High-yield cultivation techniques of Mexican corn grass
As a new type of high-quality and high-yielding pasture, Mexican corn has good palatability and is very popular among farmers. Mexican corn has the advantages of high yield, strong resistance, wide adaptability, strong lobulation force and regenerative capacity, high nutritional value, good palatability and wide application. The high-yield cultivation techniques are introduced as follows:
First, choose a good species
Mexican corn grass excellent 12 is not only suitable for plots with good fertilizer and water conditions, but also can be successfully cultivated on poor soil. Mexican corn grass excellent 12 enjoys a warm and humid climate, can withstand a sustained high temperature of 40 ° C, its stems and leaves are sweet, crisp and juicy, and the palatability is excellent. The fresh grass can feed 50 sheep and 500 geese, etc. It is extremely impressive. It is the first grass in China with a production of over 30,000 kilograms and a comprehensive economic benefit of over 20,000 yuan.
Second, the rotation
Mexican corn is not strict with the previous crops, and should be planted after crops such as wheat, legumes and leafy vegetables. It is a good middle crop, with low soil fertility and less weeds, so it can be used as a good predecessor for a variety of crops such as wheat, beans, roots and melons.
Third, land preparation
Mexican corn roots are deep into the soil, requiring deep ploughing, and deep ploughing can create loose arable soil, which is conducive to increasing production. In the depth of the tillage layer, the greater the depth of the general tillage, the greater the increase in yield. The depth of ploughing should not be less than 22 cm, and more preferably 40 cm or more.
Fourth, sowing and cultivation techniques
Mexican corn is highly adaptable, heat and drought resistant, and salt and alkali resistant. The whole growth period is 200 to 260 days, and the appropriate sowing time can be selected according to the growth period and local climate characteristics. In the spring, the early broadcast should be carried out in the late March to the beginning of April. On the land that has been leveled in the front, a 1.5-meter-wide raft will be made, and the bottom fertilizer will be applied to repair the drainage ditch. The seeding amount per acre is 1.5 to 2 kg, and the seeds are soaked in warm water of 30 ° C for 24 hours before sowing. According to the line of 40 cm and 60 cm, it is carried out by means of seeding or seedling transplanting. When planting, just cover the fine soil. After sowing, the surface should be kept moist, and the seedlings grow slowly within 30 to 50 days. Pay attention to weeding. When the height of the seedling is 40 to 60 cm, the soil is cultivated in the middle, the nitrogen fertilizer is applied, and the water is poured during the drought. The hole spacing of the hole is 50 cm 50 cm, 2 to 3 seeds per hole, and the seeding depth is 2 cm. Slow growth during seedling stage, pay attention to cultivating and weeding, accelerating growth from tillering to jointing stage, 5-10 kg of nitrogen fertilizer per mu, and castration when the plant is as high as 100 cm, leaving 10 cm high. After the castration, the quick-acting nitrogen fertilizer is applied to promote the growth of the regenerated grass.
V. Field management
Weeding should be carried out once in the seedling stage or in the early stage of transplanting and keep the soil moist. For each harvest, you can combine irrigation and weeding loose soil on the same day or the next day. Apply 5 kg of urea per acre. If it is attacked by aphids or red spiders during the growth period, use 40% dimethoate emulsion 1000 times to spray and kill. . It must be noted that after spraying pesticides, it takes at least 10 days to castrate, so as to avoid organophosphate poisoning after eating. The grass damage is mainly in the early stage, and it should be removed by hand. Try not to use or use herbicides as much as possible. In the event of pests and diseases, if the level of economic harm is not reached, no drug control can be used; if it is necessary to use drugs for prevention and control, animal or plant pesticides that are harmless or less harmful should be used, and the number of uses should be reduced as much as possible.
Sixth, harvest
Mexican corn grass is 3 meters high and has abundant foliage. 30 days after sowing, it enters the rapid growth period, and each plant can be divided into more than 20 strains, and many can reach 60 to 70 strains. Harvesting begins when the plant height is more than 50 cm after 45 days of sowing. It should be kept at 5 cm for quick growth. After that, it can be cut every 20 days, and the whole growth period can be cut 8 to 10 times. If properly managed, it can produce more than 30,000 kg of green forage per acre.
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