Agricultural experts "sun" anti -drought "treasure" | Oilflower: combined with irrigation and topdressing, timely to remove branches

Editor's note: Since early July, Hunan Province has continued to be high -temperature and hot in Hunan Province, and has issued a red warning of temperature many times. For crops, high temperature and drought will destroy its growth environment and affect generating efficiency. Helping crops can effectively respond to high temperature and drought and strive for high yield and stable production, which has become an emergency. To this end, the reporter invited many experts from the Hunan Academy of Agricultural Sciences to share with you the "treasure" of drought resistance.

At present, Xiayoukui is sown during the flowering period and okra. The high temperature of the drought will extend the time and reduce the seedling rate of autumn oil, which will lead to the lack of seedlings. Caused the increase in empty grains, small flowers, and low weight, which eventually led to reduced production. In response to these issues, Researchers He Luqiu gave specific suggestions at the Hunan Academy of Agricultural Sciences.

First, it is necessary to irrigate in time to prevent drought and seedlings.

Oil -fed seeds need to absorb water with a weight of 56 % of the seeds itself. Therefore, after sowing, ok okra must be irrigated in time to divert water into the ditch. Among them, the infiltration irrigation has the effect of reducing the plates without scouring, reducing evaporation and good breathability, and saving water. You can use infiltration irrigation to keep the vocal gap with water flow, while the van surface has no bright water, so that the water penetrates into the soil in the cultivation layer and improves the irrigation rate.

The oil -buds are the most required to flowering. It is a critical period for the development of flower plates and the formation of flower organs. Drought irrigation can not only increase its yield and seed oil content, but also increase the utilization rate of fertilizers and promote the large seeds of the plate.

Specifically, summer oil can be sprayed with influential irrigation and leaf surface. The leaf surface water spraying can fully play the absorption of roots, stems, and leaves, and can also make the crown layer cool down, humidify and improve the climate, promote pollen development, improve the pollination rate, and increase production effects less than ditch irrigation. However, it should be noted that spray irrigation should be selected after 5 pm.

Second, according to the growth, to remove the branches.

Oilflowers often have branches, commonly known as "division", mainly due to abnormal climate conditions. Once the branches are found during the growth of oilflowers, the branches will be removed immediately, which can reduce the consumption of water and nutrients, especially during the drought period to ensure the demand for nutrients and moisture in the main stem flower plate. In terms of specific operations, the large nutrient branches are cut with scissors and wiped off with their hands.

Third, we must combine irrigation and apply fertilizer.

The flowering period of oil is not only a critical period for water, but also a critical period for fertilizer. 10-15 kg of urea per mu and 5-10 kg of potassium fertilizer is required to enhance the function of the later leaves and improve the disease resistance. Combined with irrigation and topdressing, deep cultivation of soil in the line can improve the ability of the plant to resist.

In addition, the leaf surface can also be combined with leaf surface to fertilize the leaf surface. Leaf surface fertilization is a fertilization method often adopted in the middle and late stages of crop growth. It has the characteristics of strong targeted, fast absorption speed, not affected by soil environmental factors, high nutrient utilization rate, low fertilization, and significant production effect. The spraying concentration of the leaf surface should be appropriate. Because the leaf surface is topdressing on the surface of the oil plants, unlike the soil fertilization, the soil can be used to relieve the harm caused by high concentration of fertilizer. Applying concentration. The principle is that the concentration of the seedling period is slightly lower, and the concentration in the middle and late stages is slightly higher. The fertilization concentration of the leaf surface is appropriate to be 0.3%to 0.5%of the urea solution, and the concentration of 0.2%to 0.3%of the potassium dihydrogen phosphate solution is better. (Hunan Daily All Media Reporter Zhou Yangle Correspondent Liu Weishuai Liu Baihao)

[Responsible editor: Wang Yaobing Intern: Yang Shuwen]

[Source: Hunan Daily · New Hunan Client]

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