Seedling Raising Model of Tray Overlay for Machine Transplanting Rice
ZHU Defeng;WANG Yuejun;CHEN Huizhe;XU Yicheng;CHEN Yiping;China National Rice Research Institute;Zhejiang Provincial Center of Agricultural Technology Extension;
With social economy development and rural labor transfer and cost rise in China, rice production is shifting from manual operation to the mechanization. The main task of rice production mechanization is the planting and the key is seedling raising for transplanting. In analysis and research of the problems and experience of traditional model of rice seedlings raising, the seedling rais-ing model of tray overlay was proposed. The characteristics of the model are listed below: using rice nursery matrix and rice tray that could be overlayed, trays that was sowed in seeding line and overlayed. Then, overlayed trays were put in temperature and humidity controlled seedling room. The temperature and humidity in the seedling room is maintained 31℃~32℃ and humidity 90%, respectively. When seedling height reached 0.5 cm after 48 h in the seedling room, trays could be moved to nursery. This model is consist of one seeding center and N seedling sites, 1+N model for seedling raising. A seedling center can provide seedling for transplanting in several hundred and thousand hectare area. The model improved the quality of seedling, increased the seedling rate by 20%, reduced the cost of seedling raising by 15%~20%, realized risk reduction for seedling raising and the utilization efficiency of nursery site and equipment.
【CateGory Index】： S233.71