权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of an optimal light environment control system for low light irradiation-low temperature storage of transplants

移植物弱光照射-低温保存最佳光环境控制系统的研制

基本信息

批准号：
15380169
负责人：
FUJIWARA Kazuhiro
金额：
$ 4.16万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15380169/
关键词：
low temperature storage low light irradiation light emitting diode red light blue light PPFD transplant automatic control CO_2濃度

项目摘要

The following two matters were addressed towards the development and practical application of an optimal light environment control system for low light irradiation (LLI)-low temperature storage of transplants : (1)development of an automatic control system of photosynthetic photon flux density (PPFD) for maintaining the CO_2 exchange rate of transplants at zero, resulting in suppressing the change in dry weight of transplants during long-term storage, and (2)investigation of the effect on the quality of grafted tomato plug seedlings (GTPSs) of blue-light PPFD percentage during red and blue light-emitting diodes (LEDs)-LLI storage. A series of system operating tests with GTPSs were firstly carried out, and the storage system was then completed through improvements and modifications of the hardware configuration and PID parameters based on the operating tests. Secondly, storage experiments with GTPSs were carried out under a constant PPFD condition throughout the storage, and an improving tendency was observed by increasing the percentage up to 50% of blue-light PPFD in visual quality scores. The results indicated that the 50% of blue-light PPFD was the best percentage among the tested ones and increasing the percentage up to 50% contributed to quality improvements for LLI storage of GTPSs. Finally, GTPSs were stored with the completed storage system at 10℃ for 35 d under four different LLI conditions : fixed red light irradiation at 2 μmol m^<-2> s^<-1>, PID-controlled red light irradiation with no blue light, and PID-controlled red light irradiation with blue light at 0.2 or 1.0 μmol m^<-2> s^<-1>. The results showed that the automatic PPFD control during LED-LLI helped suppress changes in dry weight during storage as expected. Furthermore, it was found that addition of a low percentage of blue light improved the morphological appearance of the GTPSs and reduced the PPFD required to suppress the change in dry weight.

以下两个事项是针对低光照射（LLI）-移植物低温储存的最佳光环境控制系统的开发和实际应用而解决的：（1）建立了一套光合光子通量密度（PPFD）自动控制系统，使CO_2交换率保持在零，导致抑制移植物在长期储存期间的干重变化，（2）研究了红光和蓝光LED（LED）照射期间蓝光PPFD百分比对嫁接番茄穴盘苗（GTPSs）质量的影响。LLI存储。首先对系统进行了一系列的GPS运行试验，在此基础上对系统的硬件配置和PID参数进行了改进和修改，完成了存储系统的设计。其次，在整个贮藏过程中，在恒定的PPFD条件下进行了GTPS贮藏实验，通过将蓝光PPFD的百分比增加到50%，观察到视觉质量评分的改善趋势。结果表明，50%的蓝光PPFD是最好的比例在测试的，并增加到50%的百分比有助于改善GTPS的LLI贮藏品质。最后，在4种不同的LLI条件下，将GTP与完整的储存系统一起在10℃下储存35 d：2 μmol m^ s^的固定红光照射<-2><-1>，不含蓝光的PID控制红光照射，以及0.2或1.0 μmol m^ s^的PID控制红光照射<-2>蓝光<-1>。结果表明，LED-LLI期间的自动PPFD控制有助于抑制储存期间干重的变化。此外，发现添加低百分比的蓝光改善了GTPS的形态外观，并降低了抑制干重变化所需的PPFD。