What is the reason why the rice seedlings are white and a little yellow?

What happens when rice seedlings appear yellow tips and a small number of white seedlings appear? This phenomenon can be caused by a variety of reasons.

First, the cold wave cooled down at the rice seedling stage, resulting in yellow tips of the seedlings. During the period of rice seedling raising, the cold air activity is frequent, and the decrease and temperature rise occur frequently, and the strong and young seedlings are difficult to withstand the stimulation of low temperature, resulting in yellowing of leaf tips. This is a symptom of the physiological function of rice seedlings to resist cold wave and cool down.

By keeping warm, increasing the temperature and naturally warming up, the phenomenon of yellow tips in rice disappears naturally. In addition, rice seedlings raising, whether it is a greenhouse or a small arch shed, try to avoid ventilation in the low temperature section, so that the seedlings are further stimulated by cooling, which is also an important reason for the yellow tip of rice seedlings.

Second, insect pests such as thrips occur at the rice seedling stage, resulting in yellow tips of seedlings. During the rice seedling raising period, it is the time when the spring flowers are blooming, the temperature is rising, and it is also the time for the overwintering insect eggs to hatch. After the hatching of the eggs of the overwintering insects in the seedling field, the larvae first begin to damage the leaf tips of the seedlings, such as rice thrips and the first generation of various borers, so that the leaf tips of the seedlings are wrapped, and the larvae hide in them, attracting nutrients from the leaf tips and causing yellowing of the leaf tips of rice.

The solution is that you can use an appropriate amount of deltamethrin, imidacloprid, thiamethoxam and other agents to prevent and control, and it will soon return to normal.

Thirdly, the phenomenon of defertilization occurred at the seedling stage of rice, resulting in the yellow tip of the seedlings. The root system of rice seedlings is normal, and there are no diseases and pests, the bottom leaves are yellow, and the leaf tips are yellow, which is a symptom of defertilization. The reason is that before sowing, the amount of basal fertilizer is too small, or there is too much fast-acting fertilizer, too little or missing organic fertilizer, the seedling growth state is not good, the plant is short, and the overall light yellow is not thick green, resulting in the seedling stage due to the lack of nitrogen fertilizer and the bottom leaves are yellow and yellow, and the leaf tips are yellow.

The solution is to apply seedling fertilizer to the seedlings, and it is recommended to use trim water-soluble fertilizer.

Fourth, during the rice seedling raising period, due to improper fertilization and spraying, resulting in fertilizer damage. When fertilizing, the seedbed is too dry, there is no watering, the seedlings burn the roots, and the yellow tips of the seedlings appear. If the concentration of insecticides is too large, the seedlings will be damaged, and the phenomenon of yellow leaves and yellow tips will appear.

The emergence of these phenomena is that the seedlings have poor resistance, and after a period of growth process, they will naturally return to normal.

In short, during the period of rice seedling raising, the phenomenon of yellow tips in seedlings is caused by a variety of reasons, which can be solved by analyzing the symptoms, finding out the causes, and prescribing the right medicine. The main reason for the yellow tip of the seedlings is that the seedlings have poor resistance and are very intolerant to the stimulation and defertilization of the external environment.

There are many causes of albinism in rice seedlings. It may be that the temperature is low and the rice roots do not grow. Drain water to raise the temperature of the soil, whether the soil is acidic loess or alkaline soil, sandy soil. Acidic soils can be fertilized with urea and potassium. Foliar spraying of ferrous sulfate on alkaline soil sandy soils.

The poor quality of land preparation in the seedling field is mainly manifested in the fact that there are many lying walls, large and hard blocks, and the furrow surface cannot be leveled and fine, and the mountain silt area is more obvious. After the seedlings emerge, the growth of the root system is hindered, the downward extension is slow, which affects the nutrient absorption, the seedlings grow slowly, and the seedlings will be thin and yellow in the case of nutrient deficiency for a long time.

In particular, it is easy to cause the seedbed to be soiled or prepared with nutrient soil. Generally, it will occur after the seedling leaf stage, and the symptoms such as yellowing of seedlings and dry leaf tips are basically common.

