Techniques for regulating flowering period by planting mango

Guangdong mango usually blossoms around February every year. At this time, often encountered the influence of northern cold air to the south, low temperature, continuous rain, high air humidity, resulting in anther not split, stigma damaged, and even ear mildew withered and affected the fruit of the year. According to the results of expert research, the low temperature will increase the percentage of mango male flowers, and the anthers will not crack when the temperature is below 20 ℃, but not until more than 25 ℃. Mango blossoms under the condition of low temperature, overcast and rain, because the anther does not split, lack of pollen pollination affects insect activity and hinders pollination, so mango has low or even no yield, mango pollen grains will not germinate at low temperature below 15 ℃, poor germination at 15 ℃ ~ 20 ℃ and excellent germination above 25 ℃. Therefore, the low temperature of mango flowering stage, even if a small number of pollen pollination, but also because there is no germination, can not be pollinated and less fruiting. Thus it can be seen that the flowering period of mango trees must be delayed in order to avoid the influence of low temperature and rainy weather in winter and increase the yield. After years of research by experts, the following techniques for regulating the florescence of mango can be used to delay the flowering period of mango, avoid the influence of bad weather and increase the yield.

1. Re-pruning

Because of the strong heterogeneity of the buds on the mango branches, the terminal buds are strong, and the buds below the terminal buds are the second, and the buds are less substantial as they go to the base of the branches, and it takes a long time to germinate. Therefore, taking the measures of re-pruning and using the buds at the base of the branches to germinate new shoots can delay the occurrence and growth period of autumn shoots, thus delaying the flowering period of mango.

2. Delay pruning time

Results sooner or later, the mature mother branch has a direct impact on flower bud differentiation, generally early mature fruit mother branch flower bud differentiation. Generally, the secondary shoot of the orchard that is pruned before August of each year will mature in October, and the fruiting mother branch of October will generally blossom around February. If the pruning time is pushed back one month, that is, September, the flowering period of the mango tree can be pushed back accordingly.

3. Spraying to control early flowering

From late December of that year to January of the following year, spraying mango trees for 2 times with growth regulators of 1000 mg / kg to 2000 mg / kg could effectively delay flower bud germination and promote flower bud differentiation of mango.

4. Pick off the ear of early flower

Mango trees usually begin to blossom in mid-late December. When the growth of the flower ear reaches 5 cm to 10 cm, only 1 cm to 2 cm at the base of the style is left, and all the rest are removed (be careful not to hurt the branches), and then picked in batches until in front of the Beginning of Spring. Force the spike to grow from the base of the spike or from the leaf axils. It takes about 1 month to pick out the spike again once. If it is removed twice, the florescence can be delayed by 2 months. The varieties with high panicle re-extraction rate can be removed repeatedly for 2 or 3 times. Use regenerated flower spikes to bear fruit.

5. Spray to promote flower extraction.

The Beginning of Spring was sprayed with potassium nitrate for flowering once in February. Spray 1%-2% potassium nitrate plus 0.3% urea on the leaf surface and spray it to the leaf surface to be moist. Observe once 10 days after spraying, and spray again if you find that the spike is not evenly drawn.