT)技术可避免破坏性取样,实现植株地下生长过程实时连续观测。为了筛选马铃薯块茎CT成像效果好的栽培基质,对6种不同含水量基质的CT成像效果、数据提取效果和植株生长状态进行了对比分析。结果显示,过筛草炭的植株地上部分生长状况最佳,过筛草炭、蛭石与过筛草炭混合两种类型基质中块茎干、鲜质量最高。除蛭石基质以外,其他基质成像效果均随含水量降低而改善,但基质含水量过低导致植株无法正常生长。相同含水量条件下,过筛草炭的扫描背景杂质最少、成像效果最佳,可获得更清晰的CT图像。因此,在适宜植株正常生长的含水量条件下,即20%左右含水量条件下,过筛草炭是适合CT扫描观测马铃薯块茎生长发育的栽培基质。Soil hinders visualization in tuber growing and developing process,while Computed tomography(CT)technology can avoid destructive sampling and be applied on real-time observation for underground parts of plant.In order to select the cultivation substrate with good CT imaging of potato tubers,CT imaging effect,data extraction and plant growth parameters of six common cultivation substrates with different water content were compared and analyzed.The results showed that potato overground parts in sieved turf grew best,and furthermore,dry weight and fresh weight of tubers in sieved turf or vermiculite sieved turf were the highest among all substrates.Except for vermiculite,the CT imaging can be improved with water content of substrates decreasing whereas potato plant can not grow normally under serious water shortage.In comparison to other substrates with same water content,there are less background impurities and better CT imaging sieved turf has.Therefore,sieved turf with 20%water content is a suitable cultivation substrate to observe tuber development using CT scanning.

关 键 词：马铃薯 块茎 CT 基质 生长发育 

分 类 号：S532[农业科学—作物学]