The phenomenon of uneven maize emergence often occurs in production practices. Due to uneven emergence, resulting in a decrease in the density of corn, which directly affect the yield of corn, the main reasons for the emergence of corn seedlings are the following:
1, extensive farmland quality
The depth of arable land is different, the plough layer is shallow, soil lumps are of different sizes, and the site preparation is uneven and uneven. After sowing of the corn, the seeds with less water in the soil and pressed by larger lumps are slow to emerge, and are difficult to emerge.
2, corn seed quality is not high
The difference in corn seed itself affects the emergence of incomplete seedlings. First, corn seeds are exposed to rain during the harvest and have high moisture content, which may cause mildew and lower the seed germination rate. Second, the difference between coated and non-coated seeds, non-coating Seed emergence is fast, but the rate of seedling formation is low. Seed emergence is slow but the rate of seedling formation is high. Third, seeds are mechanically damaged in the processes of threshing, picking, transportation and coating, etc. The seed germination rate is low, and the rate of emergence is low. .
3, the sowing quality is not high
Different seeding depths and inconsistencies in covering with different thicknesses of the soil, slow seeding and thick seedlings appear to be slow, and seedlings in the shallow seeding soil cover are fast. However, seeds that are sown in shallow soils are prone to germination by rain, direct sunlight, and difficulty in germination, which directly affects seedling emergence.
4, the influence of bad weather factors
Encountered in dry weather, soil moisture is insufficient, often drought-resistant sowing, affecting the quality of maize seedlings; again encounter long-term soil moisture is too full, corn seed easily lead to rotten bud dead seedlings and so on.
5, the harm of pests
In particular, uncoated seeds are most likely to cause endangered pests and diseases, resulting in uneven emergence of corn.
The main preventive measures to prevent the emergence of corn seedlings are:
1, intensive cultivation, land formation
Deep plowing of the land before sowing is consistent in depth and depth. The target is flat and fine, and there are no large lumps and evenness.
2, improve the sowing quality
Select good disease-resistant varieties and promote the use of coated seeds; the depth of the seeding should be the same when planting so as to avoid overlying or overlying the soil, and the cover should be kept as uniform as possible.
3, control pests
The best way to control rodents and pests is to use coated seeds because the coated seeds contain insecticides, fungicides, and plant growth regulators.
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Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizon.com