Guidelines for the application of nitrogen fertilizer

According to its growth period and variety characteristics, the growth of orchid is beneficial to the growth of orchid by supplying different amounts and kinds of nitrogen fertilizer.

(1) when ramet:

2% organic matter fertilizer with complete sterilization, no bacteria and no pests can be mixed in the medium, or chemical fertilizer with 2% long-acting type and high nitrogen content can be placed two weeks after ramet planting, such as Lankangduo No. 2 long-acting slow-acting fertilizer, whose N, P and K content is 16, 16 and 14, respectively. Xidolan machine fertilizer is used as base fertilizer to steadily supply the nutrients needed for the growth of Chinese orchid. It will not cause the lack of major nutrient elements in the growth process of national orchid, and promote the growth of national orchid.

(2) from the budding stage to the vegetative growth period:

At this time, the national orchid needs more nitrogen fertilizer supply to promote its stem and leaf growth. The supply of reasonable and appropriate amount of available fertilizer can promote chlorophyll synthesis, increase photosynthesis, increase growth rate, increase leaf area and luxuriant stems and leaves. In terms of chemical fertilizers, one thousand to three thousand times the proportion of 2O-2O-2O in N, P and K can be applied at the budding stage, combined with 1000 times of plant-based organic matter growth promoter Langenwang, or 600 times of wood wax plus acidophilic acid, etc., once a week for middle nutrition. In winter, the temperature is low, the light is weak, the growth of national orchid is slow, and the required nutrients are small, which can be reduced appropriately.

(3) from the middle stage of vegetative growth to the early stage of pseudocorm hypertrophy:

At this time, if you supply too much nitrogen, it is easy to cause overgrowth and delay corm ripening, you can use chemical fertilizers N, P, K content 15-3O-15 dilution 1000 to 1500 times, and with organic matter growth promoter Langenwang 8OO times, or Xidolan and Isenglan and orchid world full point 18 activation after use, every 7-10 days. Before flowering, the night cooling method and plant lamp were used to prolong the light hours, improve the luminosity and temperature of the orchid room at night, shorten the temperature difference between day and night, restrain the dormancy or semi-dormancy of the orchid, and apply appropriate nitrogen fertilizer to prevent the transformation from vegetative growth to reproductive growth, promote the growth of lateral buds, increase the rate of coming buds and reduce the number of flowers.

(4) from the corm hypertrophy stage to the corm maturity stage:

If too much nitrogen is applied, the ripening of stems and leaves will be delayed and the bulbs will be fine. at this time, it is necessary to use chemical fertilizers with the content of N, P, K 15, 15, 15, 30, diluted 1, 000 to 2, 000 times, combined with the natural growth-promoting enzyme "good harvest" and Langenwang rooting agent 800 times each, once a week. The national orchid plants with exuberant roots, thick stems and leaves, enlarged corms, high budding rate and increased leaves can be cultivated.