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Method for fast improving newly-reclaimed saline wasteland

A saline-alkali and wasteland technology, which is applied in the field of rapid improvement of newly reclaimed saline-alkali wasteland, can solve the problems of poor water and fertilizer retention capacity and high salt content, and achieve the effect of rapid desalination and high-efficiency utilization

Inactive Publication Date: 2015-11-11
INST OF SOIL FERTILIZER & WATER SAVING AGRI GANSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After water diversion irrigation, the land has been leveled to form a multi-level gradient plateau, which can produce some yields, but still faces problems such as high salt content and poor water and fertilizer retention capabilities. It is urgent to achieve high and stable yields through rapid desalination transformation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In August and September after the end of the summer harvest in the first year, land leveling should be carried out, and the mellow soil of the plow layer should be kept as much as possible. The vertical (irrigation direction) slope is less than 1 / 500, and the horizontal level is horizontal. After leveling the land, irrigate and wash the salt once, and the irrigation volume is 2100m 3 / hm 2 , wash the salt once again during winter irrigation, and the irrigation volume is 3000m 3 / hm 2 , Pay attention to raking to preserve moisture after each irrigation. After the ground freezes in winter, spread 8 to 10 cm of fine sand. In the second to fourth years, the crop rotation mode of oil sunflower (covered with film)→corn (used with old film)→wheat is adopted. The results show that compared with the traditional method, the rapid improvement and utilization method can increase the yield of oil sunflower by 12.8%, the yield of corn by 10.4%, and the yield of wheat by 8.7%, and...

Embodiment 2

[0022] Measures such as land leveling in the 1st year, sand spreading and caustic pressure, irrigation and salt washing are the same as in Example 1. In the 2nd to 5th years, the crop rotation mode of succulents + arrow tongue peas (mixed sowing, overturned and returned to the field at full flowering stage)→corn (film mulching)→oil sunflower (old film utilization)→wheat is adopted. The results show that the amount of fresh grass mixed with leguminous green manure reaches 14372kg / hm 2 , the content of soil organic matter increased by 8.63% after being turned over and returned to the field, and the yields of planting corn, oil sunflower and wheat reached 11295kg / hm respectively 2 、4927kg / hm 2 and 6063kg / hm 2 , compared with the traditional improvement method, the yield increased by 9.64%, 13.15% and 9.27%, respectively, and the salt content of the 40cm soil layer decreased by 41.8% at the end of the crop rotation cycle, and the salt content of the 100cm soil layer decreased by...

Embodiment 3

[0024] Measures such as land levelling, sand spreading and alkali suppression, irrigation and salt washing in the first year are the same as in Example 1, and alfalfa is planted in the second year, and the beds are kept all year round. The results show that after three years of planting, two stubbles can be harvested each year, and the fresh grass amount can reach 63,000 kg / hm 2 , compared with the traditional improvement method, the salt content of the 40cm soil layer decreased by 48.5%, and the salt content of the 100cm soil layer decreased by 31.2%.

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Abstract

The invention discloses a method for fast improving newly-reclaimed saline wasteland. The method is achieved through the steps of land formation, irrigation salt leaching, alkali pressing by laying sand, forward crop planting and crop rotation planting. The method has the beneficial effects that according to the method for fast improving the newly-reclaimed saline wasteland, the yield of oil sunflowers, beet and other saline-alkaline tolerant forward crops can be improved by above 20%, and the stable yield of wheat after three years is 6,000 kg / hm<2>; meanwhile, desalination can be fast achieved through land formation, alkali pressing by laying the sand and irrigation salt leaching; efficient utilization can be achieved through forward crop planting and reasonable crop rotation, and the newly-reclaimed saline wasteland is improved when utilized.

Description

technical field [0001] The invention relates to the technical field of land improvement methods, in particular to a rapid improvement method for reclaiming saline-alkali wasteland. Background technique [0002] Newly reclaimed land refers to the sloping plains, ancient river terraces, rolling hills and low soil mountains formed during the neotectonic movement and continuous erosion before water diversion for irrigation. A large amount of salt remains in the soil. After water diversion irrigation, the land has been leveled to form a multi-level gradient plateau, which can produce some yields, but still faces problems such as high salt content and poor water and fertilizer retention capabilities. It is urgent to achieve high and stable yields through rapid desalination transformation. Contents of the invention [0003] The object of the present invention is to provide a rapid improvement method for reclaiming saline-alkali wasteland aiming at the defects in the above-mentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02
Inventor 王成宝杨思存姜万礼霍琳
Owner INST OF SOIL FERTILIZER & WATER SAVING AGRI GANSU ACAD OF AGRI SCI
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