The harm of Sesame drought and its Preventive measures

Sesame is one of the most important grain and oil crops in China, which is planted all over the country, but a variety of problems often occur in the planting process, which seriously affect the planting efficiency of farmers. Today, the editor has summarized the harm, diagnosis and preventive measures of the sesame drought in detail. Let's take a look at it.

1. Drought hazards

Drought in the sowing period of sesame will cause the seeds to fail to emerge, and even if they do, it will also cause problems such as uneven emergence or poor growth at the seedling stage. Persistent drought during the growth period will often cause sesame growth retardation, leaf yellowing and shedding, premature senescence in the later stage, and great harm. In flowering drought, it will cause flowering and fruiting capsule reduction, bud shedding, plant dwarfing, yield reduction, quality decline and so on. Generally, drought can reduce yield by 10%, pay attention to 30%, and yield reduction in severe drought can reach more than 50%.

2. Diagnosis

When the soil moisture is less than 50% of the field capacity or less than 16% of the soil water content, the plant will appear temporary withering phenomenon, which needs timely watering. The degree of leaf wilting varies depending on the duration of the drought. If there is no rain in a long drought, whether there is a good irrigation condition is to record the climate and the time of dry fireworks. At the same time, the percentage of plant wilting and the percentage of plant recovery after relieving drought were investigated at 1-3 p.m., and recorded according to the degree of plant wilting.

3. Preventive measures

First of all, it is necessary to establish a sound irrigation and water conservancy guarantee system, which can realize drought energy irrigation, waterlogging energy drainage and water logging energy reduction, and develop water-saving irrigation technologies such as drip irrigation or sprinkler irrigation according to the local actual situation. The varieties with strong drought tolerance should be planted at present. Generally, the drought tolerance of single stem type varieties is stronger than that of branch type varieties, and the drought tolerance of those with less antler pieces is stronger than that of those with more antler pieces. Sesame taboo continuous cropping, so more attention should be paid to land selection. It is best to select plots with good fertilizer and water conditions and planted sesame seeds for more than three years. In areas where drought occurs frequently and lasts for a long time, the soil preparation measures of turning the land in autumn and raking in spring can be taken to sow and sow at the right time to reduce the impact of drought. In the cultivation of seedlings, it is necessary to strengthen the management of seedling stage, and time seedlings to cultivate strong seedlings. In field cultivation, once there are signs of drought, shallow ploughing as soon as possible, inter-row covered with straw, plastic film and other drought-resistant mulch to reduce water evaporation.

The above is the introduction of the harm and preventive measures of sesame drought. I hope it can help you. If you want to know more about it, please follow us.