Planting method of oil green beet heart (with planting time)

Selected varieties: Youqing 12 Zaocin, Youqing Sijiu (No. 31) and Dongguan 45 days. Land selection and preparation: choose loam or sandy loam with fertile, loose and rich organic matter. Planting time: the suitable sowing time is from May to October, and the seed amount is 400-500g. Cover sunshade net: cover and moisturize with cool gauze after sowing. Fertilizer and water management: can apply rotten pig manure and compound fertilizer. Prevention and control of diseases and insect pests: use Ye Banjing and vegetable Fengning and other chemicals to control.

I. selection of varieties

There are many varieties of early-maturing Brassica napus, such as Youqing 12, Youqing Sijiu (No. 31) and Dongguan 45 days, which have strong heat tolerance and resistance, high yield and good quality.

II. Land selection and preparation

The main results are as follows: 1. Early-maturing Brassica campestris is more fertilizer-tolerant, and it is necessary to choose loam or sandy loam with fertile, loose and rich organic matter in production, with stronger bolts, higher yield and better quality.

2. Before sowing, deep ploughing and drying ridges should be made, and then sufficient basic fertilizer should be applied to prepare the soil, so that the surface of the border is tortoise back, without macropores and cracks. Generally, the width of the border is 1.5-1.7m and the height of the border is 20-30cm.

Third, planting time

The suitable sowing time of early-maturing Brassica campestris is from May to October, and the suitable sowing date is from August to October. Direct seeding is generally used in high temperature and rainy season, and the seed consumption per mu is 400-500g. The transplanting seedling age is 15-18 days, and the seedling has 3-4 leaves.

Fourth, cover the sunshade net

The main results are as follows: 1. Covering and moisturizing with cool gauze after sowing has the functions of preventing high temperature burns, rainstorm impact and soil consolidation, which is beneficial to seedling emergence, full seedling and whole seedling, quickly uncover the sunshade net after emergence to prevent overgrowth, and plant in high temperature and rainy seasons. in order to avoid the adverse effects of bad climate on the growth of Chinese cabbage.

2. Generally, the sunshade net can be raised by 80-100cm after emergence, and a small flat shed can be built on the border surface for heat and rain protection, which is suitable for 10-15 days. If seedling transplanting is adopted, it can be covered for 5-7 days after transplanting, but not for the whole growth period. When covered, the silver-gray sunshade net with a shading rate of 45% has a better effect.

3. When the true leaves of seedlings are unfolded, it is necessary to remove dense, weak or diseased seedlings in time, interseedling and fixed seedling at 3-leaf stage, the distance between seedlings is about 13cm, and the weak and inferior plants need to be removed before budding, which is beneficial to ventilation and light, strong bolting and improving the commodity rate and the quality of cabbage.

5. Fertilizer and water management

The main results are as follows: 1. The heart growth period of early-maturing Brassica campestris is short and the growth rate is fast, so it needs to apply sufficient basic fertilizer, generally applying 1500-2000kg of rotten pig manure or 750kg of chicken manure per mu, 20-30kg of compound fertilizer should be fully mixed with soil, and topdressing should be applied in time during the growth period.

2. Quick-acting nitrogen fertilizer is the main fertilizer in the early stage of topdressing, and the application of phosphorus and potassium fertilizer in the middle and later stage is beneficial to improve the yield and quality of Chinese cabbage. It is necessary to avoid fertilizer falling on flower buds, avoid causing rotten buds, pay attention to watering and keep the border surface moist.

3. Generally, when the first true leaf grows, it can be watered with dilute manure water once, or the seedlings can be raised with urea 3-5kg per mu, and the seedlings can be topdressing at 3-leaf stage with 1000-1500kg or urea 5kg per mu, which can be mixed with compound fertilizer 10kg.

4. Every 5-7 days or so, 30% of 40% of human feces and urine water 1000-1500kg or urea 10kg per mu will be mixed with compound fertilizer 20kg once, and the fertilization will be stopped when the cabbage is harvested, and the fertilizer can be topdressing about 3-4 times during the whole growth period.

VI. Prevention and control of diseases and insect pests

The main results are as follows: 1. the main diseases are anthrax, soft rot and so on. Anthrax is a high-temperature and humid disease. The pathogen mainly invades from the wound and spreads by Rain Water and insects, which occurs more frequently from April to September every year.

2. In recent years, the occurrence is relatively common, which has a great impact on the production of Chinese cabbage. In production, attention should be paid to the selection of high border planting on the land with good drainage and irrigation, crop rotation, pastoral cleaning, removal of diseased plant residues and strengthening management.

3. In the early stage of the disease, 1000 times of Ye Banjing, 1000-1500 times of Shibao Gong, 1000 times of carbendazim wettable powder and 4000 times of topiramine wettable powder can be used alternately. Soft rot can be prevented and treated with 1000 times of Dexong wettable powder, 500 times of Caifengning and 3000-4000 times of agricultural streptomycin.

4. The main pests are Plutella xylostella, Pieris rapae, Plutella xylostella, Spodoptera litura and so on. Attention should be paid to the control of Pieris rapae, Plutella xylostella and Spodoptera litura in the middle and later stage.