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Appraisal method of drought resistance in seedling stage of crops using bottom infiltration and rewatering

An identification method and a technology of drought resistance, which is applied in the field of identification of crop seedling drought resistance, can solve the problems of being out of production, easy compaction of the soil surface, and large differences, so as to improve work efficiency, solve irrigation difficulties, and save time.

Active Publication Date: 2018-07-24
甘肃省农业科学院作物研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing crop seedling stage repeated drought rehydration technology is soil surface irrigation (rewatering). Practice has proved that no matter whether sprinkler irrigation, drip irrigation, watering or other methods are used, there will be two serious effects when soil surface irrigation (rewatering) Factors for the accuracy of drought resistance identification results: First, the soil surface is very easy to harden, which affects the growth and even survival of seedlings; second, the soil moisture content in different parts of the seeding box, seeding basket or drought-resistant pool is different due to the inability to overcome the problem of the complete level of the soil surface , affecting the accuracy of identification results
In addition, in order to prevent the impact caused by hardening, the weighing method often mixes a certain amount of organic matter and vermiculite into the potting soil. This kind of cultivation environment is quite different from the field environment, which is far from the actual production

Method used

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  • Appraisal method of drought resistance in seedling stage of crops using bottom infiltration and rewatering
  • Appraisal method of drought resistance in seedling stage of crops using bottom infiltration and rewatering
  • Appraisal method of drought resistance in seedling stage of crops using bottom infiltration and rewatering

Examples

Experimental program
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Effect test

Embodiment 1

[0028] From June 24 to August 16, 2013, the Miscellaneous Grains Research Group carried out the drought resistance appraisal of 56 broomcorn broomcorn varieties at the seedling stage at the Dunhuang Experimental Station of the Gansu Academy of Agricultural Sciences when the annual rainfall was less than 40 mm and the daily evaporation was the largest. The experiment was designed as a paired experiment, with a drought treatment group and a normal control group (one group and one water tank), with three repetitions within the group and random seeding within the repetitions. The experiment was successful.

[0029] The specific implementation process is as follows: Figure 1-3 Shown:

[0030] Material preparation: 135 pieces of ordinary bricks (length×width×height=200mm×100mm×35mm), 60m anti-aging shed film 2 (length × width = 10m × 6m), 114 bottom mesh (water seepage holes) seeding boxes (length × width × height = 45cm × 30cm × 25cm), 114 sheets of printing paper (length × width...

Embodiment 2

[0038] From June 27 to August 22, 2015, the Miscellaneous Grains Research Group carried out the drought resistance identification of 500 millet-associated populations at the seedling stage at the Dunhuang Experimental Station of the Gansu Academy of Agricultural Sciences. One water tank was made for each repetition), and the drought stress treatment was repeated twice, and it was successful.

[0039] The specific implementation process is basically the same as in Example 1, in which the test materials and the area of ​​the water tank are enlarged correspondingly according to the scale. The sowing is completed within one day, and two repetitions are completed in the morning and afternoon respectively. Bottom infiltration and rewatering technology was also used for rehydration after drought stress. On August 3, 2015, when the soil moisture content was 2.42%, the first rehydration was performed, and on August 18, when the soil moisture content was 2.14%, the second rehydration was c...

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Abstract

The invention discloses a crop seedling stage drought resistance identification method employing bottom upward percolation re-watering technology. The method comprises following steps: (1) preparing materials; (2) manufacturing water tanks; (3) adding soil into boxes; (4) combing the sowing boxes and the water tanks; (5) sowing seeds; (6) re-watering the seeds; and (7) draining the water. The beneficial effects of the method are that the crop seedling stage drought resistance identification method employs the bottom upward percolation re-watering technology, so that seedling stage drought resistance identification on crops having different germplasms can be performed on a large scale, and the identification is easy; the crops can be simultaneously re-watered in batch through the bottom upward percolation re-watering technology, the influence caused by different watering time in the same repeating process is avoided, and the working efficiency is improved; a problem that heat shock effects on the crops may be easily formed through a soil surface watering manner under a high-temperature and high light intensity condition is overcome; a soil hardening phenomenon is avoided; the physiological metabolism and growth of roots are not influenced; the water content between the sowing boxes and in the sowing boxes are the same; and the accuracy of a test is greatly improved.

Description

technical field [0001] The invention relates to the field of crop planting, in particular to a method for identifying the drought resistance of crop seedlings by adopting bottom seepage and rewatering. Background technique [0002] The shortage of water resources and frequent occurrence of drought have become important abiotic factors restricting crop production. It is an important way to solve this problem by using the genetic potential of drought resistance and water saving of crops to achieve water saving effect. Therefore, it is necessary to identify the drought resistance of crops and important. Drought resistance identification at seedling stage is an important stage of crop drought resistance identification. The time required for drought resistance identification at seedling stage is short, labor-saving and water-saving, and germplasm identification can be carried out in large quantities. The repeated drought method is a commonly used method for the identification of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G7/00
CPCA01G7/00
Inventor 刘天鹏杨天育王兴荣董孔军南宏宇何继红张彦军任瑞玉张磊
Owner 甘肃省农业科学院作物研究所