The experiment to select the high yielding rice variety OM4900 to compare with the wheat variety has been studied previously.
Experimental layout
Seeds of 2 rice varieties are treated with warm water (45-50oC). Proceed to soak the seeds for 24 hours and incubate them for the next 36 hours before sowing the seeds. Seeds are sown on plastic trays within 7 days (make sure the rice plant has 3-4 cotyledons) will be harvested and crushed.
Sowing high yielding wheat and rice
The young rice juice obtained after grinding the sample is dried through a spray dryer at 160oC until it has a powder form (moisture reaches 7-8%).
Harvest time: evaluate the criteria as 8 days, 10 days and 12 days after sowing.
The treatments were arranged in a completely randomized design with 2 treatments (wheat and high yielding rice) and 3 replicates.
Monitoring criteria: yield (HSTH) and chlorophyll content on rice leaves (chlorophyll a, chlorophyll b, total chlorophyll).
Sampling of high yielding wheat and rice
Production process of young rice flour
Evaluation of the yield of young rice flour products obtained
Wheat flour recovery
Raw weight (g) Powdered weight (g) HSTH (%) % difference
8 NSG 80.09 1.07 1.33 100
10NSG 125.69 2.07 1.64 123
12NSG 69.00 1.79 2.59 195
The results of analysis of the recovery efficiency of wheat flour at 8 days, 10 days, 12 days after sowing showed that the product recovery efficiency at day 12 was the highest (2.59%) than 95% The yield on day 8 (1.33%) and was 23% higher than that on day 10 (1.64%).
High yield of aromatic rice flour recovery
Raw weight (g) Powdered weight (g) HSTH (%) % difference
8 NSG 127.41 1.42 1.11 100
10NSG 117.79 1.86 1.58 142
12NSG 188.15 2.39 1.27 114
The results of the analysis of the yield of high yielding rice flour at 8 days, 10 days, and 12 days after sowing showed the highest yield of young rice flour at day 10 (1.58%), higher than 42% performance on day 8 (1.11%) and 14% higher performance on day 8 (1.11%).
Comparison of HSTH (%) between wheat leaves and high yielding rice
Scaffolding of wheat (%) equivalence of high yielding rice (%) Difference (times)
8 NSG 1.33 1.11 1.2
10NSG 1.64 1.58 1.04
12NSG 2.59 1.27 2.04
Through the analysis data of the yield of wheat flour and high yielding rice flour, it was found that the yield of wheat was higher than that of high yielding rice. At day 8, the yield of wheat was 1.2 times higher than that of high yielding rice, and the yield of wheat was 1.04 times higher than that of high yielding rice at day 10 and 2.04 times that of day 12.
High yielding wheat and rice flour
Results of analysis of chlorophyll a content on rice leaves
Through analysis of chlorophyll a content on rice leaves, we found that chlorophyll a content of wheat was much higher than that of high yielding rice: 4.67 times higher at day 8, 4.50 times higher at day 10, however in On the 12th day, the chlorophyll a content of wheat was only 0.80 times that of high yielding rice.
In high-yielding rice, chlorophyll a content increased steadily over the period, however, from day 10 to day 12, chlorophyll content decreased sharply from 4.01 (mg/g) to 1.31 (mg/g).
Results of analysis of chlorophyll a (mg/g) content on rice leaves
8 days 10 days 12 days
Wheat 2.47a 4.01a 1.31b
High yield rice 0.53b 0.89b 1.62a
Difference (times) 4.67 4.50 0.80
CV(%) 0.3 0.2 0.7
LSD 0.05 0.01 0.01 0.04
Statistical difference *** *** ***
Note: Means in the table by column followed by one or more of the same letter are not statistically different in the LSD test at 5% significance level.
Results of analysis of chlorophyll b content on rice leaves
For chlorophyll b content, the content in wheat over the 8 days, 10 days and 12 days after sowing was higher than in high yielding rice and was stable across the measurements, not changing much with the time of sampling. .
Analysis results of chlorophyll b (mg/g) on rice leaves
8 days 10 days 12 days
Wheat 1.04a 1.05a 1.04a
High yield rice 0.44a 0.44a 0.43a
Difference (times) 2.36 2.38 2.41
CV(%) 0.53 0.52 0.52
LSD 0.05 1.38 1.35 1.35
Statistical difference ns ns ns
Note: Means in the table compared by column followed by one or the same letter are not statistically significant in the LSD test at 5% significance level.
Results of analysis of total chlorophyll content on rice leaves
From the obtained data, the total chlorophyll content of wheat and high yielding rice did not change much over the sampling period. The total chlorophyll content of wheat at all stages was about 2.52 times higher than that of high yielding rice.
Results of analysis of total chlorophyll content (mg/g) on rice leaves
8 days 10 days 12 days
Wheat 3.63a 3.64a 3.64a
High yield rice 1.44a 1.45a 1.44a
Difference (times) 2.52 2.51 2.52
CV(%) 0.63 0.63 0.63
LSD 0.05 5.6 5.6 5.6
Statistical difference ns ns ns
Note: Means in the table compared by column followed by one or the same letter are not statistically significant in the LSD test at 5% significance level.
*In general, the chlorophyll a, chlorophyll b and total chlorophyll contents of wheat were higher than those of high yielding rice. The chlorophyll a content varied greatly over the sampling period, but the chlorophyll b and total chlorophyll content in both rice varieties did not change much over time.
The research was conducted in order to improve the economic value of value-added products and exploit the nutritional value of rice, make use of the waste products of rice leaves to contribute to reducing the impact on the environment. Accordingly, building a process to produce young rice flour based on spray drying technique and without drying the raw materials before grinding will minimize the oxidation and loss of chlorophyll content in rice flour.
Nguyen Thi Van
Đăng ngày: 04/05/2020