Double harvest of potato and spring onions in one place

First, the cultivation of potato in the previous crop

1. The potato variety suitable for multiple cropping of potato onions in Xiongyue area is "Dongnong 303", with 15 kg of seeds per mu and 4500 seedlings.

two。 Deep ploughing and fertilization in autumn, the depth of the soil is 15cm to 20cm, spring lucky land, 4000 kg of high-quality organic fertilizer per mu is used as base fertilizer.

3. Seed potato sprouting in early March, put the selected seed potato in the greenhouse or Kang head for about 10 days. It is suitable for seed potato to be cut into 20g / 30g, cut and sown for 6d / 12d, then the seedlings can be raised in the shed. Place the potato pieces in the shed one by one, with the bud eyes up and covered with fine fluvo-aquic soil or wet sand. After 10-15 days, the buds can be sown when the buds grow to 2-3 cm.

4. Timely ridging and sowing can be carried out when the ground temperature at 10 cm in the open field is stable at 7-8 ℃, and it can be planted at the end of March. When planting, do 1.2 meters wide ridge, break the ridge to open double trench, apply 15 kilograms of diammonium phosphate per mu to do mouth fertilizer, put in the middle of the two ridges. Put the potato pieces according to the row spacing of 40 cm and the plant spacing of 25 cm and surround them with soil. Irrigation and moisture cover the soil and cover the plastic film.

5. The seedlings were introduced by drilling holes in the plastic film 7-10 days after planting in the field management, and the soil was cultivated around the seedlings. After flowering, the tuber begins to expand and needs more water. It can be watered in case of drought, and each watering should not exceed half of the ridge height, so as to keep the soil loose and moist, which is beneficial to the expansion and growth of tuber. Potatoes should pay attention to the prevention of aphids and spray with 10% imidacloprid wettable powder 3000-5000 times or 40% dimethoate EC 1000 times, or 50% aphid-proof wettable powder 2000-3000 times. Harvest from late May to early June.

II. Cultivation and management of green onions

The excellent variety "Xianfeng 1" was selected to raise seedlings from April 5 to 10, sparsely sowing and strong seedlings. The potatoes were prepared in time after harvest and planted at the end of June. In order to increase the yield of green onion, more organic fertilizer should be applied, topdressing 3-4 times during the growth period, nitrogen fertilizer in the early stage, phosphorus fertilizer in the middle stage, and potash fertilizer in the later stage. Micro-fertilizer was sprayed 3 times and 4 times.

Third, pest control measures

1. Beet leaf moth was sprayed with 5% Tabao EC 1000-1500 times before the 3rd instar of the larvae, or with 15% Ambient suspension 3500-400 times, or 52% Nongdile EC 1000 times.

two。 Spring onion thrips field 100 insect population up to 50 million immediately apply, can spray 10% imidacloprid wettable powder 2500 times or 40% green vegetable treasure EC 1500 times, can also use 400 times solution to kill pyrethrin spray.

3. At the initial stage of the onset of rust, 20% powder was sprayed with 2000-fold solution of wettable powder. In addition, diazepam sodium 300x liquid or 70% mancozeb wettable powder 1000 times liquid plus 15% triadimefon wettable powder 20 times solution, spray once every 10 days, continuously spray 2 times 3 times, all kinds of agents should be used alternately.