What is the reason why the rate of rice heading is not high when it is about to enter harvest stage?

The direct impact of low panicle rate of rice is the decline of rice yield, and there are many reasons for the low panicle rate of rice. Here, I will analyze it with you.

First of all, let's take a look at what is the panicle rate of rice?

The panicle rate of rice refers to the number of tillers in which the number of effective panicles accounts for the peak tillering period of rice, that is, the panicle rate of rice. To put it simply, the panicle of rice can be planted, not shrivelled, which accounts for the proportion of all panicles. There are many reasons why the panicle rate of rice is not high. Here is a brief analysis.

From the calculation method of panicle rate, we can see that the main reason for the low panicle rate is that there are too many invalid tillers in rice.

What is the reason for ineffective excessive tillering?

First of all, ineffective tillers are those rice tillers that cannot heading normally or whose seed setting rate is too low. There are many factors affecting tillering, nutrition, light, water and so on will affect the tillering of rice. During the rice seedling period, due to the excessive planting density and insufficient nutrition supply of rice seedlings, the tiller buds of rice seedlings are dormant, which have a great impact on the growth of rice in the later stage, and it is easy to cause the incomplete development of tillers in the later stage of rice. This leads to the increase of ineffective tillers in rice.

The unsuitable temperature in the tillering period of rice will also affect the effective tillering of rice. The most suitable temperature for rice at tillering stage is about 30 degrees to 32 degrees. Sufficient light is also beneficial to the tillering of rice. If rice turns green and suffers long-term overcast and rainy weather, rice tillering will be affected. In addition, paddy fields with sufficient water and adequate nutrition will naturally be better, and the ineffective tillers will naturally be less.

Another reason for the low panicle rate of rice is the large number of ineffective panicles, that is, most of the ineffective panicles of rice are less than 10 grains, or empty grains and too many shriveled panicles. The reason for the large number of ineffective panicles in rice is mainly caused by the excessive application of nitrogen fertilizer.

Excessive application of nitrogen fertilizer will cause overgrowth of rice, but the root growth is not ideal. In the later stage, the nutrition supply of rice is insufficient, resulting in the formation of empty grains of rice. Excessive use of nitrogen fertilizer will lead to lodging in rice.

Finally, let's talk about how to improve the panicle rate of rice.

First of all, in the stage of raising rice seedlings, sufficient fertilizer must be ensured and strong seedlings must be raised. Secondly, according to the characteristics of different rice varieties, reasonable close planting to ensure the normal growth of rice nutrients, water and light, adequate nutrient supply, normal tillering. In addition, rational fertilization should not only pay attention to the base fertilizer, but also pay more attention to the fertilization in the later stage of rice growth, increase the application of panicle fertilizer and promote rice tillering into panicle.

Here is science to promote agriculture, welcome to add attention, with you to grow knowledge.