Effects of Spraying Selenium and Magnesium Nutrient Solution on Yield and Quality of Rice

In order to promote the production of complex functional rice, a field experiment was carried out to study the effects of foliar spraying of selenium and magnesium nutrient solution on yield and quality traits of rice by spraying 100 mg·kg^-1 organic selenium nutrient solution(Se ≥ 1 000 mg·kg^-1) at the early stage of rice filling and setting five magnesium concentrations(0,200,400,600 and 1 000 mg ·kg^-1, M1-M5). The results showed that the yield traits, appearance quality and processing quality of rice treated with organic selenium nutrient solution alone were higher than those treated with selenium and magnesium; The yield of treatment with magnesium concentration greater than 600 mg ·kg^-1（M4） was significantly lower than that of treatment with low magnesium concentration. With the increase of magnesium concentration, the appearance quality, processing quality and taste value of rice were improved. When the magnesium concentration reached 1 000 mg ·kg^-1（M5）, the perfect grain of rice was the lowest, 57.83%, while the chalkiness rate and chalkiness reached the highest, with an average increase of 2.93 and 4.35 percentage points compared with other treatments; High concentration of magnesium had a greater impact on the appearance quality of rice, but had a smaller impact on the processing quality such as brown rice rate and milled rice rate. Although the brown rice rate and milled rice rate of M4 and M5 treatments were 2.89 and 2.06 percentage points higher than that of M3 treatments, the head rice rate was 2.59 percentage points lower than that of M3 treatment, while the broken rice rate was 5.59 percentage points higher than that of M3 treatment; Simultaneous application of selenium and magnesium could increase the content of selenium and magnesium in rice and enhance the taste value of rice. The comprehensive score of taste value was higher when the concentration of magnesium is 400 mg ·kg^-1.