String herb
The pine cone herb, also known as chrysanthemum grass, is native to the humid high grasslands of central North America and was introduced to China from North Korea in the late 1970s. The herb is a perennial grass of Asteraceae, with a plant height of 2.0--3.5 meters and can be used for more than 10 years. The pine cone herb is warm, cold, and heat-resistant, and has good length in the slightly acidic-to-neutral sandy loam and loam soil with an annual precipitation of 450 mm or more, and has poor salt resistance and rot resistance. Therefore, in order to obtain high yield, it must be Apply enough water and fertilizer. The output of large-leafed pine vanilla is quite high. In the year of planting, 3000 kg of fresh grass can be collected per mu. In the south of China, it can be cut 5 times a year, producing 25,000 kg of fresh grass per mu, and more than 30000 kg of foreign grass. The pine cone herb not only has high yield but also good quality. The accountant for dry stem quality was 88.1% and the crude protein content was as high as 20.6%.
String pine herb cultivation technology
The pine cone herb is native to Canada and the United States. It has been introduced into China for many years and has a good planting effect. It is suitable for feeding pigs, cattle, sheep and rabbits.
First, characteristics 1, high yield. The annual production of fresh grass per mu is more than 5,000 kilograms, and that of 2--3 years is up to 4-6 kilograms.
2, perennial. A plant can be used continuously for more than 10 years. Castration 3 - 4 times a year.
3, rich in nutrition. The grassy protein content was 18-23%. It is rich in 17 kinds of amino acids, vitamins and trace elements.
Second, the cultivation techniques The seeds of the pine cone herb are Samara, black-brown, watermelon subtype, a thousand grain weight 21--23 grams, 60--75 kilograms per mu.
1. Before sowing: Leveling the grass and applying enough base fertilizer can be planted every year from the third to the tenth of October. Seeds need to be soaked in warm water of 30°C for 12 hours before planting and then on-demand, with a depth of about 1.5 cm. should. Usually 10-15 days of germination, early spring when the ground temperature is lower should be transplanted after nursery, the nursery should be covered with plastic film or hay, in order to increase the temperature to play a role in conservation.
2. Transplantation: When the seedlings grow to 3--4 leaves, they can be transplanted. The transplanting density can be divided into the following categories according to the purpose of use: 800-1000 plants/mu of seedlings in the seed field, and the grass is used as feed. The site is set at 4000--5000 plants/mu.
3. Field management: As a result of small seeds, seedlings growing slowly, poor drought tolerance, and prone to weeds, weeds must be watered in time, grow vigorously, have a well-developed root system, and produce large amounts of grass. Need to provide large water, big fertilizer, with a view to ensuring a higher yield of grass.
4. Harvesting grass or harvesting: Mowing the grass field for more than two years, harvesting 3--4 pounds a year, leaving 15-20 centimeters at the base of mowing to facilitate growth, and then pour it after 2 or 3 days. Water top dressing.
The stems of the stems are thick and tall, and the stems in the growth period are crisp and juicy, golden flowers resemble sunflower flowers, fresh grasses or comminuted hay are used to feed pigs, cattle, sheep and other substitute parts. The daily weight gain is significant and the benefits are considerable.
Hechun City, Shandong Province Peony District Science Association Feng Chunxian
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