Irrigation and drainage method for improving soda alkali-saline paddy field in field steeping period

A technology for soda saline-alkali land and horizontal drainage, which is applied in the fields of land preparation methods, applications, agricultural machinery and implements, etc., can solve the problems of poor saline-alkali removal effect and low rice yield in paddy fields in soda-saline-alkali land, and achieve the effect of thorough saline-alkali discharge.

Active Publication Date: 2015-12-16
华清农业开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of poor saline-alkali removal effect and low rice yield in soda saline-alkali paddy fields in the prior art whe

Method used

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  • Irrigation and drainage method for improving soda alkali-saline paddy field in field steeping period
  • Irrigation and drainage method for improving soda alkali-saline paddy field in field steeping period
  • Irrigation and drainage method for improving soda alkali-saline paddy field in field steeping period

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specific Embodiment approach 1

[0036] Specific implementation mode one: the method for irrigation and drainage during soaking period of the improved soda saline-alkali paddy field described in this implementation mode is realized according to the following steps:

[0037] One, select the soda saline-alkali paddy field with pH of 9.77-10.65; the EC of the soda saline-alkali paddy field is 0.68-2.94mS / cm;

[0038] 2. To level the land, add 100% GR of desulfurized gypsum as a modifier according to the alkalinity of the soil; the amount of desulfurized gypsum added is calculated according to the following formula:

[0039] 100%GR=1.25×CEC×(ESP i –ESP f )×10 -2

[0040] In the above formula:

[0041] 100% GR is the amount of desulfurized gypsum added, the unit is mol c / kg, where, mol c The subscript c is the charge number, mol c Is the unit, equivalent to the equivalent concentration;

[0042] CEC is the soil cation exchange capacity, which is 200mmol c / kg; ESP i is the initial alkalinity of the soil...

specific Embodiment approach 2

[0052] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in the step 3, the water consumption for the first artificial irrigation soaking field is that the water surface reaches a height of 6-10 cm above the soil surface. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0053] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the water consumption for the first artificial irrigation soaking field in step three is that the water surface reaches the height of 8 cm above the soil surface. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses an irrigation and drainage method for improving a soda alkali-saline paddy field in a field steeping period, and relates to a method for improving a soda alkali-saline paddy field. The method aims at solving the problems that when a soda alkali-saline paddy field is improved in the prior art, the alkali-saline removing effect is poor, and the rice yield of the soda alkali-saline paddy field is low. The method comprises the steps that 1, the soda alkali-saline paddy field is selected; 2, the land is leveled, and desulphurization gypsum is added according to the soil alkalisation degree; 3, manual irrigation and field steeping are carried out for the first time; 4, water raking and slurry mixing are carried out for the first time, stabilization is carried out for 24 h, and level drainage is carried out for the first time; 5, after first-time level drainage is finished, manual irrigation and field steeping are carried out for the second time; 6, after second-time manual irrigation and field steeping, water raking and slurry mixing are carried out for the second time, stabilization is carried out for 24 h, level drainage is carried out for the second time, and then the irrigation and drainage for improving the soda alkali-saline paddy field in the field steeping period are completed. According to irrigation and drainage method for improving the soda alkali-saline paddy field in the field steeping period, the alkali-saline removing effect is thorough, the rice yield is improved by 36-63%, and the irrigation and drainage method is used for improving the soda alkali-saline paddy field.

Description

technical field [0001] The invention relates to a method for improving soda saline-alkali land. Background technique [0002] For the development of rice in saline-alkaline land, it is necessary to grasp the law of saline-alkali activity, and determine a reasonable irrigation technology under the conditions of supporting projects, which can ensure water supply for rice, leaching saline-alkali, and preventing secondary salinization. In the existing technology, when the irrigation system is formulated, only the water supply in each growth stage of rice is paid attention to, and a main process of irrigation, that is, water irrigation and drainage in the field soaking stage, is ignored. Water irrigation and drainage during the soaking period of saline-alkali soil is the main way to wash and discharge salt, which is of great significance to the improvement of saline-alkali land. The water irrigation and drainage in the soaking field period in the prior art is only a rough expres...

Claims

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Application Information

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IPC IPC(8): A01B79/00
Inventor 杨帆王志春安丰华马红媛王云鹤杨洪涛张久明
Owner 华清农业开发有限公司
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