The latest control measures of rice lodging

Types of lodging in rice

1. Root down

Due to poor root development, shallow and unstable roots, lack of support, and slightly eroded by wind and rain, lodging occurs on the ground.

2. Stem fall

As the stem is not strong, can not afford the upper weight, resulting in varying degrees of lodging.

The cause of Rice lodging

1. Varieties are not resistant to lodging.

The varieties with short internodes, stout stems, erect leaves, short sword leaves and well-developed roots are not easy to lodge, otherwise they are lodging varieties. Planting lodging varieties is the key to prevent lodging of rice.

2. Planting density is unreasonable.

Too many planting holes per mu or too many seedlings per hole seriously affect the ventilation and light transmittance of rice, resulting in poor root growth, weak plant growth and basal Internode growth, which is easy to lead to lodging.

3. Fertilizer and water management is not in place.

One-sided heavy application of nitrogen fertilizer led to overgrowth of plants, premature jointing and excessive leaf area at panicle stage, resulting in lodging; long-term deep irrigation resulted in excessive growth of basal internodes of stem, early death of lower leaves and poor root development and lodging.

4. Diseases and insect pests

The control of diseases and insect pests is not timely, the stem tissue is destroyed, and it is easy to cause lodging.

Prevention and cure measures

1. Select fertilizer-resistant and lodging-resistant varieties

For example, fertilizer-tolerant varieties with semi-dwarf, thick stem, developed root system and erect leaves are selected.

2. Strengthen the management of water and fertilizer

Appropriate application of nitrogen fertilizer, reasonable application of phosphorus and potassium fertilizer, a small amount of silicon fertilizer and other micro-fertilizer; shallow water irrigation, in each growth stage of rice, the method of shallow wet intermittent irrigation should be carried out, the water layer can be properly deepened at booting stage, and the shallow water layer should be kept after heading.

3. Reasonable close planting

The construction of a reasonable population structure can prevent excessive population density, good ventilation and light transmission, strong stem and leaf tissue, enhance resistance to diseases and insect pests, and enhance stem lodging resistance.

4. Sun up the field at the right time

Drying the field is an important measure to prevent rice from lodging. Therefore, drainage and drying should be carried out at the end of tillering stage to control ineffective tillering, improve soil environment, enhance root activity, and make rice seedlings grow healthily and steadily.

5. timely prevention and control of diseases and insect pests

Protect the lodging resistance of the stem from being damaged by diseases and insect pests or try to reduce the damage degree of the stem.