The mahogany tree has a tall tree shape, a dignified appearance and fancy flowers. It is one of the most promising green plants and flowers in town in recent years. Due to the combined effects of heredity and special ecological environment, the embryo rate of its winged seeds is only 1% to 3%. Using conventional breeding methods, the seed germination rate is only 0.3% to 0.9%, which will seriously affect The economic benefits of seedlings breeding Therefore, special seed germination methods must be adopted in order to effectively increase the germination rate of embryo seeds.
From January to February, the dried seeds were rubbed and cleaned, then soaked and then soaked in clean water for 10 hours. After the air was taken out and spread out, a layer of sandy sand was used for germination with clean wet sand. On the ground of the room, a layer of seeds is a layer of sand. The thickness of the seed layer is about 2cm to 3cm. The thickness of the sand layer is about 5cm to 6cm. The straw is moistened on the top; if the number of seeds is small, it can be in a large fish tank or In the flower pots, stratification and sand germination are performed. During the germination period, in addition to the need to keep the sand moist, it is also necessary to check it regularly to prevent mold growth during mold growth. Second, to prevent rodents from eating seeds. After 40 days to 50 days, it was found that the seeds could be used for field sowing when they were exposed. Another method is: from the end of March to the beginning of April, put the winged seeds in a woven bag and put them directly in the pond, let it soak for 12 hours to 24 hours. Sowing or sowing.
In addition to requiring loose land, fertility, and convenient drainage and irrigation, it is necessary to deep-freeze the permafrost in the first winter and apply enough base fertilizer. The bed will be set before and after the next Qingming, and then sown. The spacing of the general sowing ditch It is 25 cm to 30 cm and the ditch is 10 cm to 15 cm deep. Spread the seed evenly into the sowing ditch and cover it with a layer of fire clay of about 1.5 cm to 2 cm in thickness. The thickness of the cover soil sowing with wings is not enough for the species wings, and it is covered with straw moisturizing; about 1/2 of the seeds are to be sown. After emergence, the grass was peeled off 2 times, followed by a shady shelter. The bed was always moist, and about 20 days after the seeds were sown, the seed germination rate of the seeds could reach more than 90%.
Pipettes are among the standard equipment of medical laboratory and allow for exact dosing of liquids, e.g. during blood analysis or for determination of various substance concentrations. Depending upon purpose of use, various pipette types are used in laboratories. Pipettes are completed by various sizes of Pipette Tips. Choosing the right pipette tip comes down to the pipette quality relevant to the devices precision.
Yingmed offers a selection of pipettes and various pipette tips for you. With the Number reading variable volume pipette, you can easily choose the desired volume with the push of a button; measurement errors are virtually completely eliminated. When it comes to pipette tips, you have the choice between many sizes.
You can find additional laboratory supplies like Embedding Cassettes,Petri deshes,Blood roller mixer in the Medical Lab Devices category.
Pipettes
Pipette Tips,Plastic Pipettes,Serological Pipette,Multichannel Pipette
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