Carrot cultivation notes
A spectrometer is a scientific instrument used to separate and measure spectral components of a physical phenomenon. Spectrometer is a broad term often used to describe instruments that measure a continuous variable of a phenomenon where the spectral components are somehow mixed. In visible light a spectrometer can separate white light and measure individual narrow bands of color, called a spectrum. A mass spectrometer measures the spectrum of the masses of the atoms or molecules present in a gas. The first spectrometers were used to split light into an array of separate colors. Spectrometers were developed in early studies of physics, astronomy, and chemistry. The capability of spectroscopy to determine chemical composition drove its advancement and continues to be one of its primary uses. Spectrometers are used in astronomy to analyze the chemical composition of stars and planets, and spectrometers gather data on the origin of the universe.
Examples of spectrometers are devices that separate particles, atoms, and molecules by their mass, momentum, or energy. These types of spectrometers are used in chemical analysis and particle physics.
Visible Spectrophotometer,Lab Fluorescence Spectrophotometer,Single Beam Spectrophotometer,Uv Spectrophotometer Unimedsume Trading Co., Ltd , https://www.ums-labmed.com
1. Before the election, it is best not to grow carrots year after year. It is best to use peanuts and other legumes before harvesting.
2. Select the land to use deep sandy soil with good drainage, deep soil and convenient drainage and irrigation. Before the harvest, timely deep loosening, generally in the depth of 12-15cm, deep depth of 30cm or more.
3, soil preparation and fertilization in spring preparations, every 667 square meters (1 acre) before the application of high-quality full-fermented farmyard fertilizer 4000-5000 kg, after the ridge ridges in time, ridge width 65cm. When ridging, apply compound fertilizer 10-15 kilograms deeper. Second, species selection and treatment
1. Variety selection According to the type of local production ecological conditions and market demand, suitable varieties suitable for ripening period, high yield and high quality should be selected according to local conditions, such as regular five-inch, six-inch, hybrid carrot and other high-quality varieties.
2. Seed selection seeds should be selected as new seeds. Before sowing, they must be carefully selected to remove grass seeds and debris, so that the seed's netness can reach 95%, the purity can reach 90%, the germination rate can reach 80%, and the quality can reach level 2.
3. Seed treatment before sowing, drying for 2 days. After removing the seed bristles, pour the seeds into 40°C water for 2 hours soaking. Drain the water and put it on the temperature of 20-25°C to germinate for 3-4 days. Seed When exposed, you can sow.
Third, timely sowing date should be based on the characteristics of varieties, natural conditions and the pre-acquisition period of local carrots to determine. Generally, on June 15-20, in general, no more than August, to master the lyrics in a timely manner on the ridge double seeding broadcast sowing depth 2cm, with sowing along with soil. 20,000 seedlings per 667 square meters, the amount of 250-300 grams.