水稻泥质法育秧秧苗根部土坨稳定性研究

Study on Stability of Root Soil Particles of Rice Seedling Cultured on Slurry Nursery

水稻秧苗根部土坨的稳定性是衡量秧苗质量的重要指标,也是评价不同育秧方法的重要技术参数.采用抖落、浸泡、自由落体3种方法测定了泥质法和营养土法育秧秧苗根部土坨稳定性.结果表明,泥质法育秧秧苗根部土坨的破碎率均小于6％,而营养土法育秧秧苗根部土坨破碎率高达50％,是前者的4～10倍.从而进一步揭示了泥质法育秧的优势机制,指出了提高秧苗根部土坨稳定性的途径.

The stability of the root soil particles of rice seedling is an important index to evaluate rice seedling quality,and it also is an important technical parameter to evaluate methods of raising seedlings.In this study,the stability of the root soil particles of rice seedling from slurry nursery and nutrient soil nursery was tested by shaking,soaking and freely falling body.The results showed that the broken rate of the root soil particles of rice seedling from slurry nursery was less than 6%,but the broken rate of the root soil particles of rice seedling from nutrient soil nursery was about 50%.The results also showed that slurry nursery was a better way to improve the stability of the root soil particles of rice seedling.