Development of closed-type transplant production system and discussion of its application mode for flue-cured tobacco
To overcome difficulties in seedling breeding in low temperature(the average temperature is 14.65 ℃ in March and April)areas and in areas receiving a low amount of sunlight(the average sunlight hour is 93.55 h in March and April),a closed-type transplant production system was designed and studied using flue-cured tobacco as the plant material.The system was used for breeding the tobacco seedlings and was compared with the floating system.The closed-type transplant production system shortened the breeding period,with the tobacco seedlings reaching the 5-leaf growth stage at approximately 25 d sooner than in the floating system.The stem diameter,dry weight of the roots,stems and leaves,root/shoot ratio,and rate of healthy seedlings were higher by 35%,160%,49%,8%,74%,and 84%,respectively,in the closed-type system than in the floating system.The costs of seedling breeding in the closed-type system with and without heeling-in(direct planting)were reduced by 70%and 21%,respectively,compared with the floating system.Our results showed that the closed-type transplant production system effectively mitigated the problems of long seedling age and low rate of healthy seedlings in low temperature areas and in areas receiving a low amount of sunlight without lowering the agronomic qualities of seedlings.Furthermore,this closed-type transplant system reduced the consumption of wetland peat,which is a non-renewable resource,thereby significantly reducing the cost of seedling breeding.This system can potentially solve transplant crop production problems encountered in low temperature areas and in areas receiving a low amount of sunlight in China.
closed-type seedling production system floating seedling production system flue-cured tobacco seedling
Jiang Hou-Long Li Na-Jia Xu An-Ding Yang Chao Wang Hong-Feng Chen Hai-Tao Shan Pei-Xiang Ding Wei
Chongqing Tobacco Science Research Institute,College of Plant Protection,Southwest University,Postdo Chongqing Tobacco Science Research Institute,College of Plant Protection,Southwest University,Postdo Chongqing Tobacco Science Research Institute,College of Plant Protection,Southwest University,Postdo
国内会议
北京
英文
1-12
2015-12-01（万方平台首次上网日期，不代表论文的发表时间）