Cultivation methods and matters needing attention of sunflower

-, reasonable rotation, select stubble □. Sunflower is not suitable for continuous cropping and planting in low-lying land prone to waterlogging, and the selection of previous crop is not strict. Except sugar beet and deep-root forage, other crops can be used as the first crop of sunflower. Sunflower has strong adaptability and is the most suitable for planting in sandy loam or loam soil with deep soil layer and high ph value of 6Mel 8.

Select superior varieties and deal with them. Select the excellent varieties with high yield, good quality, good marketability, resistance to leaf spot, resistance to Sclerotinia sclerotiorum, low void rate, high germination rate and strong germination potential, and carry out seed treatment to give full play to the role of "make the best use of the seed and make the best use of the ground".

Third, apply sufficient base fertilizer and tamp the foundation. Sunflower is a crop that needs more fertilizer. According to the investigation, for every 100 kg seed, it is necessary to absorb 6 kg of nitrogen, 26 kg of phosphorus and 86 kg of potassium from the soil, apply sufficient base fertilizer before sowing, and achieve the combination of organic and inorganic. Per hectare, 30 to 40 cubic meters of mature and fermented organic fertilizer (preferably ash soil manure), 150 kilograms of ammonium phosphate, 200 kilograms of urea and 100150 kilograms of urea. The application of sufficient fertilizer is the basis for the growth and development of rammed sunflower.

Fourth, catch early before the robbery and broadcast early at the right time. Timely early sowing can prevent or reduce the occurrence of leaf spot and Sclerotinia sclerotiorum, and have a great impact on the yield and quality of sunflower. Sunflower growth period is relatively short, sowing time choice is relatively wide, sowing in the first and middle of May, so oil-type varieties should be appropriate late sowing; edible varieties should be appropriate early sowing, in order to prevent greedy green late ripening and yield reduction.

Fifth, reasonable close planting is beneficial to ventilation. Sunflower stalk tall, stem thick, should be reasonable close planting, conducive to ventilation and light transmission, improve photosynthesis. The principle is that high-stem and large-grain varieties should be sparse, short-stalk and small-grain varieties should be dense, oil-type varieties should protect 25000 Mel 30000 seedlings per hectare, and edible varieties 18000 Mel 20000 plants per hectare.

Because the flower of the sunflower is very popular, so it is very marketable, some people specially plant this kind of Compositae herb, but most people plant it is a place to watch, so today we mainly introduce how to raise potted sunflowers. Mainly from the temperature, moisture, light, soil and other aspects to introduce sunflower culture methods and matters needing attention.

1. Upper basin

Usually, when the sown sunflower grows 4-5 young leaves or the flower seedling has taken root, it needs to be transplanted into the flowerpot, and the breeding method of sunflower should be designed here, so it is not recommended for beginners to start from this step. you can buy pots of sunflowers directly from the market for planting.

2. Lighting

Although sunflowers sound very dependent on light, in the cultivation methods and precautions of sunflowers, we do not need special treatment of light to make them blossom normally, because as a short-day plant, it is not particularly sensitive to light.

Although sunflower is not sensitive to light, it does not mean that sunflower does not like sufficient sunlight. Seedlings, leaves and disk all have strong phototropism, so in order for it to grow healthily, sufficient light is very necessary to promote the growth of its plants, stems and leaves.

3. Temperature

Sunflower is very adaptable to temperature. It can grow in high temperature environment and resist certain cold. Seeds can survive at low temperature. Seeds can germinate at 2 degrees. The best temperature for germination is 31-37 degrees. The highest temperature can be between 38 and 40 degrees.

However, it should be noted that in the cultivation methods and precautions of sunflowers, the most suitable growth temperature of sunflowers is 18-30 degrees, and the lowest temperature should not be lower than 10 degrees, otherwise its growth will be restrained. In general, the higher the temperature, the faster the growth. However, it is not recommended to keep it in a high temperature environment for a long time.

4. Soil

Sunflower can grow on various types of soil, even in dry land and saline-alkali land, because it has strong drought tolerance, salt tolerance and waterlogging tolerance, even if the water content is as low as 8.8%, it can still grow normally, so it is a very easy plant to feed.

