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Method for mixed planting of cotton, sorghum and green manure crop to improve saline-alkaline soil

A technology for green manure crops and saline-alkali land, which is applied in the fields of land preparation methods, botanical equipment and methods, cotton cultivation, etc. Effect of dosage and frequency of application

Active Publication Date: 2018-01-12
SHANDONG COTTON RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cotton and sorghum have strong salt tolerance and are suitable for planting in saline-alkali land. However, at present, cotton or sorghum is mostly used as single cropping or continuous cropping in saline-alkali land in the Yellow River Delta.
In terms of production, there is also the practice of intercropping cotton and sorghum, but common sorghum varieties are mostly used; there are also interplanting cotton and green manure crops, but no mature and fixed planting pattern has been formed.

Method used

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  • Method for mixed planting of cotton, sorghum and green manure crop to improve saline-alkaline soil
  • Method for mixed planting of cotton, sorghum and green manure crop to improve saline-alkaline soil
  • Method for mixed planting of cotton, sorghum and green manure crop to improve saline-alkaline soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This experiment was carried out in Lijin County, Dongying City, with a soil salt content of 0.4%. Cotton variety K836, dwarf sorghum variety Suiza 7 and Lvfei Xutiao 3 were used as test materials. In 2014, 10 batches were deeply plowed and sun-dried (plowing depth was 30cm). In the last ten days of March 2015, the saline-alkali land that has been deeply plowed and sun-dried was used for land preparation, and 2t of organic fertilizer and NPK compound fertilizer (18% N, 12% P 2 o 5 , 18%K 2 (2) 40kg as base manure. Irrigate the saline-alkali land after the above-mentioned site preparation with water and salt (the amount of irrigation per mu is 70m 3 ), to obtain the saline-alkali land after salt pressing. Sorghum and cotton were sown on April 26. Cotton was planted with a row spacing of 76 cm, and the planting density was 6500 plants / mu. Sorghum was planted with a row spacing of 38 cm, and the planting density was 10,000 plants / mu. 4 rows of cotton were intercropp...

Embodiment 2

[0063] This experiment was carried out in Kenli County, Dongying City, with a soil salt content of 0.7%. Cotton variety K836, dwarf sorghum varieties Suiza No. 7 and Zivet minzi No. 1 were used as test materials. In 2014, 10 batches were deeply plowed and sun-dried (plowing depth was 35cm). In the last ten days of March 2015, the saline-alkali land that has been deeply plowed and sun-dried was used for land preparation, and 2t of organic fertilizer and NPK compound fertilizer (18% N, 12% P 2 o 5 , 18%K 2 (2) 40kg as base manure. Irrigate the saline-alkali land after the above-mentioned site preparation with water and pressure salt (the amount of irrigation per mu is 150m 3 ), to obtain the saline-alkali land after salt pressing. Sow sorghum and cotton on April 18. Cotton was planted with a row spacing of 76 cm, and the planting density was 6000 plants / mu. Sorghum was planted with a row spacing of 38 cm, and the planting density was 11,000 plants / mu. 4 rows of cotton we...

Embodiment 3

[0066] Pure cotton, pure sorghum and traditional cotton sorghum intercropping (4 rows of cotton intercropping and 1 row of sorghum), other conditions are exactly the same as in Example 1, respectively as control groups 1 to 3, the cotton and sorghum yields of each group are counted, and After harvesting each year, soil samples were taken to measure soil salinity and nutrient content, and the number of plant protections for cotton was recorded. The specific data are shown in Table 1.

[0067] Table 1 Cotton and sorghum yields and soil conditions of different treatments

[0068]

[0069]

[0070]As can be seen from Table 1, the equal-width intercropping rotation pattern provided by the present invention is compared with cotton and sorghum monoculture, and the output of cotton and sorghum in 2015 is equivalent. However, in 2016, the yields of model cotton and sorghum provided by the present invention were significantly higher than those of monoculture cotton and sorghum, wi...

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Abstract

The invention provides a method for mixed planting of cotton, sorghum and green manure crop to improve saline-alkaline soil and belongs to the technical field of crop mixed planting. The method includes following steps: performing deep ploughing and unturned soil sunning from October to November of the first year to obtain saline-alkaline soil after unturned soil sunning; performing watering and salt pressing on the saline-alkaline soil before seeding cotton and sorghum to obtain saline-alkaline soil after salt pressing in the second year; in the middle to late of April of the second year, seeding cotton and sorghum in the saline-alkaline soil after salt pressing to form a cotton seeding belt and a sorghum seedling belt; intercropping cotton and sorghum by uniform amplitude: intercropping7 rows of sorghum with 4 rows of cotton; in the middle to late of August of the second year, harvesting sorghum, and broadcasting green manure crop seeds at sorghum stubbles; on October of the secondyear, defoliating the cotton for accelerating ripening, and harvesting the cotton; from late March to early April of the third year, directly turning and burying the green manure crop, and performingrotary tillage to prepare soil. After adopting the method for mixed planting, salt content of land is remarkably lowered, effect on improving the saline-alkaline soil is obvious, and yield of the cotton and the sorghum can be increased effectively.

Description

technical field [0001] The invention belongs to the technical field of land improvement, and in particular relates to a method for improving saline-alkali land by mixing cotton, sorghum and green manure crops. Background technique [0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country is the largest 99.13 million hectares. The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive. [0003] Cotton and sorghum have strong salt tolerance and are suitable for planting in saline-alkali land. However, at present, cotton or sorghum is mostly used as single cropping...

Claims

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Application Information

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IPC IPC(8): A01B79/02A01G22/20A01G22/50A01G13/00
Inventor 代建龙董合忠张晓洁张冬梅李维江
Owner SHANDONG COTTON RES CENT
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