There are four reasons for rice lodging:

1. Breed related

Some varieties are more lodging resistant, while others are not.

2. Planting density related

Planting density is higher than the density required by planting varieties, which will make rice root grow too shallow and prone to lodging.

3. Improper management of water and fertilizer

Rice requires 2 to 3 cm of water in the seedling stage. After tillering, it is necessary to field drying. If the field drying is not done well, it is also easy to make rice lodging. Excessive use of nitrogenous fertilizer, inadequate use of phosphorus and potash, uneven use of fertilizer, most of the lodging is due to the use of urea too much.

4. Plant diseases and insect pests

Diseases and insect pests did not control well and caused serious damage to rice lodging. Especially rice planthopper, drill, sheath blight.

Methods

1. Choose lodging resistant varieties. If it is a new variety that has not been planted before, it is better to try to plant a small area for one year, with good performance, and then plant a large area the next year.

2. The planting density should be in line with the density required by the variety.Too much density, poor ventilation, shallow root system, few grains per ear.

3. Do a good job of water and fertilizer management, tillering completed, the sun good field. 15 kg of urea per mu is sufficient for the whole growing period.Main balanced fertilization.

4. Strict control of diseases and insect pests, single rice and late rice generally to play four times medicine, medicine to be careful, an mu of land had better use medicine 30 kg -45 kg (2-3 sprayer water, a pot of water to play an acre of land) to finish medicine, the field to irrigate 2-3 cm, keep about 3 days.