Method for quickly breaking dormancy of barnyard grass seeds and improving germination rate

Abstract

The invention discloses a method for quickly breaking the dormancy of barnyard grass seeds and improving the germination rate, wherein the method includes the following steps: putting ripe barnyard grass spikes into nylon mesh bags and gently patting to make the ripe seeds naturally fall into the mesh bags, placing the obtained barnyard grass seeds in the sun, drying in the sun, and then preserving the barnyard grass seeds in the environment of -20 DEG C-0 DEG C, to obtain barnyard grass seeds that break dormancy; placing the barnyard grass seeds in concentrated sulfuric acid, soaking, and rinsing with clear water, to obtain barnyard grass seeds with thin glume shells; and placing the obtained barnyard grass seeds in an artificial climate chamber, and accelerating germination. The method is simple, has strong operability, can quickly break seed dormancy, realizes seed germination in a short period of time, shortens the dormancy time of the barnyard grass seeds, only needs 3-5 days forgermination process, saves a lot of time, has high germination rate, can also make the barnyard grass seeds germinated neatly, has consistent germination time, is conducive to improving the efficiencyand accuracy of researches, and is suitable for indoor bioassay of malignant weed barnyard grass of farmlands in China, herbicide resistance testing 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...

AI Technical Summary

Problems solved by technology

This is the most commonly used germination method at present. This method is simple and convenient, but there are also the following problems: 1. The seeds dormant for a long time, and generally need a winter to germinate in the coming year; 2. Barnyard grass germinates slowly, with low germination rate and weak germination potential ; 3. The germination is irregular and the germination time varies greatly, especially in the bioassay test of herbicides, which affects the results