Buckwheat is divided into four varieties: sweet buckwheat, bitter buckwheat, winged buckwheat and rice buckwheat. People are more familiar with buckwheat and bitter buckwheat.

There are about 100 tartary buckwheat varieties (including varieties and subspecies) in the world, but they are generally divided into two categories: black tartary buckwheat and yellow tartary buckwheat.

The main differences are:

1, the shell of tartary buckwheat is yellow-gray, and the shell of tartary buckwheat is black, but it is difficult for ordinary people to distinguish it with the naked eye after hulling.

2. The yield of yellow tartary buckwheat is relatively high, generally about 500 kg per mu, while that of black tartary buckwheat is generally less than 200 kg per mu.

3. The yellow tartary buckwheat generally grows in the mountainous area with an altitude of 1500m, while the black tartary buckwheat generally needs to grow in the mountainous area with an altitude of 2000-3000m.

4. The nutritional value of yellow tartary buckwheat is low, which is about a quarter of that of black tartary buckwheat.

Extended data:

The role of buckwheat

1. hypotensive effect After feeding rats with feed containing buckwheat flour for 4 weeks, their blood pressure decreased slightly. This product has a strong inhibitory effect on angiotensin converting enzyme (ACE), and its effective components may be heat-resistant low molecular substances. A tripeptide extracted from buckwheat seed core has IC50 ACE, which is12.7 μ mol/L. Experiments show that it has antihypertensive effect on spontaneously hypertensive rats (SHR).

2. Effects on Blood Lipids and Blood Glucose After eating buckwheat flour for 4 weeks, the proportion of high-density lipoprotein-cholesterol in total cholesterol increased obviously, while very low-density lipoprotein-cholesterol, very low-density lipoprotein-triglyceride, low-density lipoprotein-triacylglycerol and high-density lipoprotein-triacylglycerol decreased obviously, and the blood sugar decreased, and the oral glucose tolerance improved.

3. Other functions include three trypsin inhibitors (TI)*** extracted from dried buckwheat seeds (TI 1, TI2, TI4). Besides inhibiting trypsin, TI 1 and TI2. The water extract of buckwheat pollen has similar anti-iron deficiency anemia effect as ferrous sulfate. The rats with drinking water extract for 35 days grew well and the main organs were not damaged.

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