Method for improving alkali resistance of rice

An alkali-resistant, rice-based technology, used in agriculture

An alkali-resistant, rice-based technology, used in agriculture

CN113016524APending Publication Date: 2021-06-25NORTHEAST AGRICULTURAL UNIVERSITY
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  • Method for improving alkali resistance of rice
  • Method for improving alkali resistance of rice
  • Method for improving alkali resistance of rice

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Experimental program
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Embodiment 1

[0035] Six varieties of rice varieties Changbai 10, Longdao 5, Songjing 16, Jihong 6, Longjing 18 and Dongnong 425 were selected as experimental materials, which were preserved by the Rice Breeding Office of the College of Agriculture, Northeast Agricultural University.

[0036] Select rice seeds with plump grains and soak them in ethanol with a volume fraction of 75% for 10 seconds, then sterilize them in a sodium hypochlorite solution with a concentration of 2% by mass for 5 minutes, rinse them with tap water for several times, and then soak them in tap water at room temperature for 36~ 48h until the seeds germinate. Sow the germinated rice seeds in the seedling tray. The specifications of the seedling tray are: 100cm long, 50cm wide, and 10cm high, with a total of 32 holes. The specifications of each hole are: 10cm long, 10cm wide, and 10cm high. cm. When the seedlings grew to three leaves and one heart, the stress treatment was started, and 6 treatments were set up, and e...

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Abstract

The invention discloses a method for improving alkali resistance of rice. The method comprises the following steps that a trehalose solution is applied to rice seedlings, the concentration of the trehalose solution ranges from 5 mmol / L to 20 mmol / L, and the optimal concentration is 10 mmol / L. The application mode is foliar spraying. The variety of the rice can be an alkali-sensitive variety (such as Dongnong 425), a moderate alkali-resistant variety (such as Songjing No.16 and Jihong No.6) and a strong alkali-resistant variety (such as Changbai No.10 and Longdao No.5), wherein an alkali-resistant effect of the alkali-sensitive variety is improved most obviously. The content of malonaldehyde, proline and soluble protein in rice seedlings can be reduced to different degrees after the trehalose with different concentrations is externally applied; and the content of superoxide dismutase and peroxidase is increased, such that the alkali resistance of the rice seedlings is improved.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a method for improving rice alkali tolerance. Background technique [0002] Soil salinization has become one of the important environmental problems. According to statistics, about 20% of the land in the world is saline-alkali land. China is one of the countries with a relatively large area of โ€‹โ€‹saline-alkali land. Among the 36 million hm2 of saline-alkali land, the cultivated land area accounts for 6.6 million hm2, which is about 7% of the total cultivated land area. The accumulation of alkali in the soil has great harm to the growth of plants. Excessive accumulation of alkali will destroy the availability of soil nutrients, which is not conducive to the healthy development of soil and the growth and development of crops. Rice is the main food crop in the world, and it is moderately sensitive to alkali stress, especially at the seedling stage. When the alkali ...

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Application Information

Patent Timeline
25 Jun 2021
Publication
CN113016524A
IPC
A01G22/22; A01G7/06
CPC
A01G22/22; A01G7/06
Inventors
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