2. 10-15 days before sowing and sowing, 4-5 days of drying can increase the germination rate. The spring sowing of Sudanese grass in the north, the earlier the sowing, the higher the output. Sow when the soil temperature stabilizes at 10-12 °C. The spring is sown in the spring from February to March. Summer sowing is planted immediately after the harvest of the previous crop. The middle and lower reaches of the Yangtze River are planted around the end of April. Sorghum and multi-flowered ryegrass are planted in the fall and the sowing date can be postponed, but it should not be later than late May. In cold regions, in order to enable the Sudanese grass to feed grass earlier and fully ripen before frost, germination can also be used to sow seedlings, soaking in warm water for 7 to 10 hours before sowing, and then at a temperature of 20 to 30°C. Accumulate it and cover it with plastic cloth, water it once or twice a day, and sow until it is half white. Drilling, spacing 30 cm, sowing rate of 2.5-3 kg per mu. Sudan grasses and mixed beans such as beans, peas, cowpeas, lentils, and wild soybeans can increase the yield and quality of fresh grass. However, these legume crops have poor reproducibility, and the mixed crop should be dominated by Sudan grass. Drilling, collecting grass with a line spacing of about 35 centimeters, sowing 1.5-2 kg per acre; income spacing of 45-60 cm, sowing 1-1.5 kg per acre.
3. The field management of Sudan grass seedlings is weak and weed-proof. After emergence, we must timely cultivating and weeding. Weeding and weeding once every 10-15 days. The unigrass of Sudan's grassland is sprayed with 25% of 2,4-D herbicide solution for 2-3 times at the seedling stage to eradicate broadleaf weeds. Sudan grass grows rapidly from the tillering stage to the booting stage, and requires more fertilizer. In addition to the application of basal fertilizer, in principle, once per week, the wolfberry should be topdressed once, and each time, the amount of ammonium sulfate 10 kg or a certain amount of decomposed human urine and feces should be applied. Timely irrigation.
Sudan grass is vulnerable to armyworms, aphids, aphids and other hazards. If cutworms are used as green fodder, if they are harmed by locusts, they should be used immediately by Chuanxiong;
4. The growth period for reserving sudangrass is about 120 days. In areas where sorghum and cotton are cultivated, seeds can be produced. In order to ensure the purity of the seeds, the fields must be kept away from the sorghum field. Farming is generally not green. When most of the seeds are hardened, they generally produce 70-1OO kg per mu. Sudan grassland is produced in northern Africa and is an annual plant of sorghum. Plant height 2-3 meters, 20-32 per plant. The stem is round, smooth, and the section is more inflated. The root systems are well developed and are mainly distributed in 50 cm soil layers. Adventitious roots often occur in 1-2 sections near the ground. Leaves about 50 cm long, the surface hairless, dark green leaves. The seeds are light yellow or tan, and the grain weight is 10-13 grams.
Sudangrass is a thermophilic crop that can safely overwinter in the subtropics and die after a temperate frost. The minimum temperature for seed germination is 8-10°C. It is hi light, not tolerant to yin. Insufficient light can not only reduce the number of births, but also reduce the yield and quality. Post-harvest sudangrass has strong drought tolerance, but sufficient moisture can significantly increase the yield and quality of fresh grass. Sudan grass has lax soil requirements, all kinds of soil can be planted, and grows best on sandy loam or clay loam. In general cultivation conditions, the fresh grass of Sudan grass yields 4000-6000 kilograms per mu. The grass supply period is from late June to the end of September. Because there are more stalks, they are fed to cattle and sheep. They are generally cut and used before heading. Feeding fish, rabbits and geese are generally used for cutting at a height of 70-80 cm. The crude protein content before jointing until heading was 8-10%, and the palatability was poorer than other forages. Sudan grass silage, castrated from the booting stage to the heading stage. If silage together with the mixed legumes, good quality silage can be obtained. Sudan grass modulates hay and castrates at the heading stage.
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