不同施用硒肥方法对水稻硒含量和产量的影响

针对水稻各组织器官硒含量低的问题,采用田间管理、取样、室内分析与生物统计相结合的方法,设置对照(T1)、基施含硒有机肥(T2)、基施含硒有机肥且水稻抽穗期喷施2次水溶性硒肥(T3)、水稻抽穗期喷施2次水溶性硒肥(T4)、基施含硒有机肥且水稻抽穗期喷施2次含硒添加剂(T5)和水稻抽穗期喷施2次含硒添加剂(T6)6个处理,开展不同硒肥施用方法对水稻硒含量和产量的影响研究。结果表明：施用硒肥可以显著提高水稻籽粒及其他组织器官硒含量,各硒肥处理的水稻籽粒平均硒含量比对照高出2.8倍,各处理水稻各组织器官平均硒含量表现为茎叶>根系>籽粒。各硒肥处理水稻籽粒硒含量表现为T5>T3>T6>T2>T4。不同施用硒肥方法对水稻产量无显著影响。综合考虑水稻籽粒硒含量和经济效益,最安全有效的水稻施硒方法为亩基施含硒有机肥2kg且在水稻抽穗期分两次喷施水溶性硒肥(100mL/667m².次)。

Effects of Exogenous Selenium Application on Selenium Content and Yield Of rice

Aiming at the problem of low selenium content in various tissues and organs of rice, the effects of different application modes of selenium fertilizer on selenium content and yield of rice were studied by combining field management, sampling, indoor analysis and biological statistics. The results showed that the selenium content of rice tissues and organs could be significantly increased by applying selenium fertilizer, the selenium content of rice treated with selenium fertilizer was 2.3 times higher than that of the control, and the selenium content of roots and stems and leaves of rice was higher than that of grains. The selenium content of root, stem, leaf and grain of rice treated by each treatment was selenium fertilizer base application and leaf surface spraying > selenium fertilizer base application or leaf surface spraying > control. Different application methods of selenium fertilizer had no significant effect on rice yield. Considering the selenium content and economic benefits of rice grains, T3 ( base application and leaf spraying ) treatment is the safest and most effective way to apply selenium in rice.