First, the biological characteristics of Gynostemma pentaphyllum Gynostemma Gynura Gynostemma species, perennial grass vines, dioecious, shade-tolerant, avoid direct sunlight, hi acidic soil (PH5-5.6), strict requirements on altitude. The phenological period is: the spring equinox germinates, .......
The bitter buckwheat cultivated in spring grows quickly when nitrogen is supplied, and a new leaf can be drawn every 3 to 5 days. The leaves are large, the leaves are thick, the leaves are dark green, and the yield is high and the quality is good. Therefore, the cultivation of bitter buckw.......
The working principle of the new medicinal material cutting machine: the mechanical transmission conveyor chain is used for continuous feeding movement according to the set distance, and the rotary cutter mechanism cuts the mater.......
A look at the source of eggs. Eggs must come from healthy, high-yielding flocks. The ratio of males and females in the flock must be appropriate. Second, see the egg preservation time. The hatching rate of the eggs kept generally for 5-7 days is the highest, and if the ambient temperature is l.......
Jujube is a preferred late-maturing fresh food species, the fruit is nearly round, the fruit surface is smooth and smooth, fruit shape resembles a small round of light apple, hence the name of apple jujube. The average fruit weight of winter jujube is 10.7 g, and the maximum fruit weight is 23.......
First, the role of aerators in improving the ecological environment of ponds In addition to oxygen consumption by fish and shrimp, plankton, benthic animals, phytoplankton (at night), microorganisms, sediments, and decomposition of organic matter all require oxygen consumption. More than 90% o.......
Nutrient loss is affected by factors such as the amount of fertilization, time of fertilization, rainfall, and rainfall intensity. The higher the amount of fertilizer, the greater the risk of nutrient loss; the greater the rainfall and the higher t.......
Freshwater sharks, also known as pangasias sutchi, and pudding fish, commonly known as tiger sharks, are part of the oyster-shaped head, the nymphalidae, and the fish genus, which are mainly distributed in the southeast Asia and are native to Malaysia and Thailand. In other places, China began.......
Stainless steel butterfly valves show rust during use. After metallographic analysis, dyeing test face, heat treatment test face, SEM and other test analysis, the key factor of material corrosion was found because the carbides al.......