Why does rice fall?

1. The roots are lodging. The so-called root lodging is when the rice is ripe, the bottom section is not folded, but the roots are separated from the soil. This is because the root system is mainly the upper root after rice jointing, which is relatively short. The amount of roots is also small. If the long-term drainage is not good, the soil will have a small fixing force to the roots, and the upper part of the plant will fall and fall. It is possible to add rooting substances (such as root mites) when applying panicle fertilizer before jointing, increase root amount and promote root length combined with drainage to solve.

2, the stem is lodging, that is, the bottom section is folded, the main reason for the stem lodging is that the closure is too early, that is, the seal is sealed before the boot. Everyone who grows rice usually thinks that the earlier the closure, the better. This is not the case. The elongation of the bottom section of the rice (between the four quarters) is also called jointing. At the same time, the two leaves are elongated and the spikelets are differentiated. The length of the bottom section has little to do with lodging. This is difficult to understand, because on the surface, the bottom section is long, the lodging is easy to occur, and the bottom section is short and the lodging resistance is good. But in fact, the root cause of stem lodging is the degree of filling of the bottom section. After jointing, the process of stretching the flag leaves is also full of the bottom section. The main photosynthetic products enriched in the bottom section are derived from the inverted four leaves (because the inverted four leaves are born at the lower end of the bottom section), the pre-fertilizer regulation is not good, and the inverted three leaves are the longest. If the density is too large, it will cover the inverted four leaves, causing the inverted four leaves to receive light, which will seriously affect the photosynthetic efficiency of the inverted four leaves, resulting in insufficient synthesis of the bottom solid material, and no lodging can be seen at this time.

When the rice ear is grouted, a large amount of photosynthetic products are needed. The main functional leaves are the flag leaf and the inverted two leaves. If it encounters cloudy and rainy, the light is insufficient, the material produced by the photosynthesis of the flag leaf and the inverted two leaves can not meet the needs of seed filling. In order to satisfy the maturity of the seed (this is the characteristic of all the progeny of the reproduction of the organism), the ready-made carbohydrates are extracted from the elongated internodes, resulting in a lack of sufficient material in the bottom section, and the weight of the upper part of the plant is increased. Carrying and lodging. The main time occurs in the late stage of milk ripening, and the degree of fullness of the bottom section is the root cause of lodging. As for the hard type of rod, it is only a supplementary factor and cannot be used as the main reason for lodging. The stalk lodging can be applied to the rice heading grouting, and the silicon fertilizer can be applied. The silicon can strengthen the stalk strength of the rice base and prevent the rice from lodging. The silicon content in the market is higher than that of the Turkish silicon, the silicon content is 72%, and the lodging resistance is relatively high. Significant.

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