Rapeseed is the main oil crop in some areas. It has the function of land and land. The vegetable oil has rich nutritional value and has many advantages that animal oil does not have. The main points of rapeseed cultivation techniques in Lufeng County are:
First, the selection of good varieties
The suitable rapeseed varieties are Huahua No.3, Huayou No.4, Huayou No.7 and A35.
Second, fine land preparation, improve the quality of sowing
The rapeseed seeds are small, and the topping ability is weak when germinated. The loose layer of soil is required, and the soil is finely ground to make it smooth and fine.
Third, timely seeding
Timely sowing to avoid or reduce frost is an important measure to capture high yield of rapeseed. The best sowing period in mid-altitude areas is from October 15th to 25th, and the cold and cold areas are from October 1st to 10th.
Fourth, reasonable close planting
1. For plots with good fertility conditions, use 1.0-1.21.0-1.2 city scales to sow ponds, and 2-3 strains per pond, with a density of 1.2-15,000 per acre.
2. The plots with medium fertility conditions are planted in the pond with 0.8-1.00.8-1.0, and 2-3 strains per pond, with a density of 1.5-18,000 per acre.
3. Fields with poor fertility conditions can be planted in the pond with 0.6-0.80.8-1.0 market size, and 2-3 strains per pond, with a density of 1.8-20,000 per acre.
5. Scientific fertilization to achieve reasonable coordination of nitrogen, phosphorus, potassium and boron
1. The base fertilizer is 1500-2000 kg per mu, and the calcium is 30 kg;
2, the fertilizer fertilizer with urea 4-5 kg ​​water pumping pond, borax 2 kg, potassium sulfate 10 kg mixed fine soil cover pond.
3, Miao fertilizer 2-3 leaf stage combined with seedlings with ammonium bicarbonate 30-35 kg or urea 15-20 kg with water for planting fertilizer.
4, five-leaf fertilizer five-leaf stage combined with fixed seedlings per acre with urea 15-20 kg of water to promote the flower bud differentiation.
5, bud moss fertilizer in rape 10-11 leaves, moss height 2-3 inches, per acre with ammonium bicarbonate 20-25 kg.
Sixth, strengthen field management
1. Time and seedling time The seedlings are the important link to control the density and ensure the uniformity of the seedlings and the strong seedlings. The principle is that the large and weak ones are strong and strong, and the seedlings are fixed in the five-leaf stage, so that the seedlings are strong and strong.
2, timely tillage
The five-leaf stage cultivating soil is conducive to the growth of rapeseed roots. The medium sand can eliminate weeds, increase the ground temperature, and effectively promote the good growth of rape roots, stems and leaves;
3, timely irrigation
In some areas, the drought in winter and spring is prominent. From bolting to maturity, it is about 100 days. In the bolting, initial flowering, full bloom and final flowering period, it should be timely watered to meet the growth and development needs of rapeseed.
4. Timely prevention and control of pests and diseases
The diseases of rapeseed mainly include clubroot disease and white rust. The insect pests are mainly aphids, leaf bees and cabbage caterpillars. The control agents include daisen zinc, Bordeaux mixture, white fungus, carbendazim, imidacloprid, green leaf green, poisonous silk, etc. .
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