What is Ge Xianmi?

Gexianmi is a kind of cyanobacteria plant that grows in wet places.

Gexianmi, commonly known as Xianmi, ceramium, Lysimachia christinae, Auricularia auricula, Auricularia auricula. Nostoc commune, cyanophyta. Algae are gelatinous, spherical or other irregular shapes, blue-green or yellow-brown. The cells are spherical, and most of them are connected in a string of beads, and the surface is covered with colloid. Idioblast is located between the cells of the filaments, and the filaments of juvenile algae are often located at the top. In the process of reproduction, most of them produce thick-walled spores, which are often beaded.

It is green when wet and grayish black when dry. Epiphytic in sand and stones in water or wet soil. It is distributed all over China, with the most famous one produced in Sichuan. Edible. It has the ability to fix nitrogen. Its natural distribution areas are all in the subtropical zone, and the annual daily average temperature is12.5℃ ~ 21.1℃; The annual average rainfall exceeds 1000 mm.

There is plenty of sunshine, for example, the annual average sunshine hours in Hefeng, Hubei Province are 65,438+342 h, and the sunshine hours in Kaiben Township, Cengong County, Guizhou Province, Shuanghe Town and Huang Tu Town, Sichuan Province are also above 65,438+000 h, which provides a favorable guarantee for the growth and development of Gexianmi.

Farmland cultivation method of pueraria lobata;

1, sowing

The growth period of Gexianmi is 165438+ 10 to May of the following year, mainly in the heating period from late February to mid-April. The sowing time is from 1 1 to February of the following year, which can be flexibly mastered according to the actual use of rice fields. Get ready and sow after a week of irrigation in the cultivation area. Before sowing, the pH value of the water in the cultivation field is adjusted to 6.5-8.8, and when sowing, algae seeds are evenly scattered in the cultivation field according to the sowing amount of 20-60g algae seeds per square meter and exposed in the surface soil of the cultivation field.

2. Tian Tuan management

Waterfowl should be prevented from entering the farm during the breeding period, and the water depth of the farm should be kept at 2 ~ 16 cm, so that the pueraria lobata population can be completely submerged below the water surface and the stability of the soil layer and water layer of the farm can be maintained. Every 15 ~ 30 days, magnesium chloride 100 ~ 1000 g, calcium chloride 50 ~ 50~500g and dipotassium hydrogen phosphate 50 ~ 2000 g are added to the farm. When the water surface of cultivated fields freezes in winter, it is necessary to avoid the population of pueraria lobata being frozen by the ice. In case of freezing, the water depth of the breeding field should be increased.

Step 3 harvest

After entering April, with the increase of temperature, the growth rate of Gexianmi is getting faster and faster. Generally, it can be harvested from the middle and late April to the middle and early May, or it can be harvested in advance according to the needs of rice fields. Every 1m2 paddy field can harvest 300 ~ 800 g of fresh algae from Nostoc kudzu. When the population of Gexianmi is dark green and round, it should be harvested in sunny days and with bamboo utensils. The deep water layer of about 17cm should be maintained, and the population of Nostoc kudzu should be screened with screens with different pore sizes.