Dry and dry rice is an important cultivation technique for drought resistance, water saving, labor saving, cost-saving, and efficiency increase. Its main technical points are: Land selection and site preparation In the early stage of dry rice seedlings, seedlings emerged from natural soil moisture, and the quality of seedlings was closely related to soil quality, soil fertility and land preparation quality. Therefore, we should choose land plots with low topography, fertile land, and certain irrigation conditions; the groundwater level is high, and both spring and summer and autumn are in wet cold soaking conditions or heavily saline-alkali lands. Timely sowing Sowing too early, the temperature is low, rice seeds are not easy to germinate, low seedling rate; late sowing temperature is high, soil water is dispersed more, it is not easy to complete seedlings, and because the growth period is shortened, affecting yield. Therefore, the suitable sowing date should be determined according to the soil moisture content and the growth period of the species. Liaoning is generally suitable from mid-April to the end of April. Seeds must be carefully selected and soaked. In order to avoid the harmfulness of underground pests, seed dressing should be carried out. The sowing amount should be appropriately increased, and 10 to 12.5 kg per mu should be appropriate. Under normal circumstances, drilling can be carried out. The soil is better to be planted on the plots where the barren grass is relatively heavy in the first year. The lyrical plots should be broadcast 2 to 3 centimeters deep, and the lyrical broadcast depth should be 4 to 5 centimeters. Strengthen water and fertilizer management In order to promote the development of seedling roots and enhance drought resistance, combined with about 3,000 kg of Mushi fertilizer, about 15 to 20 kg of seed fertilizer and about 35 kg of superphosphate are planted. According to the condition of the seedlings, it is appropriate to apply fertilizer and panicle fertilizer. The watering of rice seedlings began at 4 to 5 leaves, but no water layer was established. The water source is convenient, and it should be poured once every 3 to 5 days to ensure that the front water does not see the rear water and the wetness is not seen; in case of insufficient water source, the key water should be poured well 5 times, ie the water for branching, the jointing water, and the spike water , heading water, grouting water. The principle of watering is: "The first water is early, the second water is full, and the first three waters are important." Imported Bio-based Plastic Resin Chemical plastic products bring people all kinds of convenience, but also bring unimaginable trouble. As some waste plastics will not degrade under natural conditions, the combustion will release harmful gases, causing difficult pollution to the ecological environment. So scientists around the world are starting to develop self-destructing, or autolytic, plastics that can break down on their own to solve the problem. Some call it "green plastic". Companies in many countries have introduced their own biodegradable plastics. Biologists at the University of Mitzgan in the United States first proposed the idea of "growing" degradable plastics. Using potatoes and corn as raw materials, they inserted the plastic's genetic material so that it could be artificially grown without harmful ingredients. Imperial Chemical Forests USES bacteria to make sugars and organic acids into biodegradable plastics. The method is similar to the fermentation process used to produce ethanol, except that the bacteria, alkaloids, turn the feed into a plastic called PHBV. Bacteria accumulate the plastic as a store of energy, just as humans and animals store fat. When the bacteria have accumulated as much as 80% of their body weight in PHBV, they break down the cells with steam to collect the plastic. PHBV has properties similar to polypropylene, a material that is stable even in humid environments after being discarded, but which degrades into carbon dioxide and water in the presence of microorganisms. Imported Bio-Based Plastic Resin,Pla For Cup Lids,Pla Heat Performance,Easy Printability Pla Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com