Detailed Explanation of Key Points for Cultivating Colored Rice

Nutritional and health rice, namely red rice, black rice, and fragrant rice, are traditional premium and precious rice varieties in China.

I. Fragrant indica rice. It ranks first among the four premium rice varieties first recommended by the Rice and Rice Products Quality Supervision and Testing Center of the Ministry of Agriculture. After testing and evaluation of 12 indicators, all exceed the first-grade rice standards. Its grains are jade-like in color, and the content of trace elements, especially selenium, is very high, making it the best variety for developing pollution-free green food. The fragrant indica rice plant height is 100 cm, about 150 grains per panicle, 1000-grain weight 28 g, usual yield 500-550 kg per mu, and the whole growth period is 136-140 days.

II. Extra-premium red rice. The color is reddish and crystal-clear like agate, with a fragrant aroma, good-looking and delicious, and has the effects of selenium enrichment, blood supplementation, and beauty and health enhancement. The whole growth period of red rice is 138 days, plant height 95 cm, strong tillering ability, strong disease resistance, 1000-grain weight 26 g, and usual yield about 500 kg per mu.

III. Rare black rice. The grain color is glossy black, with a rich and pure aroma. The content of the 17 essential amino acids and iron in black rice is 1-2 times that of ordinary rice. The black rice plant height is 100 cm, tolerant to fertilizer and resistant to lodging, with strong disease resistance, highly resistant to bacterial leaf blight, lightly affected by sheath blight, and matures with green stems and leaves in the later stage. The panicle is large, generally 200 grains, the grains are ink-black and slender, 1000-grain weight 25 g, and the usual yield is about 450 kg per mu, with high yield reaching about 1000 jin.

Cultivation key points: 1. Sow and raise seedlings at the appropriate time in early to mid-May. 2. Use wide rows and narrow plant spacing, insert enough basic seedlings, with a density of 20,000 hills per mu and 80,000-100,000 basic seedlings. 3. Apply balanced fertilization according to a formula, appropriately reduce the amount of nitrogen fertilizer, increase the application of phosphorus and potassium fertilizers, and improve rice quality. 4. Prevent and control pests and diseases, using high-efficiency and low-toxicity biological pesticides to ensure rice quality. 5. Strengthen field management and harvest at the appropriate time.