A method to quickly break the dormancy of barnyardgrass seeds and increase the germination rate

Abstract

The invention discloses a method for quickly breaking the dormancy of barnyardgrass seeds and improving the germination rate, comprising the following steps: putting the mature barnyardgrass ears into a nylon mesh bag and tapping lightly, so that the mature seeds fall into the mesh bag naturally; The obtained barnyardgrass seeds are placed in the sun to dry, and then stored in an environment of ‑20°C to 0°C to obtain barnyardgrass seeds that have broken dormancy, soaked in concentrated sulfuric acid, and then rinsed with water to obtain thinning Barnyardgrass seeds with husks were placed in an artificial climate chamber for germination. The method of the invention is simple and easy to operate, can quickly break seed dormancy and realize seed germination in a short period of time, shorten the dormancy time of barnyard grass seeds, the germination process only needs 3-5 days, saves a lot of time, and has a high germination rate. It can also make the seeds of barnyardgrass germinate neatly and the germination time is consistent, which is conducive to improving the efficiency and accuracy of research, and is suitable for indoor bioassays of the vicious weed barnyardgrass in my country's farmland, detection of herbicide resistance and other fields.

Description

technical field

[0001] The invention belongs to the technical field of plant protection, in particular to a method for rapidly breaking the dormancy of barnyardgrass seeds and increasing the germination rate. Background technique

[0002] Barnyardgrass (Echinochloa crusgalli (L.). Beaiv.) is one of the world's top ten malignant weeds, and it is also the most widely distributed weed in China's rice production areas and has the greatest impact on rice yield. In my country's rice fields, the damage area is as high as 9.4×10 5 hm 2 , accounting for 43.5% of the total area of ​​rice fields in my country, seriously affecting the yield and quality of rice. Especially with the rapid development of light cultivation methods, the area of ​​direct-seeding rice has increased rapidly, and the occurrence base of barnyardgrass in direct-seeding rice is more, as high as 1200 plants / m 2 , if no control is carried out, rice grains will fail due to the harm of barnyardgrass. Chemical weedi...