What caused the death of corn seedlings? These eight reasons are the culprits.

Corn is one of the most important food crops in Heilongjiang Province, and the yield of corn directly affects the income of farmers. From sowing to seedling stage, the phenomenon of rotten buds and dead seedlings often occurs due to improper cultivation, resulting in reduced yield. So what caused the death of corn seedlings? Next, the editor of Tuliu.com will take you to understand the main causes of dead corn seedlings.

1. Improper depth of seed sowing

Under the condition of dry soil, high soil temperature and sufficient light, if the sowing is too shallow, the maize seed can not absorb enough water and can not meet the minimum water requirement for seed germination, resulting in the restriction of seed germination. there will be slow seedling emergence, Kang seed bud, dry mildew or seedling death, resulting in the occurrence of serious seedling death.

If the soil moisture in the field is too high, the sowing is too deep and the permeability is not good, the lack of oxygen in the seeds will cause stifling and dead sprouts, even if the seedlings grow reluctantly, due to the consumption of too much nutrients, diseases and insect pests are very easy to occur.

Second, the sowing time is too early and the soil temperature is low

Sowing prematurely, although the soil moisture in the field is good, if the temperature is too low, it will inhibit the seed germination ability. The decrease of seed enzyme activity and slow germination will cause mildew and rotten seeds or sprouts. As a result, the seeds can not emerge normally, the seedlings are irregular or yellow and prone to disease, and the growth is weak. "catch early before you rob"-it must be based on the specific situation.

III. Poor soil structure and improper tillage

Spring sowing corn is not fine, flat and loose due to the quality of soil preparation. Broken, clean and solid * six-character standard. Maize is particularly sensitive to soil structure at seedling stage. The quality of soil preparation is poor, the soil is hardened by F, the permeability is poor, and the oxygen is insufficient, so that the bud pin of corn can not break through the soil layer. When the seven layers are several centimeters thick, the coleoptile can only come out of the crack, because the ground base is overstretched and consumes too much nutrition and energy. The seedlings are not strong and are prone to disease and death.

4. Poor seed quality and low seed vigor

During the period of seed development, the maturity of the mother plant decreased due to environmental conditions, resulting in the decrease of seed vigor after harvest. When the seeds contain water or the ambient temperature is too high, the vigor of the seeds decreases and the seedlings are not strong. It's not resistant. The seed quality is poor, the size is not good, the seed is easy to be damp, the thatching rate is low, the low temperature continues after sowing, and the seed is easy to rot without emergence in the moist soil. Too much sowing or too late seedlings lead to crowded seedlings, lack of light, reduced organic nutrition, competition among plants, and the formation of weak seedlings.

5. Improper amount of sowing

Too much sowing or too late seedlings lead to crowded seedlings and lack of light, organic nutrition reduces the competition among plants, and forms weak and dead seedlings.

VI. Harm of pests

After sowing by underground pests (ground tiger grubs mole cricket. Golden needle insects, etc.) bite, resulting in dead seedlings, this situation is more serious in the soil with insufficient soil moisture.

VII. Drug damage

The use of pesticides or herbicides, more than one-fixed concentration, can form abnormal color leaf spots, buds and roots curled or thickened corn seedlings are inhibited due to drug damage.

8. Fertilizer damage

When too much nitrogen and potassium fertilizer is close to the seed during sowing, it will inhibit the seed germination and make the leaves slowly turn yellow to death.

All right, these are the main reasons for the death of corn seedlings brought by the editor of Tuliu.com. I hope it will be helpful to all of you. I'll see you next time.