The occurrence and control of arrow entrapment in Cymbidium, to understand the cultivation techniques of edible fungi.

When the gentleman orchid draws an arrow, the stalk of the arrow can not come out, and the phenomenon that it blossoms in the tower is called a clip arrow. The main reasons for the entrapment of arrows are as follows:

First, the temperature is not suitable: the optimum temperature for the growth of Cymbidium is 15-25 ℃, if it is lower than 15 ℃, it is difficult to draw flowers and arrows; if the temperature is higher than 25 ℃, it is not conducive to drawing arrows.

Second, the temperature difference is not enough: gentleman orchids like to have a certain temperature difference between day and night, and it is difficult to move arrows if the temperature difference between day and night is less than 7 ℃.

Third, unreasonable nutrition: the flowering period of Magnolia needs more phosphorus and potassium fertilizer, so the application of too much nitrogen fertilizer and lack of phosphorus, potassium and trace elements will affect the flowering of arrows.

Fourth, water is not enough: water can make the plant maintain a normal posture, and the cells and tissues in the body contain enough water in order to carry out normal physiological activities. In the arrow-drawing stage, the gentleman orchid needs more water, and if the water supply is insufficient at this time, there will also be the phenomenon of arrow clamping.

Fifth, the pressure is too great: because the pressure of the leaf sheath and the false bulb is too great, the scape cannot escape inside, which causes the gentleman orchid to clip the arrow.

According to the above causes, the following corresponding prevention and control measures can be taken.

First, adjust the temperature: if the arrow is caught in the orchid caused by the low temperature, the flowerpot can be put on the radiator or on the hot Kang (the bottom of the pot should be padded with a thin plank), so that the temperature does not exceed 25 ℃; when the temperature is above 25 ℃, the temperature should be cooled in time, and the flowerpot can be placed in front of the fan 1 meter in front of the fan.

Second, maintain the temperature difference: if you find that the false bulb of Cymbidium is raised, and the newly grown leaves appear "arrow path" (refers to the appearance of the newly grown leaves after flower bud differentiation, it is a sign of running arrows. At this time, attention should be paid to adjusting the temperature so that the temperature during the day reaches 25 ℃ and the temperature at night is controlled at 15 ℃, so that the temperature difference between day and night can be maintained at 10 ℃.

Third, rational fertilization: gentleman orchid to the autumn, turned to the reproductive growth period, the need for fertilizer increased. At this time, attention should be paid to rational fertilization. In general, after three years of cultivation, the frequency of fertilization must be increased in autumn, and it is best to use liquid fertilizer with high phosphorus content. When arrow outcrop is found, 0.3% potassium dihydrogen phosphate can be sprayed on the leaf surface to promote flower bud differentiation and rapid arrow movement.

Fourth, moderate watering: more water is needed in the arrow pumping stage, so we should pay attention to increasing the amount of water, watering once every 3-5 days, the temperature of the water is slightly higher than the soil temperature, the amount of water should not be too much, if too much watering, it will reduce the temperature in the basin.

Fifth, reduce pressure: you can use a sterilized blade to cut open the leaf sheath containing the scape 1.5 cm, relax the pressure on the sheath base on the scape, and promote the scape to jump out. (source: melons, fruits and vegetables)