Is Northeast Soybean Suitable for Planting in Baoding, Hebei Province?

Northeast soybeans can be planted in Baoding, Hebei. Within the range of species distribution, attention should be paid to cultivation management.

Analysis and explanation:

Soybean is native to China, and has been cultivated all over China, especially in Northeast China, and also widely cultivated all over the world.

Soybean likes temperature. The seeds germinate at 10- 12℃, and the optimum growth temperature is 15-20℃ and 20-25℃.

Baoding has an average annual temperature of 12℃ and an annual precipitation of 550 mm, which belongs to a temperate monsoon climate.

Therefore, northeast soybean can be planted in this area.

Growing habits:

Soybean likes temperature. Seed germination temperature 10- 12℃, optimum temperature 15-20℃, growth 20-25℃, flowering and pod-setting period 20-28℃, delayed pod-setting at low temperature, unable to bloom below 14℃, and too high temperature.

Seed germination needs more water, and the soil water content is required to be 70%-80% at flowering stage, otherwise it will increase the bud drop rate.

The amount of fertilizer absorbed by soybean before flowering is less than 15% of the total absorption, while the flowering and pod-setting period accounts for more than 80% of the total absorption.

Training points:

First, choose high-quality and high-yield varieties.

According to local natural conditions (including climate, soil fertility, etc. ), the production level and ecological type of varieties should choose high-quality soybean varieties with suitable growth period, strong stress resistance and high yield.

Second, deep fertilization.

Under normal circumstances, fertilizer seeds are applied separately at 4 ~ 5 cm below the seed side, and the amount of fertilizer can be adjusted.

When more than 20kg of diammonium phosphate is applied per 667m2, it can be applied in layers: the upper layer is 5-7cm deep, and the fertilization amount accounts for1/3; The depth of base fertilizer 10- 16 cm, and the amount of fertilizer applied accounted for 2/3.

Or after the previous crop is harvested, spread the fermented organic fertilizer evenly on the ground, then rake the fertilizer into the soil with a rake, fully mix the manure with the soil, and then dig it deeply, and the raked bottle is finely ridged, or plant soybeans flat.

Third, implement precision sowing.

Reasonable rotation: it is best to choose the right stubble, not heavy, and plant it later.

Careful soil preparation: ploughing in summer and autumn according to the previous crop, with a depth of 22 ~ 25 cm. When operating, there will be no big clods or exposed strips, and the buttons are important, not heavy or leaking.

Suitable soil water content: after soil preparation, the soil water content (calculated by dry soil weight) should be about 22% when sowing, so as to ensure that seeds can normally absorb water and germinate.

Sowing in time: After the wheat harvest, summer sowing soybeans in our county can be sowed as long as the water content is suitable.

The best sowing date is June 10 ~ 25, and no later than early July.

Fourth, on-site management

Mowing and intertillage:

Before the first compound leaf, hoes were everywhere, so that hoeing seedlings would not hurt them or loosen the soil.

When the seedling height is about 10 cm, the second intertillage should be carried out to avoid damaging the seedling, pressing the seedling or leaking grass.

After the second intertillage 10 days or so, it is necessary to carry out the third time and put more soil.

(2) Chemical weeding

In the early stage of soybean growth, when there are many weeds in the field, chemical control should be carried out when the weeds are basically eliminated and the management is in good condition, sooner rather than later.

At present, the most commonly used broad-spectrum herbicides for pre-seedling weeding are propafenone and clomazone, which are effective against many gramineous and broad-leaved weeds in soybean fields.

Dosage: 5% Puster aqua, the dosage is per hectare1.5 ~ 2kg; 48% clomazone EC, 2 ~ 2.5 kg per hectare.

Pust, tribenuron-methyl and clomazone can remain in the soil for a long time, so special attention should be paid to the phytotoxicity of the following crops.

Herbicide types suitable for early emergence: Pust is the most widely used herbicide in production at present.

When weeds are first unearthed, they are generally not later than the second compound leaf stage of soybeans.

The dosage of common application before emergence is: 5% common application solution per hectare 1 ~ 1.5 kg, which should not exceed 1.5 kg. Choose the weather with high humidity before and after rainfall, and avoid high temperature and dry noon and windy weather.

The dosage of nabujing emulsion is 12%, and the dosage per hectare is1~1.5 kg; 65,438+0.5% concentrate, the dosage per hectare is 0.75 ~ 65,438+0 kg; 5% Jingcaoke EC and 24% Kekuole EC, the dosage per hectare is 0.33 ~ 0.75 kg.

The application period is suitable for herbicides in the late stage of emergence, and it is usually applied in the period of 2 ~ 3 soybean leaves.

When the soil moisture is good in spring, pesticides can be applied earlier, and the lower limit is generally used.

In spring drought, the application can be delayed appropriately, and the dosage is generally the upper limit.

Verb (abbreviation of verb) pest control

Carnivorous soybean moth larvae crawl into pods and eat beans. In severe cases, it usually eats more than half of beans, reducing the yield and quality of soybeans.

The key to control soybean moth is to seize the appropriate period, that is, to control it in the peak period of adults and when flying in groups in the field.

The key to prevent and control soybean aphids is early detection and prevention.

Generally, 800 times of 40% dimethoate emulsifiable concentrate and 2000 times of 20% chlorpyrifos emulsifiable concentrate are used, or 2.5% dichlorvos emulsifiable concentrate, 5% Laifuling emulsifiable concentrate and 3% acetamiprid emulsifiable concentrate are used. The dosage is 667 m2 15 ~ 20ml, and 40 ~ 50kg of water can be sprayed.