Latest Rice Straw Return-to-Field Technique Tutorial and Precautions

In rice cultivation there is a rice straw return-to-field technique. Rice straw contains various nutrients and organic substances needed for rice growth and development. After being returned to the field and decomposed, it can increase the organic and inorganic nutrients in the soil and improve soil structure, which is beneficial to high rice yields. So how should straw be returned to the field? What should be paid attention to? Let's take a look at the detailed introduction below.

1. Harvesting and stubble retention

Harvest immediately when the early rice matures. The length of the stubble retained depends on the height of the plants; if the plants are taller, the stubble is shorter, and generally about 80 cm is sufficient. Cut from the neck, and immediately after harvesting carry out plowing to press the rice stubble into the soil, then flatten the stems. After that, maintain a soil layer of about 5 cm and let it rot naturally. After 7-10 days of planting, drain the water and level the field until there are no shoe prints in the paddy field, then irrigate 7 cm to promote rice tillering and rooting, so that the nutrients from the rice stubble are absorbed by the rice.

2. Weeding and fertilizing

Before planting, weeding must first be carried out, so as to prevent weeds from absorbing sufficient nutrients and beginning to grow, which can easily cause a weed infestation and is unfavorable to the growth of rice seedlings. Generally, apply 0.75-1 kg of butachlor powder mixed with 15-20 kg of soil per mu, which can keep the field surface free of weeds. Before planting, generally apply 20 kg of ammonium carbonate per mu, or 5 kg of urea, 7.5 kg of potassium chloride, and 15 kg of superphosphate. During the seedling growth period, generally no further fertilizing is needed; at the heading stage, spraying a urea solution is sufficient.

After rice is planted, attention should be paid to the prevention and control of pests and diseases. Because rice decomposes nutrients during the rotting process, in the later stage rice is very susceptible to absorbing pests, so special control is needed. In addition, during the decomposition of rice straw, a large amount of bacteria may breed, and these will infect the plants and cause them to contract diseases, so attention should also be paid to this.

4. Precautions

When returning rice straw to the field, first pay attention to the amount used. Generally, 40~50% of the total fresh straw of the field is appropriate. If too much is used, it may cause poisoning of the seedlings. In addition, when transplanting rice, it should not be done too early; wait until the rice straw has rotted and fermented, then rake level and transplant. In order to speed up the decomposition rate of the rice straw, lime can be spread. Before the rice straw has completely rotted, it is not suitable to transplant rice, otherwise it will cause poisoning and death of the seedlings. When the rice straw is rotting and fermenting, the water in the field should be kept from flowing in or out, so as to avoid nutrient loss. After transplanting rice, topdress nitrogen fertilizer in time, so as to prevent microorganisms and seedlings from competing for nitrogen elements, which would cause poor growth of the seedlings.

The above is an introduction to the rice straw return-to-field technique and precautions. We hope it can help you. To learn more related knowledge, please keep following us.