How to topdress and fight drought after ginger seeds emerge?

Ginger is a common condiment in cooking, which is suitable for growing in warm and humid places. It grows in both north and south of China and has high planting value. The following small series will talk about the management methods of ginger seedling stage.

Ginger planting requires high technology, especially the management quality from seedling stage to flourishing stage, which has great influence on the yield and quality of ginger. Improper management will lead to "braiding" of leaves, yellowing of leaves, root rot, dead trees and rotten seedlings. It is of great significance to do a good job in the management from seedling stage to vigorous growth stage to prevent and alleviate these unhealthy growth phenomena, so as to improve yield and quality and increase planting income.

First, common problems in ginger seedling stage

1, the phenomenon of leaf curling and banding appears in high temperature and drought.

2. The root system is weak and the iron deficiency is serious.

3. Rot of stem base leads to lodging and fracture of stem base.

Second, the technical points of ginger seedling management

1, shading

Ginger is a shade-tolerant plant, which is not resistant to strong light and high temperature. However, the seedling stage is in the hot summer season, with hot weather and strong sunlight. Therefore, ginger planting must be shaded.

In the southern ginger area, a "ginger shed" was used to shade the area. The specific method is to build a shed on the edge with bamboo poles after it is unearthed at the seedling stage, and then cover it with straw for shade. However, the traditional shading method in northern ginger areas is "inserting Jiang Cao". Usually, after sowing ginger, when the soil is wet, straw is inserted at about 15cm on the south side (east-west direction) or west side (north-south direction) of the planting line to weave a fence to shade the sun, or corn straw can be used instead. At present, materials such as sunshade net are gradually used to shade ginger, and the effect is good.

2, reasonable watering

Ginger root system is shallow, mainly distributed in the surface layer of soil, which is not drought-tolerant and needs to be watered frequently. However, ginger is not tolerant to waterlogging. If you water too much, it will affect the root development of ginger and cause diseases such as ginger blast. Therefore, reasonable watering is very important.

Ginger seedlings are small and require less water. However, due to the underdeveloped root system and poor water absorption capacity, it is necessary to irrigate frequently with small water and cultivate in time to maintain soil moisture. In summer, when the temperature rises and droughts occur frequently, it is necessary to replenish water in time and water it every 5-7 days. Watering time should be in the morning and evening, and drainage should be done in time after heavy rain or rainstorm.

Ginger root system is shallow, mainly distributed in the surface layer of soil, which is not drought-tolerant and needs to be watered frequently. However, ginger is not tolerant to waterlogging. If you water too much, it will affect the root development of ginger and cause diseases such as ginger blast. Therefore, reasonable watering is very important.

Jiang Miao has small plants and low water demand. However, due to the underdeveloped root system and poor water absorption capacity, it is necessary to irrigate with less water, cultivate in time and preserve moisture. In summer, when the temperature rises and droughts occur frequently, it is necessary to replenish water in time and water it every 5-7 days. Watering time should be in the morning and evening, and drainage should be done in time after heavy rain or rainstorm.

3. Rational fertilization

In order to make Jiang Miao grow healthily, the first topdressing is usually carried out when the seedling height is about 20-30cm and there are 1-2 small branches, which is called "small topdressing" or "strong seedling fertilizer". At this time, trace element water-soluble fertilizer can be used for washing to supplement the nutrients needed by Jiang Miao and promote the growth of stems and leaves. In addition, ginger is prone to iron deficiency and yellowing at seedling stage, which can be prevented by spraying trace element water-soluble fertilizer on leaves.

4. Promote roots and strengthen seedlings

The root system of ginger is weak in absorbing nutrients, so taking appropriate measures to promote roots at seedling stage can improve root activity and improve root system's ability to absorb nutrients and water. Plant growth regulator +0. 1.0% triacontanol+hymexazol can be sprayed on leaves with seedling height 1.5-20 cm to promote root growth, prevent root diseases and promote plant growth and health.

5, intertillage weeding

Ginger is a shallow root crop, so it is not suitable for deep ploughing. In actual production, ginger cultivated with plastic film does not need intertillage before uncovering the film; Generally, ginger cultivated in the open field should be combined with watering or shallow intertillage 1-2 times after emergence. At this time, the seedling height is about 1-30cm, and the intertillage depth is kept at 5-8cm, so as to prevent soil hardening, raise ground temperature and eliminate weeds.

6, pest control

The main diseases of ginger at seedling stage are ginger blast, stem rot and anthracnose. For ginger blast, Guoguang Zheng Sheng+hymexazol+octylamine can be used to control it before or at the initial stage, but it is difficult to control it in the later stage. For stem rot, metalaxyl-manganese-zinc+octylamine+hymexazol+growth regulator can be used to control it before or at the beginning of the disease. For anthrax, Guoguang Biaojian spray can be used to control it. The main pests at seedling stage are thrips and ginger borer. For ginger borer, it can be controlled by Guoguang poison arrow, and for thrips, it can be controlled by gnat forest.