Several operating methods of Rice dry farming in Foreign countries

This new method has been invented by Tess Farm in New Orleans, USA. Specific operation method: on the wet no-tillage land, a small drill seeder (machine) is used to drill a hole in the soil with a diameter of about 3cm and a depth of 13-15cm. When drilling, two rice seeds are sown immediately. After sowing, the hole is covered with soil fertilizer, and the hole is filled with water, and the soil around the hole is only wet as straight. In general, no water can be given within 40 days after planting, so that the roots of rice mu can grow deep and have strong roots, which can effectively absorb underground water. While rice seedlings are growing, weeding can be done once between rows (weeding pine 2-3cm deep soil). This not only weeds but also plays a role in mid-tillage. if there is no rain after 40 days, it can be soaked and irrigated again until mature harvest. This method requires only 15% of rice water consumption, which is convenient for mechanized operation, and is a new method of rice dry farming. If the hole is covered with water-retaining agent, the water consumption can be reduced to 8%, 10%.

Dry rice paper film mulching method: this method was first adopted by Niigata Farm in Japan. This method mainly uses old newspapers, waste paper or recycled paper film (such a low cost) as the mulching film. When rice is presented, it is only immersed once. Cover the paper film on the surface of the soil (the paper film will stick to the upper surface after soaking in water), so that it will not be blown away by the wind. It can also block the sun, prevent water evaporation, preserve water and reduce the growth of weeds. 2After 3 months, the paper film was gradually decomposed and integrated into the soil, leaving no harm. This method can reduce water consumption by 55% per cent and 70 per cent. This method can also be used for water conservation of other dry crops.

Rice high-yield semi-dry farming technology: Japan's Yuazheng Rice Technology Research Institute has explored a set of new techniques for high-yield and semi-dry rice cultivation, which is very different from traditional rice cultivation and water use. The general requirements are: dew mud in the early stage, infiltration irrigation, ventilation and root promotion, so that only about 30% of the conventional water consumption is needed, but also can restrain diseases and insect pests and reduce the cost of rice production.

1. When transplanting rice seedlings, it is appropriate to use "dew mud" in the field. If it is sunny after planting, you can infiltrate and irrigate, but you can not flood or flood irrigation. Just cover the mud with water. Check in the field 15 days after transplanting, step on it with your feet, and check again after soaking for three days if there are bubbles around the footprints, and continue to open the field if there are bubbles. This cross-combination method of "immersion-open field" has been used to promote the growth of rice root system.

2. After the formation of young panicle, intermittent irrigation is generally used to coordinate the relationship of nutrients needed for the growth of underground part (root) and aboveground part (stem and leaf) to promote the steady growth of rice in the middle stage. Before applying enamelling fertilizer, dry the field to make the soil moisture unsaturated, and then irrigate thin water until the soil water content is saturated after fertilization.

3. When heading, keep the soil water saturated in the field. In case of high temperature and dry weather, properly irrigate to keep the water layer at the depth of 6 2cm. After heading, the soil moisture was maintained in the early stage, moist irrigation was adopted in the later stage, roots were supported by gas, leaves were protected by roots, and the weight of leaves was increased by leaves. The soil gradually changed from moist to dry more than ten days before harvest to prevent sudden dehydration or premature dehydration.