1. Watermelon cultivation technology Watermelon seeds are sterilized, soaked and sprouted after sowing. The substrate plug seedlings are prepared for transplanting when the seedlings are 30 to 35 days old and three leaves are one heart, and the seedlings are refined 1 week before transplanting. In the early stage after planting, the greenhouse is kept warm and moisturized, and the seedlings basically survive and start to grow and ventilate to reduce humidity. As the temperature rises, the amount of ventilation is gradually increased, and the side membrane is completely shaken off during a sunny day in May. Fertilizers are based on "basic fertilizer, supplemented by top dressing." About 10 days after planting, the seedlings are extracted with 0.3% urea solution in combination with watering. Watering should be properly controlled during the flowering and fruit setting period, and the water should be kept adequate during the fruit expansion period. Each time, apply 10 kg of potassium sulfate compound fertilizer per mu combined with irrigation, once every 10 days; stop watering at the later stage of fruit expansion. In the early spring, the first watermelon in the facility is usually harvested about 30 days after pollination, and the second to third crops can be harvested about 20 days after pollination.
2. Zizania cultivation technique Digging seedlings from the reserved field in late April to grow seedlings, divided into small piers with 3 to 4 tiller seedlings, and planted with each branch. Transplanted in late July, planting according to wide and narrow rows, wide row spacing 60 ~ 70 cm, narrow row spacing 40 ~ 50 cm, plant spacing 25 cm, planting about 4000 holes per acre, cutting leaves for planting, leaving seedling height 45 ~ 50 cm. About 20 days after planting, when planting live trees, stand up and apply 8 kg of urea per mu; topdressing fertilizer is applied once a month after planting, and 10 to 15 kg of urea per mu is applied; 1 is applied at the end of September Fertilizer for the second pregnancy, apply 15 kg of urea per mu; winter fertilizer should be supplemented during the prosperous harvest period, usually 10 to 15 kg of imported compound fertilizer per mu. The autumn wild rice is harvested from September to October. In December, the mud was cut off part of the rusty leaves on the ground, the garden was cleaned, and the field was filled with shallow water, and the greenhouse was covered in time. In the early and mid-February of the following year, when the seedling height was 20-30 cm, the seedlings were combined with Yuntian to retain 18-20 strong seedlings per pier. The temperature of the greenhouse is maintained at an average daily temperature of 20°C to 25°C. When the average daily temperature before and after the Qingming period exceeds 15°C, the greenhouse film is removed. Xia Jiao was harvested in early April.
3. The cultivation technology of C. edodes follows the conventional rice seedling cultivation field to make the C. edodes seedling cultivation field. The plant row spacing is 10 cm × 10 cm, to ensure stable planting and slightly exposed bud tips. Pull up the seedlings during planting, remove the old yellow leaves, maintain a 2 to 3 cm water layer in the field, and put the seedling roots into the soil 10 cm. Planting rows are generally 70 cm x 45 cm apart. Within 1 month after planting, keep 3-5 cm of shallow water. Later, as the plants grow, the water level is gradually deepened to 10-15 cm. Fertilizers were applied once each time after the live tree, mid-growth, and 60-80 days after planting. At the beginning of July, combined with cultivating and weeding, fertilizing, stripping the outer and old leaves, leaving 3 to 4 new leaves per plant. In mid-October, the stems and leaves are yellow, and the bulbs are fully mature and harvested.
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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
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