What are the direct-season rice soil sealants?

At present, the commonly used soil sealing treatment agents after direct seeding for rice seeding mainly include butachlor, pretilachlor, isoproturon, pendimethalin, and dysentery, and the main agents for grass weeds, bensulfuron-methyl Pyrisulfuron-methyl and the like mainly for broadleaf weeds and sedges. Herbicides registered for direct seeding of rice fields or rice fields must be used in production.

The direct application of soil sealing agent before seeding in the direct seeding of rice seedlings requires the establishment of a tightly closed soil layer with a thickness of 2-3 cm after application. Appropriate soil moisture is conducive to the establishment of the soil layer. When the soil is applied or applied, the soil is too dry. It is difficult to establish a good soil layer, which is not conducive to the exertion of the drug effect, which will cause a serious decline in the closed herbicidal effect. Relatively speaking, the herbicides commonly used in dry fields, such as pendimethalin (Shi Tianbu) and dysentery (Gengfenling), have relatively good application effects when the soil is dry.

Regardless of which soil-blocking treatment agent is applied, it is prone to phytotoxicity when the surface of the dough is accumulated for a long time after application, especially the drugs such as oxaloin and butachlor, which are more likely to cause phytotoxicity. It is relatively less prone to phytotoxicity after administration of a prednisolone (broom), butachlor (new Marshette) with a high-quality safener.