Alfalfa (alfalfa)

species in the Genus, the name Mediago sativa L., a perennary herb. Also known as alfalfa, shepherd, grasshopper, road steaming. A good pasture crop, known as the "King of Grass".has become the world's most important feed crop, the world's total of about 33 million hectares of sowing area, its hay production in a variety of bean pasture crown, and the nutritional content is complete, rich in
protein
, trace elements and more than 10 kinds of
vitamins
.the origin of Chinese cultivation in 126 D.D. Widely cultivated in the northern provinces, the middle and lower reaches of the Yangtze River and even the Yungui Plateau at an altitude of 1800m can also be planted. In 1985, the total area sown in the country was about 1 million hectares.root is very long, generally can reach into the soil 3-5m below, the deepest up to about 10m. Side root developed. Stems are upright, smooth and 60-100cm high. The leaves are composed of three small leaves, the eggs are round, the handle is long and smooth, and the leaves are large. Flower purple, total flower sequence, fruit spiral, slightly hairy, dark brown when ripe, not cracked, containing 1-8 seeds. Seeds kidney-shaped, thousand grains weigh 1.5-2.5g. After planting, the growth peak is reached in two or three years, and the life span can be 10-20 years, or even 40 years.warm and semi-humid climate. Very drought-resistant. Water-resistant, in the annual rainfall of more than 1000mm and poor drainage areas should not be planted. Strong cold resistance, when covered with snow can withstand -44 degrees Celsius low temperature. The soil requirements are not strict, but pH6.5-8.5 calcium-rich loam or sand loam is most suitable.in poor soil should be suitable for the appropriate amount of manure and phosphorus fertilizer as a base fertilizer to form a ligen tumor. Appropriate amounts of lime should be used in acidic soil and 300-600 kg per hectare when soil pH5-6 is used.can be sown all year round, and spring planting should be possible in areas where the spring is good and the wind and sand are less harmful. In areas with dry spring, late frosts and windy sands, the rainy season can be spread in summer. Winter is not too cold, pre-winter plant height of up to 10-15cm areas should be autumn sowing. When using grass pastures or grazing, 15cm or 30cm of line-spacing should be taken, the amount of sowing is 11-19kg per hectare, and the remaining fields should be spread with 60cm wide strips, with a yield of about 4kg per hectare. Suitable for mixing or inter-line broadcasting with crops such as mango wheat and millet.pests and diseases with rusty Uromyces striatus, microbial disease Sclerotinia trifolium, frosty mold Peronospora aestivalis, brown spot disease Pseudopeziza medicaginis and other pests; Pests such as medicaginis, horse Trips tabaci, leaf-jumping worm Bruchophagus gibbus, blind elephant Adelphocoris lineolatus, sub-leaf fly Phytonyzar sp. and elephant nasal worm Hypera postica.alfalfa is the pollination effect of heterogeneity. The average crude protein content of mixed hay was 18.9%, the crude fat was 3.37%, the nitrogen-free leachate was 29.97%, the crude fiber was 26.80%, and the ash was 7.03%. Fresh grass contains about N0.50%, P
2
O
5
0.13%, K
2
O 0.37%.