关键词: 水稻, 缩二脲, 白化, 叶绿素

Abstract:

In order to study on the effects of biuret on seedling rate and leaf bleaching characteristics of rice, an experiment in cultivation pool was conducted, Zhongzheyou 1 and Yongyou 1540 as materials. The results showed that the effects of biuret on rice seedling rate and seedling growth was less when biuret content in 0～2.0%． The seedling rate significantly decreased and the seedling growth significantly inhibited when biuret content more than 4.0%, the dry matter of Zhongzheyou 1 and Yongyou 1540 were reduced by 24% and 17% respectively. The leaves of rice were more sensitive to biuret and when the application of biuret more than 2.0% caused the leaves white, mainly in the second leaf. The excessive application of biuret significantly decreased the content of total chlorophyll and the ratio of chlorophyll a/chlorophyll b. Biuret is the main cause of albino seedling in direct seedling. In the production, the compound fertilizer with low biuret was recommended.

Key words: rice, biuret, albino, chlorophyll