Abstract:

To improve the level of nutrient management and cultivate seedlings, this paper studied the influence of controlled-release urea on tomato seedling growth through the experiment of seedling nursery in plug tray. The results showed that the co-situs application of PCU50 inhibited growth of tomato seedlings. The plant height, stem diameter and chlorophyll content decreased by 27.9%, 11.1% and 10.6% respectively compared to those of conventional seedling, while plant dry weight, root dry weight and seedling index decreased by 47.2%, 35.6% and 35.8%. However, PCU130 application increased the stem diameter, chlorophyll content and seedling index of tomato seedlings by 3.7%, 10.0% and 35.0% respectively in comparison to conventional seedling. Moreover, PCU130 treatment significantly increased both total root absorption area and root active absorption area by 95.1% and 44.7%. In conclusion, the fertilizer of PCU130 was suitable for tomato seedling growth.