Corn mulching cultivation technology has been rapidly developed in many places in recent years, and has become a key technical measure for corn yields to a new level. The mulching film is applied to corn production in two ways: field covering and seed bed covering. Now they are introduced as follows: (1) Daejeon direct seed corn mulching cultivation technology 1. The mulching of corn cultivars suitable for mulching cultivation is used to increase the temperature inside the membrane, thereby promoting the early development and maturation of maize. Therefore, in order to make full use of the growing season, the corn covered with the film can be used for a variety of 7 to 15 days longer than the corn grown in the local open field. 2. Appropriate early broadcast Early sowing can increase the accumulation of nutrients in corn. It is conducive to root development, early maturity and increased yield, and is conducive to timely planting of post-crop crops. The varieties used for mulching film cover have a longer growth period. Generally, they are high-yield varieties that are not mature in the open field in the local (cold area). In order to ensure timely maturity, they should generally be 7 to 10 days earlier than the planting period of open field cultivation. The method of seeding corn covered with mulch film. It can be sown after being sown and then mulched. It can be used according to local conditions. Seeding after the film is first covered. When planting, the hole spacing should be carried out according to the regulations. Use a knife or bamboo to cut the film on the hole and cover the seed. Cover the ash or fat soil. Because the film improves the ecological environment of corn. In particular, some growth limiting factors such as low temperature and drought have been improved. Generally, the planting density of corn is increased by 20% to 30% compared with open field cultivation, that is, 500 to 800 plants per acre. In order to improve the ventilation and light transmission conditions after increasing the density, wide and narrow rows of plants are widely used in the film covering corn. 3. When covering the mulch film, it is required to make the mulch and the glutinous surface (ridge surface) close. Flatten without wrinkles. The edge of the film is as perpendicular as possible. The film edge is inserted into the soil about 10 cm. The film is compacted with soil. 4. Timely membrane-breaking seedlings should be mulched after sowing. After the seedlings are unearthed, the seedlings should be ruptured at the appropriate time. The period of seedling release is preferably 2 to 3 leaf stage. Before releasing the seedlings. If the temperature is high, the membrane should be opened every centimeter or so. It is easy to suffer from cold damage when the seedlings are too early. The method of placing the seedlings is to use a knife or a bamboo piece above the seeding point. Align the seedlings with a "+" or "one" character. The mouth should not be too big. To release the seedlings: after the mouth is finished. The seedlings are gently taken out of the membrane. The membrane is then compacted. The membrane pores are sealed with wet soil. In the same piece of land, it is generally necessary to release all the 2-3 days after the release of the seedlings. Seedling time should be carried out from 9:00 to 12:00 and 4:00 to 3:00 pm every day. It is not advisable to put seedlings at high temperature and windy weather at noon: 5. Field management Corn growth under the mulching conditions. The supply of temperature, fertilizer and water is better. The number of hair roots is much. But the root system is lightly distributed: and the shoots grow rapidly. It is prone to prolonged and weak stems. Therefore, attention should be paid to the cultivation of the soil and the management of the fertilizer and water should be carried out to make the stem grow thick and strong to prevent lodging. Generally, only the panicle fertilizer can be applied once. When the film is not applied, the film can be applied between the rows. In order to facilitate field management, when the corn grows to the 7-leaf stage, the film can be completely uncovered. At this time the temperature rises. The film also has no effect. However, in order to extend the use time of the film, the cost is reduced. In some places, there is always no film peeling off, so that the squat crop continues to be covered by the original film. (2) Plastic film mulching and transplanting technology Corn mulching covered seedlings transplanted. That is, only in the seedbed cover film. After transplanting the field, the open field cultivation method is still adopted. This can not only save the film, reduce the cost, but also facilitate the management of the seedling period. Prevent the seedling stage damage of rats, birds, insects, etc. It can effectively achieve the effect of early maturity increase. This science and technology has been rapidly promoted in mountainous areas below 800 meters above sea level in Hunan Province. It has been well received by the masses. The technical points of film seedling transplanting are as follows: 1. To establish a seedbed bed, you should choose a leeward sun. It is convenient to manage. It is close to the field, the land, the ground or the reserved open space. The bed size is 1.3 to 1.5 meters wide. The bottom of the bed should be flat. It should be slightly lower than the ground. In order to prevent water staining in the bed, a small ditch should be dug around the bed and the drain should be excavated at both ends. 2. Ingredients: Nutritional soil preparation method: 400-500 kg of sifted fertilizer soil per mu. 100-200 kg of high-quality farmyard manure. Fermented cake fertilizer and phosphate fertilizer each 20 kg. Mix well with dilute The water is moisturized. It is moderately formed by hand kneading into a group. The nutrient soil prepared by the next day was made by hand or a pot. The tamper is made of iron-wood structure. It is made into a nutrient 5 with a diameter of 5 cm, a height of 6.6 cm and a weight of 250-300 g. It is placed in a pre-prepared seedbed. It is filled with fine soil between é’µ and é’µ. When draining, the upper part of the crucible is required to be flush. The seedlings can be at the same height. In addition to the use of nutrient nursery seedlings, it is also possible to use nutrient soil block seedlings. After the nutrient soil is prepared and adjusted in the seedbed, a 5 cm x 5 cm nutrient clod is cut with a bamboo piece or a knife. Poke a small hole in the nutrient block. The depth is 1.5 cm. The area of ​​seedbed and the number of hoes should be determined according to the area of ​​transplanted fields and the number of plants per acre. The ratio of general seedbed to field is about 1:35. About 4,000 nutrient mashes per block are used. 3. The sowing date of timely seeding and germination seeding and seedling transplanting. Generally, it should be about 10 days earlier than the spotted live corn planting period. Seeds should be soaked and germinated before planting. Seed one nutrient or nutrient block. Place the roots down. Cover the soil to a thickness of about 1 cm. Then water it. Then cover the mulch. 4. Seedbed management After sowing until the 3rd leaf period. The seedbed management is mainly based on heat preservation. Keep the temperature inside the bed 20~25°C: Before the emergence, it is required to keep the soil moist. In order to facilitate the emergence of seedlings quickly and neatly. When the temperature inside the bed exceeds 30 °C, the film ventilation at both ends of the seedbed should be uncovered. After the 3 leaf period, the film should be uncovered. 5. It is advisable to transplant 4 to 5 leaves at the age of transplanting and transplanting. The local temperature is stable at around 15 °C. When the corn is released from the open field, the seedlings can be transplanted into the field in the morning or afternoon. When transplanting, put it into the hole (or ditch) together with the nutrient bowl or nutrient block. Use the fine soil to cut the nail tightly. Watering immediately after transplanting. Keep the soil moist. For survival. The field management after transplanting is the same as that of live corn cultivation. The above is the main content of high-yield and early-maturing cultivation techniques for corn mulching. This technology is known as “satisfaction project†in many areas. Especially in the impoverished alpine regions, governments at all levels have adopted the film-covering corn cultivation technology as a key scientific and technological project to help the poor. Monosodium Glutamate,Msg Food,Msg Spice,Msg Powder Ningxia Eppen Biotec CO.,LTD , https://www.nxeppen.com
