Why do peanut leaves turn yellow? An analysis of the latest causes
The peanut is a common food crop in our country and also one of our country's main oil crops. It has a very wide planting area in our country. Peanut cultivation techniques are simple and the yield is relatively high, so it is favored by many growers. However, many people, when planting peanuts, often see the phenomenon of yellow peanut leaves, which affects the normal growth of peanuts. So why do peanut leaves turn yellow? Now let's take a look together with the editor!
1. Yellowing of peanuts at the field edge
In many cases, yellow peanut leaves mainly appear at the field edge. The main reason for the yellowing of peanuts at the field edge is still that when large machinery such as harvesters and seeders is working, the positions they run over show relatively severe yellowing. This is because after the soil is compacted, it becomes relatively hard and firm, the soil permeability becomes poor, and the roots can only carry out anaerobic respiration. Add to that high temperatures, and the evaporation of the peanuts is also high; with insufficient nutrition and an inability to absorb nutrients, yellow leaves result. Therefore, we should pay attention to doing a good job of intertillage and loosening the soil, improving soil permeability, and letting the roots develop normally.
2. Yellowing of individual seedlings
Besides yellowing at the field edge, peanuts are also prone to the phenomenon of individual seedlings turning yellow. This may be caused by relatively poor peanut seed quality, which leads to weak seedling growth and a susceptibility to nutrient deficiency. Moreover, many growers generally save their own seed, and the seed has relatively high moisture content during storage, so after sowing it is even more likely to develop yellow leaves, and in severe cases it can also cause seed rot. Or it may also be caused by sowing too deep, which usually occurs with peanuts planted after wheat stubble. Therefore, we should not only select high-quality improved peanut varieties and maintain a dry storage environment. When sowing, we must also control the sowing depth well, and it must not be too deep.
3. Too much water
When watering peanuts, many growers like flood irrigation. If there is too much water, it will reduce soil permeability, lead to insufficient oxygen, and the soil temperature will also drop sharply as a result. The roots basically cannot breathe, thereby affecting the peanut's nutrient absorption. This leads to the loss of nutrients in the soil, or the soil becoming waterlogged because drainage was not carried out in time after heavy rain. Especially in low-lying plots, too much water can very easily cause the soil to become waterlogged. This causes large-scale yellowing of peanut leaves, so everyone must be sure to control the amount of watering well and not water too much, so as to ensure the normal growth of peanuts.
4. Physiological nutrient deficiency
The situations just mentioned above, such as high soil moisture and soil hardening, will all inhibit the peanut's nutrient absorption. This causes peanut plants to develop yellow leaves, turn white, and in severe cases can lead to seedling death. Therefore, we should pay attention to doing a good job of nutrient supplementation to meet the nutritional needs of peanut plants. If a single fertilizer is applied excessively, the peanuts will develop yellow leaves due to nutrient deficiency. This is especially true for high-nitrogen fertilizer: the more high-nitrogen fertilizer is applied, the more severe the yellowing of peanut leaves will be. At the same time, a lack of trace elements such as iron, zinc, and sulfur will also worsen the yellowing phenomenon.
The above is a brief introduction to why peanut leaves turn yellow. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!