Early-mapping varieties were planted in mid-august, medium- and late-maturized varieties in late august and early september, and late-maturized varieties in late august。
Deep tillage and dredge the soil, then levelling it, digging trenches and applying manure into them。
3. Bellow varieties that are more resilient are targeted for cultivation and are sowed in the form of caves, with a seeding rate of 3 to 4 grains per den。
4. After the seedlings grow 5-6 leafs, the plant is transported at 20 cm range。
5. Work on fatting, weeding, pest control, etc。
Timing of cultivation
Early-maturity varieties, mostly grown in the middle of august each year。
2. Mid- and late-lated varieties are mostly grown from late august to early september。
3. Lately matured varieties, mostly for late august each year。
Ii. Cultivation methods
1. Fertilizing the whole area
(1) use of lax, fertilized, organically rich sandy plots as planting grounds, requiring the front crop to be non-crucial vegetables。
(2) seven days before the planting, the fields were soaked with dredges, flattening, digging gavages and then placing in the gutter sufficient decomposed manure。
2. Cultivation
(1) to target varieties with high resistance to cold, resistance and pests and then sowing them in the form of caves or strips, machine sowing, with 3-4 seedlings per den and 0. 5 kilograms per acre。
(2) the sowing shall be followed by water so that the soil is kept moist。
3. Replanting
(1) after the birth of 5-6 leafs, the seedlings begin to be replanted, which should be avoided from the period when the light is stronger at noon, generally in order to be carried out in the middle of the afternoon in the clear weather, thus increasing the survival rate of the seedlings。
(2) the transfer density is determined on the basis of conditions such as soil, the variety of cabbage, which is suitable for a distance of about 20 cm, and is to be filled with water in a timely manner so that the seedling can be brought to life。
4. Field management
(1) during the lotus period, one dose of nitrogen fertilizer, supported by appropriate levels of ammonia。
(2) during the end of the season, the main application of amino and the accompanying application of nitrogen fertilizer contribute to the expansion of cabbage。
(3) in case of pests such as aphids, night moths, low poisons may be sprayed。
(4) the presence of weeds in the field may be artificially removed and, to the extent possible, herbicides may not be used in order to prevent effects on cabbage。
(5) anthrax can be combated by 80% huf 800 times anthrax at the beginning of the onset of the disease, or by 50% of the polybacterium 500 times the fluid, or 40% of the polythiosulphine suspension 600 times the fluid, or 1,000 times the polyoxyacin, with two to three times the continuous spraying every 7-10 days。