When the field temperature is too high or too low, the humidity is too high or the water is insufficient, it can also lead to malnutrition, resulting in yellowing, dry tips, or whitening, browning of the leaves, and the disease will spread downward.

Foliar fertilizer supplementation, pest control, if the concentration is too large, or spraying unevenly, or the seedlings are not washed in time after spraying, it is easy to cause leaf burns. There is a phenomenon of greening and yellowing, or the leaf tip is dry.

For example, too much organic acid, it will cause field poisoning, the main symptom is not new roots, and the epidermis will also fall off, from the outside is the leaf color yellow, serious direct death, in this case, generally hurry up to drain the field, can also sprinkle quicklime for neutralization, reduce the toxicity of organic acids.

According to the different conditions of rice seedlings, the corresponding required nutrients are supplemented, so as to enhance their resistance. You can use about 1 kg of Nopfon, 1500 times with water, and spray foliar sprays every 10 days or so.

Actively control pests and diseases, and rice seedlings quickly resume growth. For example, rice cotton rot is evenly sprayed with 1000 times of 25% methamanine wettable powder or 700 times of 65% dixone wettable powder or 1000 times of copper sulfate per mu.

Why are rice seedlings generally yellowing? Rice seedlings, on the whole, are good. However, the color of the seedlings is generally yellow.

Rice farmers have taken many adjustment measures, and some seedbeds are not very effective. Some seedbeds have also chased ammonium sulfate, sprayed foliar fertilizer, the color of rice seedlings just can't change, rice seedlings are not green, leaves or leaf tips are yellow. Rice seedlings with severe yellowing grow slowly.

Some rice seedlings still have growth stagnation. Although there are many reasons for the yellowing of rice seedlings, the main reason for the yellowing of rice seedlings this year is the climate. Because during this year's rice seedling raising period, there have been many low temperatures in various parts of the province.

In particular, the temperature at night is too low, which has a great impact on rice seedlings. In some areas, there has also been a phenomenon of frozen seedlings. In the cold-damaged rice seedlings, the leaf tissue slowly dies.

The leaf tips or leaves turn black-brown. Some of the leaves of rice seedlings with severe cold damage or frost damage have turned into white dry tips, and the rice seedlings with root damage have become cold damage type bacterial wilt. Some rice seedlings are damaged by their roots and leaves, which are not good for nutrient absorption and transformation.

Moreover, this spring has more sunlight, the temperature of the shed is easy to be super high during the day, and the growth and metabolism of rhizomes and leaves are relatively vigorous. The root system is damaged at night, the root system has poor ability to absorb fertilizer and water, and the nutrients are insufficient. Rice seedlings showed a lack of nutrients.

However, due to the high temperature during the day, it is necessary to maintain the growth of the heart leaves, and the nutrients in the leaves of rice seedlings will be transferred to the heart leaves, and the growth of the heart leaves will be maintained, and the leaves will show symptoms of nutrient deficiency. Coupled with frost-damaged leaf damage, some rice seedling leaves were also infected with bacteria. Some leaves show red tips, while others show yellow tips.

So how does cold injury and high temperature cause rice leaves to turn yellow? The humidity is high, the moisture is large, the seedlings are long, the root system is poorly developed, and the rice seedlings are rapidly yellowed after the cold injury. Due to the high humidity and moisture of the seedbed, the temperature is high during the day, and the rice seedlings have long stems and leaves.

The root system is not well developed. The water content of roots, stems and leaves is large, the plant tissue is tender, and the rice seedlings are not resistant to cold damage. After the low temperature, the greenhouse temperature rises rapidly during the day, the transpiration of the leaves is large, the root system can not quickly recover the absorption function, the leaves show wilt, and the rice seedlings become cold-damaged bacterial wilt.

Since plants have the ability to prioritize nutrients, when nutrients are insufficient, nutrients will concentrate on the heart leaves, and some of the nutrients in the leaves will also be transferred to the heart leaves. In addition, after the seedling tissue is damaged, it has its own function of repairing the damaged tissue, and part of the nutrients flow back to the root system and repair the damaged root system. Causes dystrophic leaves that manifest themselves as leaf tips or yellowing of leaves.

In your case, you should be fertilizing a little too much.

