First, characteristics:

1. Plants tall: Gaobaizhangqiu onion has a fast growing speed, generally 150 to 180 centimeters in height, 200 centimeters or more in high-yield plants, 60 to 80 centimeters in white, and 100 to 120 centimeters in fertility, and 3 percent in diameter in white. ~ 4 cm, up to 5 ~ 7 cm thick, plant weight is generally 1 ~ 1.5 kg, high yield strains can reach 3 kg or more.

2. High yield: Generally 10,000 pounds or more per mu, high-yield fields can reach 15,000 to 20,000 pounds.

3, disease resistance: high white and onion more resistant to purple spot, downy mildew, gray mold and so on.

4. Quality: The main quality features of the high-white scallion are: light blue and thick, long, hard, pseudo-stem wall thickness, resistant to storage, suitable for long-distance transportation, high net rate, suitable for precision packaging (boxed, boxed) and Supermarket sales.

5, high efficiency: high yield of white shallots, the price is not bad. Such as the fall and winter of 2006, the general scallion sells 0.2-0.3 yuan per catty, and Gaobai Zhangqiu scallion 0.5-0.7 yuan per catty, coupled with high yield, the average mu income is about 4,000 yuan, the highest can reach 5000-6000 yuan, and Other lush onion income is only 1,500 to 2,000 yuan.

Second, plant management methods:

(a) nursery: nursery for the autumn nursery and spring nursery two.

1, the autumn nursery, in Jinan area, to October 5 to October 10 is appropriate, early broadcast easy to twitch, late sowing easy to freeze damage, nursery ridge width generally 80 to 90 cm.

2, the Spring Festival nursery: The end of March to early April is appropriate.

3, with the amount of seed: 3 to 4 pounds per acre.

(2) Transplanting: After harvesting, the wheat can be transplanted and transplanted. The planting is completed at the latest by the end of June. Each acre of onion seedlings can be planted with 5 acres of field, with a ditch of 80-90 cm and a ditch depth of 40 cm. 15 ~ 20 cm) to prepare onions, plant spacing 3 ~ 4 cm is appropriate.

After entering the autumn festival, the temperature is significantly reduced and the air humidity is reduced. The appropriate temperature and humidity make the green onions enter a period of rapid growth. During this period, field management must be strengthened to promote roots, strong trees, and soil softening. , To create a suitable growing environment for the formation of light blue, so as to improve the production and quality of green onions, in production specifically to grasp the following four points:

1. After the top dressing began, the temperature gradually decreased, and the root absorption function was transferred to a vigorous period. After entering the flourishing period, the need for water and fertilizer increased. During the period from the beginning of autumn to Bailu, the principle of watering was “light pouring, morning and evening pouring. "Combined with watering topdressing" leaf fertilizer, per acre applied cooked farmyard fertilizer 1500 kg, superphosphate 20 ~ 25 kg, potassium sulfate 10 kg, in order to promote the rapid development of leaves.

After the white dew, the weather is cool, the temperature difference between day and night increases, green onions into the light blue and white formation period, is also a critical period of fertilizer management, in the white dew to the equinox, topdressing with fast-acting nitrogen fertilizer, with urea as the best, about 20 kg per acre Shi It is appropriate to add 15 kg of potassium sulfate.

The principle of watering is "ground pouring, heavy pouring," and the soil is often kept moist to meet the growing needs of light blue.

After the frost falls, the weather is getting cooler, the leaf growth is slowing, and the transpiration of the leaf surface is reduced. Watering should be gradually reduced. The watering should be stopped 7-8 days before harvest to improve the storability of Welsh onion.

2, cultivate soil to soften the farmland cloud: "If you want onions to get up, the soil must be cultivated to the heart." The actual production shows that the deeper the green onions are, the longer the light blue.

Soil cultivation is an important measure to soften leaf sheaths, prevent lodging, and increase yield and quality of light blue rice. From the beginning of the autumn to the harvest, soil should be cultivated 4 times (early autumn, summer heat, white dew, and autumnal equinox), and the thickness of each soil should be cultivated to the leaf outlet of the uppermost blade. It is advisable to not bury the heart and leaves so as not to affect the growth of green onions.

3, prevention and control of pests and diseases in time to prevent the damage of leaf miner, in the slow after the seedlings can be sprayed 1.8 avermectin EC 1500 times, or 75 ciprofloxacin WP 3500 times, or 72 grams of WP wet 600 to 800 times liquid In the spawning period until the early stage of larval hatching, spray 20 fenvalerate EC 2000 ~ 3000 times, or 2.5 deltamethrin EC 2000 times, spray every 7 ~ 8 days, and even spray 2 ~ 3 times.

When the leaves of green onions appear black spot or purple spot, 50 times of Carbendazim WP can be used 500 times, or 70 times of MnZn wettable powder 600 times, etc., and sprayed once every 7 to 10 days. Continuous 2 ~ 3 times. Drugs should be used in rotation to prevent drug resistance.

4, timely harvesting farmer's cloud: "cold dew does not receive onions, the longer the heart and more space." Scallion should be timely harvest, early harvest, light blue is not fully inflated, resulting in reduced production, late harvest, the loss of water at the top of the pseudo-stem becomes soft, affecting the value of green onions. The southern and central regions of our province are generally harvested before the beginning of winter

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