The higher the plant height of corn, the worse the resistance to lodging is the most serious mistake! So what are the main reasons for corn lodging? Let's take a look at how agricultural experts are doing it!
There is a look at the corn
At first glance, the root system is underdeveloped.
The developed roots have strong resistance to lodging, and on the contrary, they have poor resistance to lodging;
Second, look at the length of the stem base.
The shorter the internode of the stem, the stronger the resistance to lodging, on the contrary, the worse the resistance to lodging;
Third, look at the hardness and toughness of the stalk.
It can't be seen with our naked eyes. The method is simple. When the corn grows to the middle and late stages, the corn stalk is slowly pulled to 45 degrees by hand, and the hand is taken away. The straw immediately bounces back, which proves that the hardness and toughness are good. This variety has strong resistance to lodging, on the contrary, poor resistance to lodging;
Fourth, do not look at the height of the plant height, depending on the level of the ear position.
Corn knowledge: There is a ratio between plant height and ear position. It is called “three to oneâ€, that is, the plant height of three meters. The ear position is on one meter. It is not said that the resistance is very strong; of course, the plant height is three meters and the ear position One meter, five, one meter, is there a problem? I tell you that there is no problem at all; then the ear is one meter two or even high, it will not work, that is, not only the plant height is high, but also the ear position. It is also high, and the anti-reverse energy can be understood as poor.
The main reason for corn lodging
In addition to the high density is the main reason for lodging, the lodging weight is also affected by seven factors (ie, sowing depth, estuary, ecological environment, how long the fertilization is strong, different types of fertilizer, depth of arable land, soil texture, etc.);
In addition, there is another factor, that is, during the jointing stage of corn, the big water and big fat attack once, it is also easy to cause the lodging of the late corn; the reason is: the corn jointing stage is the most vigorous period of corn vegetative growth, when the big water and big fertilizer One attack is easy to form vegetative growth and reproductive growth disorders, that is, light is long, and internal tassel ear differentiation is affected. Finally, two problems are easy to occur. First, it is prone to empty trees; second, due to inter-section elongation, The increase in plant height causes hidden dangers for late lodging.
First of all, it is clear that corn is a high-crop crop, and it is very easy to fall in the face of extreme storms. Of course, the resistance to lodging of different varieties is different, which is related to the differences in traits of each variety. For example, some varieties have weak seedlings in the early stage, and the root system is underdeveloped. Later, the roots of corn are gradually improved, so the early stage is easy to fall, and the late lodging resistance is enhanced. Some high-yielding corn varieties (no yield without yield) have the disadvantage that the plant height is particularly high, the height of the ear is not low, and the risk of lodging is highly prone.
Here to rule out the impact of the corn variety factors on the lodging, just want to talk about planting the same corn varieties, in the case of the same extreme weather, why are some lodgings serious, a little no lodging at all? This situation is not a few phenomena, it is not uncommon.
"Three minutes, seven points" is the key
Please take care to prevent the following error management:
Planting density is too large
Unreasonable fertilization, partial application of nitrogen fertilizer
Ignore chemical control
Inadequate field management, serious pests and diseases
Improper use of post-emergence corn herbicides, uneven distribution of extreme weather in summer
Finally, there are three main reasons for corn lodging: high density, deep sowing, and the third is the large-scale heavy fertilizer attack during the jointing period, and the relationship with plant height is not or small.
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