High-yielding Cultivation Technique of New Maize Variety Longdan 32

Longdan No. 32 is the new high-yield, stable-producing and disease-resistant new corn variety developed through cross breeding for many years in the Disease Control and Breeding Institute of the Institute of Maize, Heilongjiang Academy of Agricultural Sciences. It was approved and named by the Heilongjiang Provincial Crop Variety Approval Committee in 2005. The seedlings of this species grow robustly and grow rapidly. The plant height is 260 cm, the ear height is 90 cm, the ear is cylindrical, the panicle length is 24 cm, the panicle is 4.9 cm, the number of panicles is 14-18, the cobs are pink, and the kernels are half. Horse teeth type, golden yellow, deep shaft fine grain, 100 g grain weight 38 g, bulk density 760 g/L, good product quality. High resistance to corn leaf spot, head smut, drought resistance, lodging resistance, live stalk maturity, mature stalk green shoots, can be used for silage, is an ideal food-feed dual-purpose high-yield corn varieties.

The number of fertility days of this species is about 115 days, and it needs to be ≥10°C active accumulated temperature 2300~2350°C. In 2004, he participated in production trials in Heilongjiang Province, and the average hectare yield was 10193.0 kg, which was an average 9.0% increase over the control variety Longdan No. 13. In high-yield trials in the mature group of Longdan No. 13 in Heilongjiang Province in 2005, a record high of 13770 kg per hectare was achieved, ranking the first in 22 test sites and 18 varieties. According to the production practice in the past two years, the high-yield cultivation techniques for Longdan 32 were summarized as follows.

1 Selection and Site Preparation

Choose the plots with deep plough layers, fertile soil, good physical properties, and well-drained land. This variety is better than fertilizer and water, and the former is preferably soybean, potato and corn borer. In arid growing areas, autumn fall, autumn ridge or autumn fall and spring ridge can be carried out. Spring ridge must be ridiculed and repressed in the top layer in early spring when 14 cm of soil is thawed and frozen, to prevent runoff and to loosen the soil. Create suitable soil conditions for planting seedlings at one time.

2 Scientific sowing

2.1 seed processing

The use of Beinuo Umami seed coating agent, according to the drug ratio of 1:70 to the seed coating treatment, control of seedlings during the underground pests, corn ear black and Clivia seedlings.

2.2 timely sowing

When the soil temperature at 5 to 10 cm in the plough layer stably passes 7~8°C, it can be sown. The best sowing date is from May 1st to 8th.

2.3 sowing method

The lyrical good plots can be used on the ridge mechanical precision on demand, and the poorly placid plots are artificially germinated and ditched to sit on the water, and the planting density is 4.95 to 52,500 plants/hm2.

3 Reasonable fertilization

3.1 Shizu base fertilizer

Apply 25-30 tons of high-quality farmyard fertilizer per hectare, and mix 150 kg of diammonium phosphate, 90 kg of urea, 60 kg of potassium sulfate, and 15 kg of zinc sulfate per hectare. More than cm to prevent burning buds and burning seedlings.

3.2 timely fertilizer

When the corn has 7 to 8 leaves, topdressing 300 kg of urea per hectare, the top dressing area is about 8 cm from the plant, and the top dressing depth is more than 10 cm. Topdressing can be carried out in conjunction with ridges and irrigation can be done in areas where conditions permit.

4 Field Management

4.1 Pre-management

First of all, we must do a good job of reseeding the fields. After the seedlings are planted, we must carry out deep-slowing or shoveling a plow to raise the ground temperature to ensure that the seedlings are fully grown and strong; secondly, we must remove the seedlings and weak seedlings when they are 3 to 4 leaves. , diseased seedlings, so that an equal distance Dingmiao.

4.2 Mid-term management

After shoveling the rake for the first time, shovel it once every 10 days to make three shovels and three rakes.

4.3 Late Management

In mid-August, autumn ridges and large grasses are planted. Conditioned areas can be used to dry stand stalks during the wax ripening period. In addition, attention should be paid to the prevention and control of armyworms at the seedling stage, and attention should be paid to the prevention and control of corn borers after they are grown.

5 timely harvest

When the corn kernel reaches the ripening period, it can be harvested, generally from late September to early October. After harvest, the stems are still green and can be used for silage to improve economic efficiency.

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