The common causes of yellowing of rice seedlings include toxic yellowing, nutrient deficiency, fertilizer or pesticide damage, disease infection and physiological premature aging of yellow leaves. During the growth period of rice seedlings, the leaves are relatively young and tender, the stress resistance and disease resistance are relatively poor, and the weather is changeable, and the problems of yellow leaves and dry tips of the seedlings will occur if the management is not appropriate.

<> rice seedlings turn yellow, there is still salvation. Lack of nutrients, fertilizer or pesticide damage, disease infection, insect pests, plant poisoning, etc. are all causes of yellowing of rice seedlings. Nitrogen deficiency requires timely topdressing of available nitrogen fertilizers such as urea and closed-skin ammonium bicarbonate; potassium deficiency and timely topdressing of potassium fertilizer; Zinc deficiency can be remedied with chelate zinc foliar sprays; In the event of fertilizer damage or pesticide damage, it can be sprayed on the foliar surface to judge the defeat state; Yellow dwarf, verticillium wilt and other diseases are sprayed with isoprocarb, altaylin mixture or ningnanmycin and Bihu Chagai mixture for prevention and control.

Summary. Hello dear! The yellowing of rice seedlings may be caused by insufficient nutrients in the soil, or the soil is too moist and lacks oxygen.

It can also be caused by problems such as pests and diseases. Further observation and analysis are needed to find out the root cause of the problem. If it is caused by insufficient nutrients, fertilizers can be added appropriately; If it is due to the soil being too wet, drainage measures can be strengthened; If it is due to problems such as pests and diseases, corresponding control measures can be taken.

Hello dear! The yellowing of rice seedlings may be caused by insufficient nutrients in the soil, or the soil is too moist and lacks oxygen. It can also be caused by problems such as pests and diseases.

Further observation and analysis of failures are needed to find out the root cause of the problem. If it is caused by insufficient nutrients, fertilizers can be added appropriately; If the soil is too wet, it can be transported to enhance drainage measures; If it is due to problems such as pests and diseases, corresponding prevention and control measures can be taken.

Hello experts, my rice seedlings are yellow, and I will water them twice a day, is it caused by overwatering.

Yes dear. Overwatering.

Hello Zhiyunyou, the yellowing of rice seedlings may be caused by overwatering. Rice needs a certain amount of water to grow, but overwatering will cause soil hypoxia, affect the normal respiration of rice roots, and thus affect nutrient uptake and growth and development. Therefore, you can appropriately reduce the frequency and amount of watering and keep the soil moist but not over-moist.

At the same time, you can also check whether the soil is well drained, and if the drainage is poor, you can take measures to improve it in time. In addition, if there is a lack of nutrients in the soil, it will also cause the rice to turn yellow, so you can consider adding an appropriate amount of fertilizer to promote the normal growth and development of locust rice.

Add a little fertilizer pro.

Okay specialist, add fertilizer I remembered, then I watered twice a day is not to reduce it.

Yes pro, it needs to be reduced.

Do not overwater.

Rice is a common crop in life, especially in the southern region, it is a wheat field that can be seen everywhere, but many people encounter the problem of rice yellowing and not growing when planting rice, so what happens if the rice is yellow and does not grow? How to remedy the yellowing and shrinking of rice? The answer is here.

Rice is a common crop in life, and if it turns yellow and shears during the planting process, it may be infected with yellowing and atrophy. Rice yellowing and atrophy disease, also known as downy mildew, is a fungal disease, if the rice encounters flooding, cold air invasion and other environmental changes during the growth process, the resistance of rice will be weakened, so as to suffer from yellowing and atrophy.

Rice yellowing and shrinkage is mostly because of yellowing and atrophy disease, like this to remedy we should focus on disease prevention, prevention and control as a supplement, but once the onset of the disease, timely drug prevention and control, specific can be used, by the imitation of the disease is different, the choice of medicine will also be different, according to the severity of the local disease, the purchase of fungicides.

In the process of planting, if rice encounters extreme weather or flooding, its resistance will be reduced, and it is prone to yellowing and atrophy. In order to prevent disease, it is also recommended that you can spray carbendazim or tobuzin for prevention and control, and rice should increase its phosphorus and potassium fertilizer and Tongwu seedling booster to improve its resistance in daily maintenance.