Summer is a crucial period for the growth and development of citrus. To ensure the high quality and high yield of citrus, it is very important to strengthen summer management. The specific measures for summer fertilization are to apply top-up fertilizer or biogas slurry every 20 days, which can be 30 to 50 cm away from the trunk. Gully application or spread, according to the size of the tree to determine the amount of fertilizer, fertilization per plant 50 to 200 grams. At the same time, do a good job of foliar fertilization and timely supplement of the trace elements required by the tree.

Collagen

Collagen is the most abundant protein in mammals, accounting for 25% to 30% of the total protein. It is widely present in all tissues from the body surface of lower vertebrates to mammalian bodies. Collagen monomers are long cylindrical proteins with a length of about 280 nm and a diameter of 1.4–1.5 nm. It consists of 3 polypeptide chains that are supercoiled around each other.

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