How to irrigate rice? Latest technical methods tutorial

Rice is the world's main food crop, and most of the population relies on rice as a staple food. It is widely cultivated around the world and has a cultivation history of several thousand years. It mainly grows in water, and irrigation is very important for rice, directly affecting rice growth conditions and yield levels. Today let us learn together about rice irrigation techniques and understand the effects of irrigation on rice growth, so that later we can regulate water quantity to control rice growth.

I. Water requirement characteristics

Rice mostly grows well only in water. Generally, nutrients absorbed by the roots need water for transport, and the nutrients from leaf photosynthesis also need water for transfer. The large amount of water transpired from the leaves at ordinary times needs to be replenished to keep the stems and leaves upright. Fertilizer needs to dissolve in water to be absorbed better; and the depth of the water can also regulate the environmental temperature in the field. Water in the field has a certain role in preventing insects and washing away toxic substances.

II. Water requirement stages

1. Germination requirements

Rice has the characteristic of sprouting in water and growing roots in warmth. It needs to be kept in a moist shallow water layer of about 70% to favor seed germination. The shallow water layer can stably maintain a suitable temperature.

2. One-cun water for green-up

Transplanting damages the roots while transpiration does not decrease, so balance should be maintained. It should be planted in shallow water of about 3 cm to preserve warmth and moisture, restore growth, and promote rooting and green-up.

3. Shallow water for tillering

During the tillering stage, a shallow water layer can be maintained for a while, and then no water can be left, so that the roots receive sunlight, promoting low-position tillering and root growth.

4. Controlling tillering by sun-drying the field

At the late tillering stage, the water should be removed and the field sun-dried to control ineffective tillering, increase the heading rate, enhance the lodging resistance of roots and stems, strengthen the culms, and improve plant resistance.

5. Shallow water for booting

Water demand is greatest during jointing and booting. About half a month before heading, irrigate 3 cm, and about 3 days after the water has infiltrated, irrigate 3 cm again to promote heading.

6. Moist grain filling

During the grain-filling stage, water should not be irrigated continuously for a long time; generally alternate wetting and drying are used. That is, irrigate 2 cm, then irrigate again 3 days after it dries, repeating this until after maturity. This can increase the seed-setting rate and the 1000-grain weight, turn yellow and mature, and then irrigation is stopped to facilitate harvesting.

Water runs through the entire growth period of rice. Maintaining different irrigation amounts at different stages in order to promote the water requirements of rice at each stage, coordinate growth, and balance the needs of vegetative and reproductive growth. Achieve the goal of good growth and high yield.