Causes and solutions of stiff seedlings of rice

Rice stiff seedlings, also known as sitting seedlings, is a common phenomenon in the growth of rice seedlings, which shows that the growth of rice seedlings is slow or not long after transplanting, which seriously affects the yield and quality of rice and brings serious economic losses to farmers. So what is the cause of rigid rice seedlings? How to solve the problem? Let's take a look at the detailed introduction of the pro-agricultural network.

1. The groundwater level is too high

In the process of rice seedling growth, if transplanting rice seedlings too deep and cause rice seedlings to be submerged in deep water for a long time, or poor drainage, it will lead to soil hypoxia. Enhance reducibility, and the basal fertilizer will decompose in this case, releasing a large amount of hydrogen sulfide, resulting in rice seedling root poisoning, resulting in rigid seedlings.

Solution: timely drainage and detoxification, trenching drainage, lowering the groundwater level and removing toxic substances.

2. Excessive application of green manure

If overpressing too much or too late during fertilization, green manure will produce a large number of reducing substances in the process of decomposition, such as hydrogen sulfide, acetic acid, etc., these substances will also lead to rice seedling root poisoning and lead to rigid seedlings.

Solution: the turning and pressing of green manure is usually carried out about half a month before sowing, which can avoid the coincidence of the decomposition time of green manure and the time of rooting and growth of rice seedlings. At the same time, it is also necessary to control the amount of green manure application, generally speaking, green manure fertilization per mu should be in 1500kg, excessive application will release a large number of toxic substances during decomposition, which will be counterproductive.

3. Soil viscous weight

The land with loose and fertile soil should be selected before rice planting. If the soil is planted in the land with heavy soil viscosity, the soil grain is fine and the permeability is very poor after irrigation, it will also lead to the accumulation of oxygen or toxic substances in the soil, and lead to the phenomenon of rigid seedlings.

Solution: select the land with thick soil and loose soil before planting, turn the soil deeply before planting, strengthen the management, and should not be too deep when transplanting rice seedlings. Once the phenomenon of stiff seedlings caused by soil problems is found, it is necessary to drain and loosen the soil in time. Increase permeability and then release water.

4. Lack of trace elements

Rice seedlings may also lack some trace elements, such as zinc deficiency, potassium deficiency and phosphorus deficiency.

Solution: if you want to judge that it is caused by the lack of certain trace elements, you can prescribe the right medicine and increase some kind of fertility. When the rice is zinc deficient, the leaf tip becomes dry, the new leaves are short and narrow, the growth is slow, there is no tiller or few tillers, and the plant is dwarfed; potassium deficiency turns into growth stagnation, the leaves are dark green but few tillers, the leaves appear yellow-brown or reddish brown spots, and finally form stripes, and when the leaves are serious, the leaves die; when phosphorus deficiency is deficient, the new leaves are dark green, the lower part of the leaves are purple-red, and some of the roots are brown. As long as they are judged according to their respective characteristics, we can prescribe the right medicine to the case, and we must pay attention to the supply of nitrogen fertilizer in the growth stage of rice seedlings to prevent premature senility.

The above are the causes and solutions of rice rigid seedlings brought by the pro-agricultural network. This is the end of the introduction of rice rigid seedlings. If you want to know more about rice, please pay attention to the pro-agricultural network.