Method for irrigating winter wheat according to root distribution

Abstract

The invention discloses a method for irrigating winter wheat according to root distribution. According to the method, a stereoscopic irrigating system is established in a wheat field and used for irrigating the winter wheat according to the growing time and the root depth of the winter wheat and the relative humidity of the soil at the root depth in a layering mode; layering irrigation includes surface-layer irrigation, intermediate-layer irrigation and deep-layer irrigation. Layering irrigation is conducted according to the growing time and the root depth of the winter wheat and the relative humidity of the soil at the root depth, the requirement of crops for water during the growing period can be met, non-available water and harmful water are not likely to be produced, and the utilization rate of the water is increased.

Description

technical field [0001] The invention relates to crop irrigation technology, especially winter wheat irrigation technology. Background technique [0002] North China is the main planting area of ​​winter wheat. It has been affected by the drought for a long time, which has largely restricted the high and stable yield of wheat grain. The whole growth period of winter wheat is about 230 days from sowing to harvesting, and the total water consumption is 600-800mm. The effective precipitation during the whole growth period is less than 300mm, so in order to maintain the yield of winter wheat in a normal year, it is necessary to irrigate 400-500mm of water. [0003] The water absorption of winter wheat depends on the root system, and the root depth of the wheat root system is as follows: after sowing, the root is 1 cm deep every day before overwintering, and the wintering period is basically 0.348 cm long every day. After turning green, it is basically 1.5 cm deep every day, reach...

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Problems solved by technology

In the initial stage of crop growth, the distribution of roots in the soil is relatively shallow. Although flood irrigation can solve the drought to a certain extent, at the same time, a large amount of water flows from top to bottom in the soil profile, causing fertilizer to be washed into the deep soil and crops The root system cannot be used; in the la...

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