Key points of cultivation of orchids and new high-yielding techniques of broccoli in autumn

1. Weeding and soil cultivation in middle ploughing. The soil should be ploughed and loosened in time after planting, which is beneficial to increase the soil temperature and eliminate weeds. In order to prevent root damage, weeding should be completed within 1 month after planting. Generally combined with topdressing and ploughing for 2-3 times, loosening the soil and weeding before topdressing, cultivating soil and spraying new high-fat film in time after topdressing can preserve soil moisture and prevent moisture evaporation, sun and drought resistance, heat preservation and freezing, soil layer hardening, suffocation and isolation of disease and insect sources. 2. Fertilizer and water management. Broccoli is a vegetable that needs more fertilizer, in addition to applying sufficient basic fertilizer, it has to be applied many times during the growth period, generally the first fertilizer is applied 10-15 days after seedling retardation, and the utilization rate of effective components of fertilizer is greatly improved by spraying new high fat film at the same time. The second fertilizer is applied when the top bud appears, and the appropriate amount of potassium sulfate or plant ash is applied per mu. Foliar fertilizer and strong stem spirit can make the plant stem thick, the leaf thick, the leaf color fresh, the plant luxuriant and the natural taste strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual toxicity. 3. Special species for removing lateral branches and apical flower bulbs. The lateral buds should be removed before the rosette is harvested. There are many lateral branches, and 4-5 strong lateral branches are generally selected to erase the thin and weak lateral branches so as to reduce the nutrient consumption. Broccoli has strong resistance, wide adaptability and no serious disastrous diseases and insect pests. The common diseases are downy mildew, Sclerotinia sclerotiorum, black rot, black spot and so on. The main pests are cabbage, diamondback moth and aphids. Timely spraying of targeted drugs and new high-fat film can improve the efficacy, achieve the best control effect, and reduce the number of pesticide spraying and pesticide residues. (Xiaoye)