5. Watering

Although the drought tolerance of sunflowers is very strong, we also need proper watering, because with the increase of light, the evaporation of water will become faster, especially in the flowering season, so we need to replenish water in time, as long as we follow the principle of dry and wet.

6. Fertilization

In order to make the sunflower grow more healthily, the flowers are fuller and more beautiful, it is necessary to apply fertilizer once in the growing period, mainly nitrogen fertilizer in the seedling stage, and phosphorus and potassium fertilizer after budding. It can promote the development of flower buds.

7. Pruning or transplanting

People watch the sunflower, mainly to see its yellow flowers, so in the growth process, it is necessary to prune its extra lateral buds so that it can blossom more. Spraying 89 solution in the 20 days after sunflower germination can inhibit its growth height. If the plant is too high, it can be supported by pillars.

How to grow sunflowers, sunflower culture methods and matters needing attention

Sunflower is a very beautiful flower, which can not only blossom but also produce sunflower seeds for people to eat. I believe that many people will feel happy at the first sight of sunflowers. Sunflowers have large, bright flowers, dense branches and leaves, and they are also novel potted ornamental plants. Do you know how to grow sunflowers? Now let's take a look at how to plant sunflowers with the editor of Huayu Network.

Sunflower culture methods and matters needing attention

1. Choose the right time to plant

Because of the great difference in latitudes between the north and the south of China, there is a great difference in temperature between northern and southern cities. The best temperature for seed germination is 24-28 degrees, which can not exceed 30 degrees. Otherwise, the seeds will be too hot to bear. So how to grow sunflowers?

The growth period of sunflower is 2-3 months. The temperature during the growing period should be above 28 degrees. If not, it is not suitable for planting, for example, even if you have enough temperature for seeds to germinate in autumn, it will be late autumn after germination, so there is no way to satisfy its growth.

2. Sowing seeds

The above describes how to plant sunflowers in time, so how to sow sunflowers? Because it is sown with seeds. To ensure the success rate of germination, it is recommended to do this: tear half a napkin and soak it. Then put the seeds in the napkin and cover them.

Loosen the soil of the pre-prepared flowerpot, and then put the wet seeds in it. Remember that the soil should not be covered too much, only a thin layer, otherwise it will not have enough strength to sprout. Then set the nozzle of the sprinkler to the thinnest state and sprinkle water evenly.

Another way is to wet all the soil in the small flowerpot where you are going to sow (this method is an informal practice of lazy people like me, and the previous one is written in a book), and then wet the seeds in a wet napkin. Then insert the melon seed butt up and pointed down in the soil. Then use a toothpick to put a little bit of dirt over Guazi's ass. Then spray a little bit of water with a kettle.

3. Waiting for germination

How to grow sunflowers? Generally speaking, sunflowers wait for sprouting after sowing, and sunflowers sprout sooner or later. After the sunflower is sown, it is the day waiting for germination. The time of germination is about one week to 15 days. Time varies, according to the moisture temperature sunlight soil seed vitality, is about like this.

During this period, in order to ensure sufficient moisture, after spraying the sunflower seedlings with water every day, spend an hour on the light, and then cover it with plastic wrap or glass sheet, leaving only a small seam to breathe.

4. Move the basin

Sunflower bud has 1-2 cm, grow cotyledon true leaves, anyway, after growing 2 or 3 leaves, it is necessary to consider moving the basin. Change from the small pot where the seeds are germinated to the big pot. Of course, if you have enough flowerpots, I think it's good not to move them. So as not to accidentally hurt the root.

5. Adequate light and fertilizer

Believe that we have a certain understanding of how to plant, then it will be much easier. You should boldly give it enough light and put it in the sun. Water it every morning when the sun doesn't get up, and remember to fertilize it regularly. If the lack of sunlight, grow thin and long, healthy sunflowers should be strong and powerful.

Continue to grow leaves and bask in the sun until one day (about 1.5-2 months later), you will find buds growing between the leaves of the sunflower and the leaves. Remember to still insist on fertilizing. Sunflowers slowly yellow and wither the bottom leaves, but the buds above are getting bigger and bigger, and finally blooming beautiful sunflowers, very beautiful, golden yellow.

More knowledge about sunflowers for flower friends' reference: