Chinese cabbage rosette period management technology

At present, the autumn sowing Chinese cabbage has entered the rosette period, the outside temperature has gradually decreased, and the growth rate of Chinese cabbage has accelerated. This is the period during which Baoxin has laid the foundation, the formation of outer leaves, the differentiation of spherules, and the lowering and thickening of the roots. The period is an important stage of production. The field management at this stage is very important, and the main objective of management is to promote the robust development of the outer leaves, normal differentiation of the heart and the development of the root system.

First, timely and reasonable seedlings and close planting.

When planting 3-5 leaves, the seedlings were planted in time, the plant spacing was 35-45 cm, and 2200-2700 plants were planted per acre. The specific density was determined according to the variety, soil fertility, and sowing date. Premature and small-plant type cultivars have smaller plant spacings, late-maturing and plant-type cultivars have larger plant spacings, soil fertility has larger plant spacings, and low-fertility plant spacings are smaller; late planting sites have smaller plant spacings. To retain leaves and leaf shape consistent with this species, petiole short and wide, there are obvious leaf wing seedlings, remove weak seedlings and hybrid seedlings. Sandy soil should be poured with small water to sink soil after it is set, protect the roots, and lower the soil temperature. Occurrence of seedlings should be promptly filled seedlings, and sooner the better, Miao should be carried out in the evening, timely watering after planting.

Second, weeding weeding.

During the whole growing period, cultivating and weeding should be done 2-3 times. After the first time, the plants should be about 3 cm deep after the seedlings, in order to cut the soil surface, aiming at loosening the topsoil and weeding the weeds; the second time after the setting, the depth 5-6 cm is appropriate, in order to promote the root system to the depth of the soil, and "seeding" about 10 days. In the rosette period, weeding and weeding should be carried out before unsealed ridges, but it should be carried out when the leaves are relatively soft in sunny weather so as not to damage the leaves. To master the principle of “deep sewers and shallow backs”, the ridge back depth should not exceed 4 cm, and the furrow depth should be 8-10 cm. After mulching, no cultivators will be adopted.

Third, science watering.

At noon, the temperature is still high, and small water should be poured along the ditch to reduce ground temperature and promote growth to prevent the occurrence of viral diseases. After the seedlings are finished, they are usually watered once every 5-7 days, and the amount of water should be even to prevent flooding.

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