A New Method to Evaluate the Survival Competitiveness of Transgenic Cotton in Wasteland in Extremely Arid Areas

Abstract

The invention discloses a new method for evaluating the survival and competitiveness of transgenic cotton wasteland in extremely arid regions, which includes the following steps: Step 1. When the temperature is suitable in spring, sow transgenic cotton and conventional cotton on the wasteland where weeds were dense in previous years, and let the transgenic cotton Cotton, regular cotton grows with weeds; uses natural grass. Step 2. Ensure water supply so that cotton and weeds can grow normally. Step 3, the soil adopts natural fertility, and artificial fertilization is not carried out. Only the natural fertility of the soil was used in the experimental field, and no additional fertilizer was applied. Step 4. Reduce the damage to weeds caused by survey activities. Step 5. Overcome the impact of cotton diseases and insect pests on the test, and prevent and control them in time so that they do not cause harm to cotton. The evaluation method of the present invention proves that under the condition of competition between wasteland and weeds, the growth of the transgenic drought-resistant cotton and its conventional recipient cotton are weak, and the seeds cannot be propagated successfully.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and relates to a new method for evaluating the survival and competitiveness of transgenic cotton wasteland in extremely arid regions. Background technique [0002] The environmental risk assessment of transgenic cotton is one of the important contents in the research and development of new transgenic cotton varieties. my country has formulated relevant standards to guide the evaluation of transgenic cotton's survival and competitiveness in barren land under natural rainfall conditions, and these technologies have also been applied in areas with abundant natural rainfall in China. However, the existing technology is difficult to apply in the extremely arid regions of my country, such as the southern and northern cotton regions of the Xinjiang Autonomous Region and the Hexi Corridor cotton region of Gansu Province, because the natural rainfall in these cotton regions is scarce in most years, ...

AI Technical Summary

Problems solved by technology

However, the existing technology is difficult to apply in the extremely arid regions of my country, such as the southern and northern cotton regions of the Xinjiang Autonomous Region and the Hexi Corridor cotton region of Gansu Province, because the natural rainfall in these cotton regions is scarce in most years, and the transgenic cotton seeds sown in barren land conditions are often Difficult to emerge, unable to grow normally, unable to carry out follow-up observation smoothly

However, this does not mean that there is no risk of genetically modified cotton in these extremely arid areas, because the natural rainfall in these extremely arid areas is not balanced in time and space. Although it is difficult to conduct wildland experiments according to the existing technology, the risk cannot be completely ruled out.

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