How to manage the water layer during rice filling?

After full heading of rice, it is in the high temperature season in midsummer, and it is also the early stage of rice filling. Intermittent irrigation is needed to ensure the water requirement of rice and the air permeability of soil. Intermittent irrigation is to irrigate shallow water once, and naturally drain until there is water in the footwell, and then irrigate shallow water, alternating dry and wet in the early stage and dry and wet in the later stage.

Adjusting fertilizer with water, adjusting gas with water, supporting roots with gas and protecting leaves with roots are beneficial to high yield. In order to achieve high yield and good quality, irrigation should be stopped more than 30 days after heading, and drainage is usually carried out at the end of wax ripening and the beginning of yellow ripening, which not only ensures the maturity of rice, but also creates convenient conditions for harvesting.

Rice enters the wax ripening stage, which can be wet or dry. That is to say, water is poured once every few days, and it slowly dries. After drying, you can dry it for another two days to let the roots breathe, and then water the next crop! However, there should be no serious dry cracking in rice fields, in case the soil dry cracking breaks the rice root system and leads to premature aging of rice! At this time, the paddy field should be kept dry, wet and wet. If there is high temperature and windy weather or autumn tiger weather, we must irrigate and protect the roots to prevent rice from being damaged by high temperature. Dry soil will damage the roots and cause premature aging!

The correlation is as follows

When rice enters the yellow maturity stage, if there is low temperature and windy weather with the lowest temperature below 4℃ at night, it is also necessary to irrigate and protect roots to prevent rice from premature aging due to cold damage! When the rice enters the late stage of yellow maturity, the rice basically turns into mature yellow, the rice grains become hard and not easy to break, and most of the branchlets below the rice grains also turn yellow.

You can stop the water supply. After the water is stopped, it is mainly dry and dry, but the soil is kept to have a certain humidity. All the branchlets under the rice grain have not completely turned yellow, and the glumes in the rice grain have not turned into mature colors. Rice fields should not be cracked, to prevent premature aging of rice, and to keep the fields moist to some extent! Otherwise, it will also cause the 1000-grain weight of rice to drop and reduce production!

There is a general principle to be grasped when water is stopped in paddy field: after water is stopped in paddy field, all the branchlets under rice spikelets do not turn yellow, and the spikelets in rice grains do not completely turn into mature colors, so the paddy field cannot suffer from severe drought and cracking, otherwise it will lead to premature aging and yield reduction! Under the premise of ensuring that the harvest is not affected, the sooner the water is stopped, the better. Or the longer the field stays wet in the middle and late stage of rice, the higher the rice yield.