Techniques hybrid corn

Techniques hybrid corn
I. INTRODUCTION SOME maize hybrids.

 Currently, corn germplasm Vietnam is rich and diverse in species, growing time, the ability to adapt ... to meet the rising demand for corn to farmers in the country. However, for the farming conditions in An Giang, the well-adapted maize hybrids can be divided into two groups.

1. Same-day: growth time from 100-105 days.

2. Short-day varieties: There is growing time from 86-95 ngay.84029312012Bap1 maize planting techniques

NOTE: Before sowing the seeds should be dried to stimulate germ, drug treatment to control ants, termites, worms, seeds, the germination of seeds have reached over 80%.

II. PLANT ENGINEERING maize hybrids.

1. Select the land.

Hybrid maize can be grown on many soils but is best suited alluvial soil deposited over the year, followed by red soil. Since the porous soils, nutrients, depth of topsoil and appropriate humidity. Do not hybrid corn on heavy aluminum contaminated areas, arid areas or areas too waterlogged.

2. Crop and models of hybrid corn.

Hybrid maize can be grown year round, during the dry season and growing season mua.Tuy time and tolerance of seeds and other plant structure reasonable layout for each region. Attention needs to avoid sowing the corn bear flag beard sprayed hot weather good for corn beans.

Hybrid corn should note the following issues:

- There must be enough water in the dry season.

- No flooding during the rainy season.

In general these models have grown nù corn, yellow corn localities previously corn hybrids that can be grown (as crop rotation, intercropping with rice floating season, intercropping with soybeans, green beans, cassava on soil specialist color ...). Also hybrid maize can be grown on the farmland (especially rice mounds) on each adjacent area.

3. land.

Because the root system of hybrid corn grows more and deeper, usually have multiple roots nom foot should land should be about three inches deep plow, cultivators clods left fist half size is medium. Normally for corn land plowed up 2 times to the soil, airy foam.

If planting corn in the rainy season should be slotted drainage or raised beds to waterlogging.
* Note: do elect to plant damaged stamped on the spot later.

4. Planting density.

- For long-day varieties planted at 80 cm x distance of 25 cm, which corresponds to the density of 50,000 plants / ha.
- For short day varieties, low trees should be planted at a distance of 75 cm thick x 25 cm with density of 53,300 plants / ha.

The winter-spring and autumn and winter should grow thicker thu.66792772 summer (1) Technical hybrid corn

* The amount of seed needed 12-17 kg / ha depending on the variety. Each hole 1 seed sowing, pruning with 3-5cm depth, filled with mixed nuts with husk ash Basudin 10H drug, dosage 5H Bam 8-10 kg / ha to prevent insect bites out (while taking these drugs should be For very high kidney toxicity).
5. Fertilizers.

Highly adaptable corn to nitrogen in corn hybrids without tire dump phenomenon based fertilizers such as rice, but depending on which quantitative varieties of fertilizer for the most effective.
* The amount of fertilizer for one hectare (10,000 m2).

- Urea: 300 kg.

- DAP: 150-200 kg.

- Potassium: 100-150 kg.

For land areas as they can be replaced by DAP Supper with doses of 450 kg / ha (equivalent to 150 kg phosphorus in DAP).

* How to apply:

- Basal: DAP fertilizer and 1/2 whole Kali. May apply more manure (if any), manuring and finished installing it and then proceed to sowing.

- Four times 1: At about 25-30 days after sowing, fertilizers Kali 1/2 and 150 kg urea remaining. Combining weeding, digging, earth origin, should be applied in two edge rows to plant easy to use, and balanced development of the root system. Note when applied at this stage, small trees should be careful fertilizing down and slightly to landfill, composting does not stick to the leaves, causing leaf burn.
- Four times 2: At about 45-50 days after sowing, 150 kg of urea fertilizer. Niches hoe between rows 10-15cm deep plowing to break into it, in combination with high grass and earth origin.
To develop good plant growth while promoting maximum efficiency of fertilizer every 5-7 days with water to dilute the manure nitrogen for corn irrigation section. Urea Fertilizer right, potassium distal 5-7cm, absolutely can not be mixed with potassium Ure, finished fertilizers to landfill should not fertilize when the soil is too dry or too moist.

6. Watering.

Mainly corn is irrigated by sprinkler irrigation methods. Wetting are whole fields one day after sowing to provide enough moisture for germination (usually people wait rain before sowing). Depending on soil conditions and weather appropriate water supply. Especially in the period bear flag, spray beard and fruiting (period 45-75 days after sowing). Irrigated corn may overflow as it drains immediately thereafter to ensure adequate soil moisture. Note ensure adequate moisture for flowering plants before and after 20 days.

7. Weeding.

Sprayed herbicide on the field with 1-1.2 liters dose / ha two days after sowing when soil moisture (one day after the first watering). Combining weeding original earth in stages 15 and 30 days after sowing.

8. Care.

NPK 16 20 0 Technical 13S hybrid corn

Must fertilize accordingly with each corn hybrid

- After 5 days sown field tested to stomp up the areas that do not grow enough crops to guarantee, ensure productivity.

- When the corn grows, the leaves are about 3 lopper check in the dust grows too thick, trimmed periodically (2nd) when the plants are 4-5 leaves. If pruned regularly late will affect productivity.

9. Pest prevention.

a. Depth:

Timely detection, the new control should adopt effective measures to prevent damage by the sanitary field, burning the crop residue of the previous crop to kill the worm eggs before sowing. At each different periods have different pests, including a number of insect pests affecting the development of maize as: borer, deep fruit and omnivorous worms. Padan 4H or 10H Basudin use or other drugs to prevent grain borer and fruit borer, by removing a small handful of drugs (3-4 seeds) on 20 and 40 maize throat days after sowing.

b. Disease:

Important diseases in corn is small leaf spot disease, leaf spot disease of large and sheath blight. Therefore to prevent these diseases should handle seed or injection drug Dedicated seeing symptomatic treatment.

III. HARVEST.

Determine the time of harvest corn corncob by looking at the top left and bottom left. When dried leaves wrapped fruit, hard seeds, chuckle nuclear test, if at the foot of the black pigment particles had enough ripe corn ready for harvest. Should fuel left exposed in the field 5-7 days before harvest. Then peel left some sun exposure (20-24% moisture around) for separating grain harvest rate reduction tank cracked. If the beans in storage should also 14-15% moisture. Maize leaves after harvest should plow buried in fields to improve the soil and provide nutrients for the next crop