Green feed corn silage

Variety of choice

It is necessary to select varieties with high yields per unit area of ​​green feeding. Varieties should have tall plants, lush stems and leaves, lodging resistance, resistance to pests and diseases and premature aging. Green feed production should reach 4500-8000 kg/mu in spring, and 3000-4000 kg/mu in summer. The quality of stems and leaves can affect the quality of green feed. The green-feeding corn silage variety requires 6% sugar content in stem juice, more than 7% of whole plant, and less than 30% crude fiber content. Ears generally contain higher nutritive substances, and selection of ear corn can effectively improve the quality and yield of green-fed silage corn.

The selection of green-feeding corn silage varieties also requires good palatability, high digestibility, high levels of starch, soluble carbohydrates and protein in green feed, low cellulose and lignin content, good palatability, and high digestibility. The brown brown variety of maize leaves contains lower lignin, which is controlled by the bm3 gene. However, the material introduced into bm3 is often poorly ground and the dry matter yield of the grain is low.

Recommended variety

The "Green North China 410" and the "Northern China 412," which were bred by Shanxi Northern Crops Co., Ltd. and approved by the Shanxi Crop Variety Approval Committee in April this year, are now the better new varieties in the country. The characteristics are as follows: Zhongbei 412 is suitable for sowing on April 18, and the seedlings will be raised on May 7, with neat emergence. Pulling male on July 25, drawing on the 29th, late-maturing. Strong growth potential, plant height, plant height 330 cm, thick stems, moderate spike position, ear height 165 cm, good uniformity. Green conservation is good, roots are developed, and lodging resistance is strong. High resistance to dwarf mosaic disease, resistant to various leaf spot and rust.

Zhongbei 410 is suitable for sowing on April 18, and the seedlings will be raised on May 5. Pulling male on July 22, drawing on the 28th, late-maturing. Strong growth potential, plant tall, plant height 369 cm, ear height 160 cm, good uniformity. Stem thick, aerial root development, strong resistance. Good green retention, high resistance to short mosaic disease, smut, resistance to various leaf spot, rust.

Cultivation and harvesting of green-feeding silage corn

According to the local production conditions and planting methods, the varieties with high biological output, many spikes, and disease resistance should be selected and properly planted. Green-feeding silage corn is harvested early and can be plucked early. Some places can be planted in two seasons in a year. The key technology is to plant in early spring in the first quarter, cover film to promote early-onset, and interplant in the second season to avoid rainy sprouts.

The timely harvest of green-feeding silage corn is very important. The optimal harvest period is when the water content is 61%-68%. This ideal water content occurs from the galingo line to the 1/4 milk line (ie, the milk moves down to the grain 1/2-3/4. Stage) If the moisture content of the feed exceeds 68% or it is harvested before the quasi-dairy stage, the dry matter accumulation does not reach the maximum amount; if the water content reaches below 61% or the grain milk line disappears, the stems and leaves will be aged. This leads to a loss of production. Therefore, carefully observe the location of the milk line before harvesting. If the green-fed silage corn can be harvested in a short period of time, it can be harvested until the 1/4-dairy stage. However, if it takes 1 week or more to harvest, it can be harvested from the half-dairy stage to the 1/4 dairy stage.

Seeding capacity of green-feeding silage corn: appropriate increase of sowing amount for single culm varieties, and sowing of about 3 kilograms per mu. Machine sowing about 2.5 kilograms per mu. With branched varieties to reduce sowing. This kind of corn mainly harvests the upper green body, so it has a higher density than grain corn. The row spacing is generally 6025 cm, and 4000-5000 basic seedlings are needed per mu. Some green-feeding silage corn varieties have branching, so they cannot be debranched when they are seedlings. In addition, the varieties need a large amount of fertilizer, need to apply 5000 kg / acre organic fertilizer as a base fertilizer, seedlings 30 cm high when the compound fertilizer 30 kg / acre. Before mulching, cultivating the soil should be done in order to facilitate irrigation and drainage and enhance lodging resistance. Water should be poured before the jointing, such as drought. After 40 days of tasselling, 40 days after harvesting, it can be harvested at the late milking stage or at the early stage of waxing. Early harvesting will affect the yield. If you harvest too late, the increase of yellow leaves will also affect the yield.

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