Is it better to plant corn sparsely or densely?

Abstract: should corn be planted with "high density" or sparsely planted?

Now it is the autumn harvest season, and the corn has entered the harvest season one after another. The problem of close planting of corn is actually a concern of many farmers. I have seen before that it is said that corn must be closely planted if it wants to have a high yield. But here I personally think that the same sentence must be taken in accordance with local conditions!

What kind of corn planting density is more reasonable?

The first thing to understand is that the planting density of corn is restricted by many factors, if you do not understand clearly, blindly pursue high-density planting, it is likely to be counterproductive.

The variety problem is a major factor affecting the planting density. There are various varieties of corn, and the density adaptability of corn is also different. Generally speaking, the density tolerance of the compact hybrid is better, while the density tolerance of the flat type is worse than that of the compact type.

Specifically, the vertical leaf type precocious maize variety, this kind of corn has good density tolerance, the vertical leaf type corn leaves grow upward, and the plant type is compact. Generally, about 4500 plants are planted per mu. Flat late-maturing maize variety, this kind of corn variety has poor density tolerance. Generally, about 3200 plants are planted per mu, because the plant type of this variety is relatively high, the leaf is wide, and the angle between the ear position and the main stem is relatively large. In addition, there are maize varieties between the two, which are relatively moderate in density tolerance, generally planting about 3500 plants.

In addition to the problems of varieties, the water and fertilizer conditions of the land also need to be considered, such as the northwest region, because the irrigation problem is relatively poor and the precipitation is less than the price, most of the areas affected by corn growth belong to dry corn areas. the water conditions in this region are difficult to meet the growth needs of corn, so it is more suitable for sparse planting corn to avoid poor growth as a whole.

The maize planting density in the south, southwest and south of Huang-Huai is not very high, mainly because the precipitation in these areas is opposite to that in the northwest, and the precipitation in these areas is high. Rain Water is also not conducive to the growth of maize, especially too much Rain Water in the seedling stage will affect the growth of maize seedlings, which is not conducive to seedling growth. There are too many Rain Water in the middle period of corn growth, which is easy to cause overgrowth, lodging and so on. So this part of the area is not suitable for close planting of corn.

Northeast China and Huang-Huai Plain are the main producing areas of maize planting in China, where moderate precipitation, good irrigation conditions and good corn growth are suitable for close planting.

In addition, the study found that heat is also a major problem affecting corn planting density, and heat conditions will affect the growth of corn, so for the areas with poor heat conditions in Northeast China, planting can be properly improved because of poor heat conditions in this area. increase the heat storage between corn, appropriate close planting is beneficial to the growth of corn in these areas.

In addition, the yield of corn plots is also a factor affecting planting density, and the planting density of middle-yield plots can be reduced appropriately. About 3000 plants are generally planted for flat-type corn varieties and about 4000 plants for compact corn varieties.

For the middle and high yield plots, the yield of corn per mu can reach 1000 to 1200 jin, and the planting density of corn can be increased appropriately. For high-yield plots, the yield per mu is higher, reaching more than 1300 jin, and the planting density of corn in these plots is more dense. Therefore, we still need to choose corn planting density according to local conditions, not blindly pursue close planting.

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