How to raise Maize Seedling

Nursery bed seedling raising: make the nutritious soil into the bed surface, then spread the seeds on the bed surface and cover the soil, and bring the soil to raise the seedlings when transplanting. Nutrition cup seedling: using a cup-shaped container or bowl-making machine, the nutrient soil used for seedling cultivation is made into a nutrition cup, and then the seedlings are sown and raised on the nutrition cup, and the seedlings should be transplanted with the cup after they are raised. Soilless seedling: make a seedling plate with wood or other containers, and raise seedlings in the seedling plate by hydroponic culture.

I. the method of raising maize seedlings

1. Raising seedlings in seedling bed

The main results are as follows: (1) first, spread the nutritious soil suitable for raising seedlings into the bed surface, then spread the seeds evenly on the bed surface and cover the soil, and bring the soil to grow seedlings when transplanting.

(2) the thickness of nutrient soil is 6-7cm, which should be compacted and smoothed during the period. This method of raising seedlings is relatively simple. At the same time, the seedling bed occupies less area. Generally, a seedling bed of about 2 meters can provide transplanting seedlings of 1 mu, but it is easy to hurt its rhizome when raising seedlings.

2. Nursery seedlings with nutrition cup

The main results are as follows: (1) the nutrient soil used for seedling cultivation can be made into a nutrition cup by using a cup-shaped container or bowl-making machine, and then sow and raise seedlings on the nutrition cup, and the seedlings can be transplanted with a cup after being nurtured. This seedling raising method can reduce the damage to the rhizome of seedlings at seedling initiation, at the same time, it can shorten the slow seedling period, the survival rate of transplanting is relatively high, and the effect of increasing production is good, but making cups will be more troublesome.

(2) generally, the nutrition cup can be made into a cylindrical or square shape, with a cylindrical bottom diameter of 5-6cm, a height of 7-10cm, and a square shape of 6cm. The number of nutrition cups can be determined according to the planting density.

3. Soilless seedling raising

The main results are as follows: (1) soilless seedling is also known as seedling plate or water seedling, it is a seedling plate made of wood or other containers, which is generally raised in the seedling plate by hydroponics.

(2) this seedling raising method has the advantages of low cost, easy management, and can prevent frost injury and soil-borne diseases in early spring. Generally, it can breed about 10,000 seedlings per square meter and can provide 1.5-2 mu of field for planting.

Common diseases and insect pests of corn and their control methods

1. Large and small spot

The main results are as follows: (1) the leaf blight is mainly harmful to the leaves, and the bracts are also endangered when the disease is serious. it shows a bluish gray dot in the early stage of the disease, and gradually begins to spread in the later stage, resulting in the whole leaf covered with large irregular spots with black mildew-like substances.

(2) the leaf spot is mainly harmful to leaves and stems, and rectangular or oval spots will appear during the disease, during which amoxeta dilution can be chosen to spray and control.

2. Bacterial wilt

(1) bacterial wilt will cause serious harm to corn, the peak of the disease is in the jointing stage of corn, and it is not easy to find the disease, which will cause the whole plant to wilt and die. Generally, if you peel the stem, you will find that the pith inside has turned brown.

(2) because bacterial wilt is not easy to detect, professional agents can be used to irrigate roots at the initial stage of planting corn.

3. Iron beetle

The main results are as follows: (1) the shell of iron beetle is relatively hard and often lurks in the leaves, which leads to the death of corn leaves. When the number of iron beetles is large, it is easy to cause large area death of corn leaves.

(2) during this period, artificial control and chemical control can be used, and chemical agents should be sprayed with pollution-free pesticides, and then the infected leaves should be cut off and burned.

4. Borer

The main results are as follows: (1) the borer, also known as the heart borer, is a common pest in corn, which often gnaws on the stems and leaves of corn and destroys the stem and leaf tissue, resulting in insufficient nutrition of corn, which is not conducive to its growth, and the whole plant will die when the disease is serious.

(2) during this period, professional insecticides can be used to infuse heart or spray control.

5. Rust

The main results are as follows: (1) Rust will mainly harm the leaves, in the early stage, the leaves will appear round disease spots, and there will be rust-colored powder, and spores will appear on the disease spots in the later stage. These spores can survive the winter safely and spread again in the second year. The disease will gradually expand, causing serious harm to corn.

(2) during the period, the hybrid seeds with strong disease resistance can be selected and fertilized reasonably during the planting period. in the early stage of the disease, the hybrid seeds can be diluted with the wettable powder, and should be sprayed repeatedly when the disease is serious.