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Saline-alkali paddy salt-leaching and salt-removing method

A technology for paddy field and salt washing, which is applied to the field of salt washing and salt discharge in saline-alkali paddy fields, can solve the problems of long preparation time for field cultivation, large fresh water consumption, and many times of salt washing, and achieves reduction of fresh water consumption, fast salt washing, Good effect of washing salt

Active Publication Date: 2015-11-18
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above measures have disadvantages such as many times of salt washing, large fresh water consumption, etc., and the preparation time for field cultivation is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] During the process of finishing the saline-alkali land into rice fields, buried salt drainage pipes are embedded every 5m at the bottom of the saline-alkali land cultivation layer for salt drainage. Valves are arranged on the salt drainage pipes, and the outlet of the salt drainage pipes communicates with the drainage ditch. Groundwater level measuring pipes are installed every 10m in the field ridges to monitor the groundwater level.

[0019] Deep plowing was carried out 10 days before transplanting rice. After deep plowing, pour fresh water into it to make the fresh water 2cm higher than the field surface, and then carry out rotary tillage to increase the contact surface between soil and fresh water, so that fresh water can fully contact with soil particles, increase the speed of salt washing and reduce the consumption of fresh water. Drain the fresh water after soaking the field for 1 day, and continue to pour in fresh water to make the fresh water 2cm higher than th...

Embodiment 2

[0023] During the process of finishing the saline-alkali land into rice fields, buried salt drainage pipes are embedded every 5m at the bottom of the saline-alkali land cultivation layer for salt drainage. Valves are arranged on the salt drainage pipes, and the outlet of the salt drainage pipes communicates with the drainage ditch. Groundwater level measuring pipes are installed every 10m in the field ridges to monitor the groundwater level.

[0024] Deep plowing was carried out 7 days before transplanting rice. After deep plowing, pour fresh water into it to make the fresh water 2cm higher than the field surface, and then carry out rotary tillage to increase the contact surface between soil and fresh water, so that fresh water can fully contact with soil particles, increase the speed of salt washing and reduce the consumption of fresh water. Drain the fresh water after soaking the field for 1 day, and continue to pour in fresh water to make the fresh water 2cm higher than the...

Embodiment 3

[0028] During the process of finishing the saline-alkali land into rice fields, buried salt drainage pipes are embedded every 5m at the bottom of the saline-alkali land cultivation layer for salt drainage. Valves are arranged on the salt drainage pipes, and the outlet of the salt drainage pipes communicates with the drainage ditch. Groundwater level measuring pipes are installed every 10m in the field ridges to monitor the groundwater level.

[0029] Deep plowing was carried out 5 days before transplanting rice. After deep plowing, pour fresh water into it to make the fresh water 4cm higher than the field surface, and then carry out rotary tillage to increase the contact surface between soil and fresh water, so that fresh water can fully contact with soil particles, increase the speed of salt washing and reduce the amount of fresh water. After 2 days of soaking in the field, drain fresh water, continue to pour in fresh water to make the fresh water 4cm higher than the field su...

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Abstract

The invention provides a saline-alkali paddy salt-leaching and salt-removing method. The method includes the steps that deep tillage is carried out 5-10 days before transplanting, then, fresh water is poured in, till the fresh water is 2-4 cm higher than the field surface, rotary tillage is conducted, and the fresh water is drained 1-2 days after field steeping; fresh water continues to be poured in till the fresh water is 2-4 cm higher than the field surface, rotary tillage and harrow smoothing are carried out, and the fresh water is drained after field steeping is carried out till surface water is clarified; fresh water is poured in again to guarantee a water layer which is 1-2 cm high on the field surface, and rice seedlings are transplanted; after the rice seedlings turn green, shallow ditches are dug every 3-4 cm; a deep ditch is dug in the inner side of a field ridge; a drainage ditch is dug in the outer side of the field ridge, and the bottom of the drainage ditch is 15-20 cm lower than a farming layer; a salt-removing hidden pipe is pre-buried at the bottom of the farming layer, an outlet of the salt-removing hidden pipe is communicated with the drainage ditch, and the salt-removing hidden pipe is provided with a valve; an underground water level measuring device is arranged in the field ridge, fresh water is poured in for salt leaching when the underground water level decreases, and the valve on the salt-removing hidden pipe is opened for removing salt when the underground water level raises.

Description

technical field [0001] The invention belongs to the technical field of rice planting, and in particular relates to a method for washing and discharging salt in a saline-alkali rice field. Background technique [0002] When rice is planted in saline-alkali land, the main salt damage is the low rate of rice seedling formation, a substantial reduction in tillering, small growth, and difficulty in heading. The yield of rice in saline-alkali land is not high. Therefore, it is necessary to improve the saline-alkaline land. [0003] At present, the improvement of saline-alkali land in my country mainly takes measures such as pressing salt and washing salt. Soaking the field to wash salt before transplanting rice seedlings, and flushing and draining the salt in the soil through flood irrigation and drainage during the growth period can quickly improve the soil. The effect of saline soil. Such as Zhao Guochen et al. invented the plowing and land preparation method (CN201110224232.1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00
CPCY02A40/10
Inventor 向镜朱德峰
Owner CHINA NAT RICE RES INST
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