What if the temperature of shepherd's purse is too high?

Shepherd's purse planting temperature is too high, and at the same time, a sunshade net is set for cultivation, which is opened in the morning and evening and covered at noon to cool down.

cultivation techniques

Carry out soil preparation

Shepherd's shepherd's purse seeds are small, so it is necessary to choose plots with less grass and ask for flat and sparse cutting. When preparing soil, deep ditches and high ridges should be made for irrigation and drainage. The width of the frame is generally about 1.5m (even ditch), and every two frames are provided with a deep ditch.

sow seeds

(1) sowing date: late February to late April for spring ploughing, early July to late August for Xia Geng, and early September to early June for autumn ploughing 10.

(2) Sowing amount: 0.75 ~ 1 kg in spring, 2 ~ 2.5 kg in summer and 0 ~1.5 kg in autumn per 667 square meters.

(4) Land selection and soil preparation: shepherd's purse has strong adaptability. In addition to soil preparation, it can also be planted by ridge cultivation, leisure border after wind barrier and field edge. If planted in pieces, it is best to choose tomatoes and cucumbers as the first crop in autumn and garlic seedlings as the first crop in spring to avoid continuous cropping. After the plot is selected, deep tillage 15 cm, sole fertilizer application and fine harrow leveling will be carried out to make a high border with a width of about 2 meters.

(4) sowing method; Shepherd's purse should be sown evenly. After sowing, you should tread lightly on the border and chase with your feet to make the seeds in close contact with the soil, which will help the seeds absorb water and emerge early. Sowing in summer and autumn, you can wet the land 1-2 days before soil preparation, and then prepare the soil for the border. For example, when sowing new seeds harvested that year in summer and autumn, the seeds should be germinated at a low temperature of 2 ~ 7℃ (refrigerator) before sowing, because the seeds are not out of dormancy.

operate

After emergence, fertilizer and water management should be strengthened, the growth period of spring and summer sowing is short, and topdressing is usually twice; Autumn sowing has a long growth period, topdressing for 4 times, and watering diluted human and animal manure 1500 ~ 2000 kg every 667 square meters. Shepherd's purse has a high planting density and needs a lot of water, so it should be watered frequently to keep the soil moist. In summer and autumn, if the soil splashes on the leaves or heart of cabbage after a thunderstorm, it should be washed away with a watering can in the early morning or evening, otherwise it will affect the growth. Weed 1 ~ 2 times after emergence, pull the grass by hand and pick the big grass with a knife. Aphids are the main pests of shepherd's purse and should be prevented in time.

choose

Spring sowing and summer sowing of shepherd's purse usually take 30 to 50 days from sowing to harvesting; Harvest 1 ~ 2 times. Shepherd's purse sown in autumn is sown once and harvested many times. In order to increase the yield and extend the supply period, shepherd's purse should be carefully harvested diligently, densely harvested and sparsely harvested, so that shepherd's purse can grow in a balanced way.

Reserve seed

To cultivate shepherd's purse, a seed farm should be established, and no seeds should be left in the ground. Generally, the reserved field sowing date is 65438+1early October, and the sowing amount per 667 square meters is about 1kg. After sowing, the seedlings should be thinned for 3 ~ 4 times, and the miscellaneous seedlings and weak seedlings should be removed. Choose the last time in the early stage of vine pulling, pull out the shy seedlings early, keep the seed plants evenly, set up a Taneda with a square of 12cm, properly control the nitrogen fertilizer, increase the application of phosphorus and potassium fertilizer, and prevent aphids in time.

Timely seed collection is the key technology to keep shepherd's purse seeds. From July to August to moderate seed collection, the seed pods turn from green to yellow and mature. Seeds should be collected around 10 on a sunny morning, spread the cut seeds in the sun, and then spread sheets on the ground to rub out the seeds. After the seeds are cleaned, continue to dry for 3 days, but avoid exposure. After the seeds are completely dried, put them in a very dry container (preferably a cylinder or tile) and put a desiccant in the container.